diff --git a/core/attributedef.class.inc.php b/core/attributedef.class.inc.php
index 75103971b..252c5b861 100644
--- a/core/attributedef.class.inc.php
+++ b/core/attributedef.class.inc.php
@@ -1,9080 +1,9080 @@
-<?php
-// Copyright (C) 2010-2018 Combodo SARL
-//
-//   This file is part of iTop.
-//
-//   iTop is free software; you can redistribute it and/or modify	
-//   it under the terms of the GNU Affero General Public License as published by
-//   the Free Software Foundation, either version 3 of the License, or
-//   (at your option) any later version.
-//
-//   iTop is distributed in the hope that it will be useful,
-//   but WITHOUT ANY WARRANTY; without even the implied warranty of
-//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-//   GNU Affero General Public License for more details.
-//
-//   You should have received a copy of the GNU Affero General Public License
-//   along with iTop. If not, see <http://www.gnu.org/licenses/>
-
-
-/**
- * Typology for the attributes
- *
- * @copyright   Copyright (C) 2010-2018 Combodo SARL
- * @license	 http://opensource.org/licenses/AGPL-3.0
- */
-
-
-require_once('MyHelpers.class.inc.php');
-require_once('ormdocument.class.inc.php');
-require_once('ormstopwatch.class.inc.php');
-require_once('ormpassword.class.inc.php');
-require_once('ormcaselog.class.inc.php');
-require_once('ormlinkset.class.inc.php');
-require_once('ormtagset.class.inc.php');
-require_once('htmlsanitizer.class.inc.php');
-require_once(APPROOT.'sources/autoload.php');
-require_once('customfieldshandler.class.inc.php');
-require_once('ormcustomfieldsvalue.class.inc.php');
-require_once('datetimeformat.class.inc.php');
-// This should be changed to a use when we go full-namespace
-require_once(APPROOT . 'sources/form/validator/validator.class.inc.php');
-require_once(APPROOT . 'sources/form/validator/notemptyextkeyvalidator.class.inc.php');
-
-/**
- * MissingColumnException - sent if an attribute is being created but the column is missing in the row 
- *
- * @package	 iTopORM
- */
-class MissingColumnException extends Exception
-{}
-
-/**
- * add some description here... 
- *
- * @package	 iTopORM
- */
-define('EXTKEY_RELATIVE', 1);
-
-/**
- * add some description here... 
- *
- * @package	 iTopORM
- */
-define('EXTKEY_ABSOLUTE', 2);
-
-/**
- * Propagation of the deletion through an external key - ask the user to delete the referencing object 
- *
- * @package	 iTopORM
- */
-define('DEL_MANUAL', 1);
-
-/**
- * Propagation of the deletion through an external key - ask the user to delete the referencing object 
- *
- * @package	 iTopORM
- */
-define('DEL_AUTO', 2);
-/**
- * Fully silent delete... not yet implemented
- */
-define('DEL_SILENT', 2);
-/**
- * For HierarchicalKeys only: move all the children up one level automatically
- */
-define('DEL_MOVEUP', 3);
-
-
-/**
- * For Link sets: tracking_level
- *
- * @package	 iTopORM
- */
-define('ATTRIBUTE_TRACKING_NONE', 0); // Do not track changes of the attribute
-define('ATTRIBUTE_TRACKING_ALL', 3); // Do track all changes of the attribute
-define('LINKSET_TRACKING_NONE', 0); // Do not track changes in the link set
-define('LINKSET_TRACKING_LIST', 1); // Do track added/removed items
-define('LINKSET_TRACKING_DETAILS', 2); // Do track modified items
-define('LINKSET_TRACKING_ALL', 3); // Do track added/removed/modified items
-
-define('LINKSET_EDITMODE_NONE', 0); // The linkset cannot be edited at all from inside this object
-define('LINKSET_EDITMODE_ADDONLY', 1); // The only possible action is to open a new window to create a new object
-define('LINKSET_EDITMODE_ACTIONS', 2); // Show the usual 'Actions' popup menu
-define('LINKSET_EDITMODE_INPLACE', 3); // The "linked" objects can be created/modified/deleted in place
-define('LINKSET_EDITMODE_ADDREMOVE', 4); // The "linked" objects can be added/removed in place
-
-
-/**
- * Attribute definition API, implemented in and many flavours (Int, String, Enum, etc.) 
- *
- * @package	 iTopORM
- */
-abstract class AttributeDefinition
-{
-	const SEARCH_WIDGET_TYPE_RAW = 'raw';
-	const SEARCH_WIDGET_TYPE_STRING = 'string';
-	const SEARCH_WIDGET_TYPE_NUMERIC = 'numeric';
-	const SEARCH_WIDGET_TYPE_ENUM = 'enum';
-	const SEARCH_WIDGET_TYPE_EXTERNAL_KEY = 'external_key';
-	const SEARCH_WIDGET_TYPE_HIERARCHICAL_KEY = 'hierarchical_key';
-	const SEARCH_WIDGET_TYPE_EXTERNAL_FIELD = 'external_field';
-	const SEARCH_WIDGET_TYPE_DATE_TIME = 'date_time';
-	const SEARCH_WIDGET_TYPE_DATE = 'date';
-
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	const INDEX_LENGTH = 95;
-
-	public function GetType()
-	{
-		return Dict::S('Core:'.get_class($this));
-	}
-	public function GetTypeDesc()
-	{
-		return Dict::S('Core:'.get_class($this).'+');
-	}
-
-	abstract public function GetEditClass();
-
-	/**
-	 * Return the search widget type corresponding to this attribute
-	 *
-	 * @return string
-	 */
-	public function GetSearchType()
-	{
-		return static::SEARCH_WIDGET_TYPE;
-	}
-
-	/**
-	 * @return bool
-	 */
-	public function IsSearchable()
-	{
-		return static::SEARCH_WIDGET_TYPE != static::SEARCH_WIDGET_TYPE_RAW;
-	}
-
-	protected $m_sCode;
-	private $m_aParams = array();
-	protected $m_sHostClass = '!undefined!';
-	public function Get($sParamName) {return $this->m_aParams[$sParamName];}
-
-	public function GetIndexLength() {
-		$iMaxLength = $this->GetMaxSize();
-		if (is_null($iMaxLength))
-		{
-			return null;
-		}
-		if ($iMaxLength > static::INDEX_LENGTH)
-		{
-			return static::INDEX_LENGTH;
-		}
-		return $iMaxLength;
-	}
-
-	public function IsParam($sParamName) {return (array_key_exists($sParamName, $this->m_aParams));}
-
-	protected function GetOptional($sParamName, $default)
-	{
-		if (array_key_exists($sParamName, $this->m_aParams))
-		{
-			return $this->m_aParams[$sParamName];
-		}
-		else
-		{
-			return $default;
-		}
-	}
-
-    /**
-     * AttributeDefinition constructor.
-     *
-     * @param string $sCode
-     * @param array $aParams
-     *
-     * @throws \Exception
-     */
-    public function __construct($sCode, $aParams)
-	{
-		$this->m_sCode = $sCode;
-		$this->m_aParams = $aParams;
-		$this->ConsistencyCheck();
-	}
-
-	public function GetParams()
-	{
-		return $this->m_aParams;
-	}
-
-	public function HasParam($sParam)
-	{
-		return array_key_exists($sParam, $this->m_aParams);
-	}
-
-	public function SetHostClass($sHostClass)
-	{
-		$this->m_sHostClass = $sHostClass;
-	}
-	public function GetHostClass()
-	{
-		return $this->m_sHostClass;
-	}
-
-    /**
-     * @return array
-     *
-     * @throws \CoreException
-     */
-    public function ListSubItems()
-	{
-		$aSubItems = array();
-		foreach(MetaModel::ListAttributeDefs($this->m_sHostClass) as $sAttCode => $oAttDef)
-		{
-			if ($oAttDef instanceof AttributeSubItem)
-			{
-				if ($oAttDef->Get('target_attcode') == $this->m_sCode)
-				{
-					$aSubItems[$sAttCode] = $oAttDef;
-				}
-			}
-		}
-		return $aSubItems;
-	}
-
-	// Note: I could factorize this code with the parameter management made for the AttributeDef class
-	// to be overloaded
-	static public function ListExpectedParams()
-	{
-		return array();
-	}
-
-    /**
-     * @throws \Exception
-     */
-    private function ConsistencyCheck()
-	{
-		// Check that any mandatory param has been specified
-		//
-		$aExpectedParams = $this->ListExpectedParams();
-		foreach($aExpectedParams as $sParamName)
-		{
-			if (!array_key_exists($sParamName, $this->m_aParams))
-			{
-				$aBacktrace = debug_backtrace();
-				$sTargetClass = $aBacktrace[2]["class"];
-				$sCodeInfo = $aBacktrace[1]["file"]." - ".$aBacktrace[1]["line"];
-				throw new Exception("ERROR missing parameter '$sParamName' in ".get_class($this)." declaration for class $sTargetClass ($sCodeInfo)");
-			}
-		}
-	}
-
-	/**
-	 * Check the validity of the given value
-	 *
-	 * @param \DBObject $oHostObject
-	 * @param $value Object error if any, null otherwise
-	 *
-	 * @return bool
-	 */
-	public function CheckValue(DBObject $oHostObject, $value)
-	{
-		// later: factorize here the cases implemented into DBObject
-		return true;
-	}
-
-	// table, key field, name field
-
-    /**
-     * @return string
-     * @deprecated never used
-     */
-	public function ListDBJoins()
-	{
-		return "";
-		// e.g: return array("Site", "infrid", "name");
-	}
-
-	public function GetFinalAttDef()
-	{
-		return $this;
-	}
-
-	/**
-	 * Deprecated - use IsBasedOnDBColumns instead
-	 * @return bool
-	 */
-	public function IsDirectField() {return static::IsBasedOnDBColumns();}
-
-	/**
-	 * Returns true if the attribute value is built after DB columns
-	 * @return bool
-	 */
-	static public function IsBasedOnDBColumns() {return false;}
-	/**
-	 * Returns true if the attribute value is built after other attributes by the mean of an expression (obtained via GetOQLExpression)
-	 * @return bool
-	 */
-	static public function IsBasedOnOQLExpression() {return false;}
-	/**
-	 * Returns true if the attribute value can be shown as a string
-	 * @return bool
-	 */
-	static public function IsScalar() {return false;}
-	/**
-	 * Returns true if the attribute value is a set of related objects (1-N or N-N)
-	 * @return bool
-	 */
-	static public function IsLinkSet() {return false;}
-
-	/**
-	 * @param int $iType
-	 *
-	 * @return bool true if the attribute is an external key, either directly (RELATIVE to the host class), or indirectly (ABSOLUTELY)
-	 */
-	public function IsExternalKey($iType = EXTKEY_RELATIVE)
-	{
-		return false;
-	}
-	/**
-	 * @return bool true if the attribute value is an external key, pointing to the host class
-	 */
-	static public function IsHierarchicalKey() {return false;}
-	/**
-	 * @return bool true if the attribute value is stored on an object pointed to be an external key
-	 */
-	static public function IsExternalField() {return false;}
-	/**
-	 * @return bool true if the attribute can be written (by essence : metamodel field option)
-	 * @see \DBObject::IsAttributeReadOnlyForCurrentState() for a specific object instance (depending on its workflow)
-	 */
-	public function IsWritable() {return false;}
-	/**
-	 * @return bool true if the attribute has been added automatically by the framework
-	 */
-	public function IsMagic() {return $this->GetOptional('magic', false);}
-	/**
-	 * @return bool true if the attribute value is kept in the loaded object (in memory)
-	 */
-	static public function LoadInObject() {return true;}
-	/**
-	 * @return bool true if the attribute value comes from the database in one way or another
-	 */
-	static public function LoadFromDB() {return true;}
-	/**
-	 * @return bool true if the attribute should be loaded anytime (in addition to the column selected by the user)
-	 */
-	public function AlwaysLoadInTables() {return $this->GetOptional('always_load_in_tables', false);}
-
-	/**
-	 * @param \DBObject $oHostObject
-	 *
-	 * @return mixed Must return the value if LoadInObject returns false
-	 */
-	public function GetValue($oHostObject)
-	{
-		return null;
-	}
-
-	/**
-	 * Returns true if the attribute must not be stored if its current value is "null" (Cf. IsNull())
-	 * @return bool
-	 */
-	public function IsNullAllowed() {return true;}
-	/**
-	 * Returns the attribute code (identifies the attribute in the host class)
-	 * @return string
-	 */
-	public function GetCode() {return $this->m_sCode;}
-
-	/**
-	 * Find the corresponding "link" attribute on the target class, if any
-	 * @return null | AttributeDefinition
-	 */
-	public function GetMirrorLinkAttribute() {return null;}
-
-	/**
-	 * Helper to browse the hierarchy of classes, searching for a label
-	 *
-	 * @param string $sDictEntrySuffix
-	 * @param string $sDefault
-	 * @param bool $bUserLanguageOnly
-	 *
-	 * @return string
-	 * @throws \Exception
-	 */
-	protected function SearchLabel($sDictEntrySuffix, $sDefault, $bUserLanguageOnly)
-	{
-		$sLabel = Dict::S('Class:'.$this->m_sHostClass.$sDictEntrySuffix, '', $bUserLanguageOnly);
-		if (strlen($sLabel) == 0)
-		{
-			// Nothing found: go higher in the hierarchy (if possible)
-			//
-			$sLabel = $sDefault;
-			$sParentClass = MetaModel::GetParentClass($this->m_sHostClass);
-			if ($sParentClass)
-			{
-				if (MetaModel::IsValidAttCode($sParentClass, $this->m_sCode))
-				{
-					$oAttDef = MetaModel::GetAttributeDef($sParentClass, $this->m_sCode);
-					$sLabel = $oAttDef->SearchLabel($sDictEntrySuffix, $sDefault, $bUserLanguageOnly);
-				}
-			}
-		}
-		return $sLabel;
-	}
-
-    /**
-     * @param string|null $sDefault
-     *
-     * @return string
-     *
-     * @throws \Exception
-     */
-    public function GetLabel($sDefault = null)
-	{
-		$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode, null, true /*user lang*/);
-		if (is_null($sLabel))
-		{
-			// If no default value is specified, let's define the most relevant one for developping purposes
-			if (is_null($sDefault))
-			{
-				$sDefault = str_replace('_', ' ', $this->m_sCode);
-			}
-			// Browse the hierarchy again, accepting default (english) translations
-			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode, $sDefault, false);
-		}
-		return $sLabel;
-	}
-
-	/**
-	 * To be overloaded for localized enums
-	 *
-	 * @param string $sValue
-	 *
-	 * @return string label corresponding to the given value (in plain text)
-	 */
-	public function GetValueLabel($sValue)
-	{
-		return $sValue;
-	}
-
-	/**
-	 * Get the value from a given string (plain text, CSV import)
-	 *
-	 * @param string $sProposedValue
-	 * @param bool $bLocalizedValue
-	 * @param string $sSepItem
-	 * @param string $sSepAttribute
-	 * @param string $sSepValue
-	 * @param string $sAttributeQualifier
-	 *
-	 * @return mixed null if no match could be found
-	 */
-	public function MakeValueFromString(
-		$sProposedValue,
-		$bLocalizedValue = false,
-		$sSepItem = null,
-		$sSepAttribute = null,
-		$sSepValue = null,
-		$sAttributeQualifier = null
-	)
-	{
-		return $this->MakeRealValue($sProposedValue, null);
-	}
-
-	/**
-	 * Parses a search string coming from user input
-	 * @param string $sSearchString
-	 * @return string
-	 */
-	public function ParseSearchString($sSearchString)
-	{
-		return $sSearchString;
-	}
-
-    /**
-     * @return string
-     *
-     * @throws \Exception
-     */
-    public function GetLabel_Obsolete()
-	{
-		// Written for compatibility with a data model written prior to version 0.9.1
-		if (array_key_exists('label', $this->m_aParams))
-		{
-			return $this->m_aParams['label'];
-		}
-		else
-		{
-			return $this->GetLabel();
-		}
-	}
-
-    /**
-     * @param string|null $sDefault
-     *
-     * @return string
-     *
-     * @throws \Exception
-     */
-    public function GetDescription($sDefault = null)
-	{
-		$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'+', null, true /*user lang*/);
-		if (is_null($sLabel))
-		{
-			// If no default value is specified, let's define the most relevant one for developping purposes
-			if (is_null($sDefault))
-			{
-				$sDefault = '';
-			}
-			// Browse the hierarchy again, accepting default (english) translations
-			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'+', $sDefault, false);
-		}
-		return $sLabel;
-	}
-
-    /**
-     * @param string|null $sDefault
-     *
-     * @return string
-     *
-     * @throws \Exception
-     */
-    public function GetHelpOnEdition($sDefault = null)
-	{
-		$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'?', null, true /*user lang*/);
-		if (is_null($sLabel))
-		{
-			// If no default value is specified, let's define the most relevant one for developping purposes
-			if (is_null($sDefault))
-			{
-				$sDefault = '';
-			}
-			// Browse the hierarchy again, accepting default (english) translations
-			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'?', $sDefault, false);
-		}
-		return $sLabel;
-	} 
-
-	public function GetHelpOnSmartSearch()
-	{
-		$aParents = array_merge(array(get_class($this) => get_class($this)), class_parents($this));
-		foreach ($aParents as $sClass)
-		{
-			$sHelp = Dict::S("Core:$sClass?SmartSearch", '-missing-');
-			if ($sHelp != '-missing-')
-			{
-				return $sHelp;
-			}
-		} 
-		return '';
-	}
-
-    /**
-     * @return string
-     *
-     * @throws \Exception
-     */
-    public function GetDescription_Obsolete()
-	{
-		// Written for compatibility with a data model written prior to version 0.9.1
-		if (array_key_exists('description', $this->m_aParams))
-		{
-			return $this->m_aParams['description'];
-		}
-		else
-		{
-			return $this->GetDescription();
-		}
-	}
-
-	public function GetTrackingLevel()
-	{
-		return $this->GetOptional('tracking_level', ATTRIBUTE_TRACKING_ALL);
-	}
-
-	/**
-	 * @return \ValueSetObjects
-	 */
-	public function GetValuesDef() {return null;}
-
-	public function GetPrerequisiteAttributes($sClass = null)
-	{
-		return array();
-	}
-
-	public function GetNullValue() {return null;}
-
-	public function IsNull($proposedValue)
-	{
-		return is_null($proposedValue);
-	}
-
-	/**
-	 * force an allowed value (type conversion and possibly forces a value as mySQL would do upon writing!
-	 *
-	 * @param $proposedValue
-	 * @param $oHostObj
-	 *
-	 * @return mixed
-	 */
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		return $proposedValue;
-	}
-
-	public function Equals($val1, $val2) {return ($val1 == $val2);}
-
-	/**
-	 * @param string $sPrefix
-	 *
-	 * @return array suffix/expression pairs (1 in most of the cases), for READING (Select)
-	 */
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		return array();
-	}
-
-	/**
-	 * @param array $aCols
-	 * @param string $sPrefix
-	 *
-	 * @return mixed a value out of suffix/value pairs, for SELECT result interpretation
-	 */
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		return null;
-	}
-
-	/**
-	 * @param bool $bFullSpec
-	 *
-	 * @return array column/spec pairs (1 in most of the cases), for STRUCTURING (DB creation)
-	 * @see \CMDBSource::GetFieldSpec()
-	 */
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		return array();
-	}
-
-	/**
-	 * @param $value
-	 *
-	 * @return array column/value pairs (1 in most of the cases), for WRITING (Insert, Update)
-	 */
-	public function GetSQLValues($value)
-	{
-		return array();
-	}
-	public function RequiresIndex() {return false;}
-
-	public function RequiresFullTextIndex()
-	{
-		return false;
-	}
-	public function CopyOnAllTables() {return false;}
-
-	public function GetOrderBySQLExpressions($sClassAlias)
-	{
-		// Note: This is the responsibility of this function to place backticks around column aliases
-		return array('`'.$sClassAlias.$this->GetCode().'`');
-	}
-	
-	public function GetOrderByHint()
-	{
-		return '';
-	}
-
-   // Import - differs slightly from SQL input, but identical in most cases
-   //
-	public function GetImportColumns() {return $this->GetSQLColumns();}
-	public function FromImportToValue($aCols, $sPrefix = '')
-	{
-		$aValues = array();
-		foreach ($this->GetSQLExpressions($sPrefix) as $sAlias => $sExpr)
-		{
-			// This is working, based on the assumption that importable fields
-			// are not computed fields => the expression is the name of a column
-			$aValues[$sPrefix.$sAlias] = $aCols[$sExpr];
-		}
-		return $this->FromSQLToValue($aValues, $sPrefix);
-	}
-
-	public function GetValidationPattern()
-	{
-		return '';
-	}
-	
-	public function CheckFormat($value)
-	{
-		return true;
-	}
-	 
-	public function GetMaxSize()
-	{
-		return null;
-	}
-
-    /**
-     * @return mixed|null
-     * @deprecated never used
-     */
-	public function MakeValue()
-	{
-		$sComputeFunc = $this->Get("compute_func");
-		if (empty($sComputeFunc)) return null;
-
-		return call_user_func($sComputeFunc);
-	}
-	
-	abstract public function GetDefaultValue(DBObject $oHostObject = null);
-
-	//
-	// To be overloaded in subclasses
-	//
-	
-	abstract public function GetBasicFilterOperators(); // returns an array of "opCode"=>"description"
-	abstract public function GetBasicFilterLooseOperator(); // returns an "opCode"
-	//abstract protected GetBasicFilterHTMLInput();
-	abstract public function GetBasicFilterSQLExpr($sOpCode, $value); 
-
-	public function GetFilterDefinitions()
-	{
-		return array();
-	}
-
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		return (string)$sValue;
-	}
-
-	/**
-	 * For fields containing a potential markup, return the value without this markup
-	 *
-	 * @param string $sValue
-	 * @param \DBObject $oHostObj
-	 *
-	 * @return string
-	 */
-	public function GetAsPlainText($sValue, $oHostObj = null)
-	{
-		return (string) $this->GetEditValue($sValue, $oHostObj);
-	}
-
-	/**
-	 * Helper to get a value that will be JSON encoded
-	 * The operation is the opposite to FromJSONToValue
-	 *
-	 * @param $value
-	 *
-	 * @return string
-	 */
-	public function GetForJSON($value)
-	{
-		// In most of the cases, that will be the expected behavior...
-		return $this->GetEditValue($value);
-	}
-
-	/**
-	 * Helper to form a value, given JSON decoded data
-	 * The operation is the opposite to GetForJSON
-	 *
-	 * @param $json
-	 *
-	 * @return mixed
-	 */
-	public function FromJSONToValue($json)
-	{
-		// Passthrough in most of the cases
-		return $json;
-	}
-
-	/**
-	 * Override to display the value in the GUI
-	 *
-	 * @param string $sValue
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 *
-	 * @return string
-	 */
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		return Str::pure2html((string)$sValue);
-	}
-
-	/**
-	 * Override to export the value in XML
-	 *
-	 * @param string $sValue
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 *
-	 * @return mixed
-	 */
-	public function GetAsXML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		return Str::pure2xml((string)$sValue);
-	}
-
-	/**
-	 * Override to escape the value when read by DBObject::GetAsCSV()
-	 *
-	 * @param string $sValue
-	 * @param string $sSeparator
-	 * @param string $sTextQualifier
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 * @param bool $bConvertToPlainText
-	 *
-	 * @return string
-	 */
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		return (string)$sValue;
-	}
-
-	/**
-	 * Override to differentiate a value displayed in the UI or in the history
-	 *
-	 * @param string $sValue
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 *
-	 * @return string
-	 */
-	public function GetAsHTMLForHistory($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		return $this->GetAsHTML($sValue, $oHostObject, $bLocalize);
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\StringField';
-	}
-
-	/**
-	 * Override to specify Field class
-	 *
-	 * When called first, $oFormField is null and will be created (eg. Make). Then when the ::parent is called and the $oFormField is
-	 * passed, MakeFormField behave more like a Prepare.
-	 *
-	 * @param \DBObject $oObject
-	 * @param \Combodo\iTop\Form\Field\Field $oFormField
-	 *
-	 * @return null
-	 * @throws \CoreException
-	 * @throws \Exception
-	 */
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		// This is a fallback in case the AttributeDefinition subclass has no overloading of this function.
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-			//$oFormField->SetReadOnly(true);
-		}
-
-		$oFormField->SetLabel($this->GetLabel());
-
-		// Attributes flags
-		// - Retrieving flags for the current object
-		if ($oObject->IsNew())
-		{
-			$iFlags = $oObject->GetInitialStateAttributeFlags($this->GetCode());
-		}
-		else
-		{
-			$iFlags = $oObject->GetAttributeFlags($this->GetCode());
-		}
-
-		// - Comparing flags
-		if ($this->IsWritable() && (!$this->IsNullAllowed() || (($iFlags & OPT_ATT_MANDATORY) === OPT_ATT_MANDATORY)))
-		{
-			$oFormField->SetMandatory(true);
-		}
-		if ((!$oObject->IsNew() || !$oFormField->GetMandatory()) && (($iFlags & OPT_ATT_READONLY) === OPT_ATT_READONLY))
-		{
-			$oFormField->SetReadOnly(true);
-		}
-		
-		// CurrentValue
-		$oFormField->SetCurrentValue($oObject->Get($this->GetCode()));
-
-		// Validation pattern
-		if ($this->GetValidationPattern() !== '')
-		{
-			$oFormField->AddValidator(new \Combodo\iTop\Form\Validator\Validator($this->GetValidationPattern()));
-		}
-
-		return $oFormField;
-	}
-
-	/**
-	 * List the available verbs for 'GetForTemplate'
-	 */	 
-	public function EnumTemplateVerbs()
-	{
-		return array(
-			'' => 'Plain text (unlocalized) representation',
-			'html' => 'HTML representation',
-			'label' => 'Localized representation',
-			'text' => 'Plain text representation (without any markup)',
-		);
-	}
-
-	/**
-	 * Get various representations of the value, for insertion into a template (e.g. in Notifications)
-	 *
-	 * @param mixed $value The current value of the field
-	 * @param string $sVerb The verb specifying the representation of the value
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize Whether or not to localize the value
-	 *
-	 * @return mixed|null|string
-     *
-	 * @throws \Exception
-	 */
-	public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
-	{
-		if ($this->IsScalar())
-		{
-			switch ($sVerb)
-			{
-				case '':
-				return $value;
-				
-				case 'html':
-				return $this->GetAsHtml($value, $oHostObject, $bLocalize);
-				
-				case 'label':
-				return $this->GetEditValue($value);
-				
-				case 'text':
-				return $this->GetAsPlainText($value);
-				break;
-				
-				default:
-				throw new Exception("Unknown verb '$sVerb' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
-			}
-		}
-		return null;
-	}
-
-	/**
-	 * @param array $aArgs
-	 * @param string $sContains
-	 *
-	 * @return array|null
-	 * @throws \CoreException
-	 * @throws \OQLException
-	 */
-	public function GetAllowedValues($aArgs = array(), $sContains = '')
-	{
-		$oValSetDef = $this->GetValuesDef();
-		if (!$oValSetDef) return null;
-		return $oValSetDef->GetValues($aArgs, $sContains);
-	}
-
-	/**
-	 * Explain the change of the attribute (history)
-	 *
-	 * @param string $sOldValue
-	 * @param string $sNewValue
-	 * @param string $sLabel
-	 *
-	 * @return string
-	 * @throws \ArchivedObjectException
-	 * @throws \CoreException
-	 * @throws \DictExceptionMissingString
-	 * @throws \OQLException
-	 * @throws \Exception
-	 */
-	public function DescribeChangeAsHTML($sOldValue, $sNewValue, $sLabel = null)
-	{
-		if (is_null($sLabel))
-		{
-			$sLabel = $this->GetLabel();
-		}
-
-		$sNewValueHtml = $this->GetAsHTMLForHistory($sNewValue);
-		$sOldValueHtml = $this->GetAsHTMLForHistory($sOldValue);
-
-		if($this->IsExternalKey())
-		{
-			/** @var \AttributeExternalKey $this */
-			$sTargetClass = $this->GetTargetClass();
-			$sOldValueHtml = (int)$sOldValue ? MetaModel::GetHyperLink($sTargetClass, (int)$sOldValue) : null;
-			$sNewValueHtml = (int)$sNewValue ? MetaModel::GetHyperLink($sTargetClass, (int)$sNewValue) : null;
-		}
-		if ( (($this->GetType() == 'String') || ($this->GetType() == 'Text')) &&
-			 (strlen($sNewValue) > strlen($sOldValue)) )
-		{
-			// Check if some text was not appended to the field
-			if (substr($sNewValue,0, strlen($sOldValue)) == $sOldValue) // Text added at the end
-			{
-				$sDelta = $this->GetAsHTML(substr($sNewValue, strlen($sOldValue)));
-				$sResult = Dict::Format('Change:Text_AppendedTo_AttName', $sDelta, $sLabel);
-			}
-			else if (substr($sNewValue, -strlen($sOldValue)) == $sOldValue)   // Text added at the beginning
-			{
-				$sDelta = $this->GetAsHTML(substr($sNewValue, 0, strlen($sNewValue) - strlen($sOldValue)));
-				$sResult = Dict::Format('Change:Text_AppendedTo_AttName', $sDelta, $sLabel);
-			}
-			else
-			{
-				if (strlen($sOldValue) == 0)
-				{
-					$sResult = Dict::Format('Change:AttName_SetTo', $sLabel, $sNewValueHtml);
-				}
-				else
-				{
-					if (is_null($sNewValue))
-					{
-						$sNewValueHtml = Dict::S('UI:UndefinedObject');
-					}
-					$sResult = Dict::Format('Change:AttName_SetTo_NewValue_PreviousValue_OldValue', $sLabel, $sNewValueHtml, $sOldValueHtml);
-				}
-			}
-		}
-		else
-		{
-			if (strlen($sOldValue) == 0)
-			{
-				$sResult = Dict::Format('Change:AttName_SetTo', $sLabel, $sNewValueHtml);
-			}
-			else
-			{
-				if (is_null($sNewValue))
-				{
-					$sNewValueHtml = Dict::S('UI:UndefinedObject');
-				}
-				$sResult = Dict::Format('Change:AttName_SetTo_NewValue_PreviousValue_OldValue', $sLabel, $sNewValueHtml, $sOldValueHtml);
-			}
-		}
-		return $sResult;
-	}
-
-
-    /**
-     * Parses a string to find some smart search patterns and build the corresponding search/OQL condition
-     * Each derived class is reponsible for defining and processing their own smart patterns, the base class
-     * does nothing special, and just calls the default (loose) operator
-     *
-     * @param string $sSearchText The search string to analyze for smart patterns
-     * @param \FieldExpression $oField
-     * @param array $aParams Values of the query parameters
-     *
-     * @return \Expression The search condition to be added (AND) to the current search
-     *
-     * @throws \CoreException
-     */
-	public function GetSmartConditionExpression($sSearchText, FieldExpression $oField, &$aParams)
-	{
-		$sParamName = $oField->GetParent().'_'.$oField->GetName();
-		$oRightExpr = new VariableExpression($sParamName);
-		$sOperator = $this->GetBasicFilterLooseOperator();
-		switch ($sOperator)
-		{
-			case 'Contains':
-			$aParams[$sParamName] = "%$sSearchText%";
-			$sSQLOperator = 'LIKE';
-			break;
-			
-			default:
-			$sSQLOperator = $sOperator;
-			$aParams[$sParamName] = $sSearchText;
-		}
-		$oNewCondition = new BinaryExpression($oField, $sSQLOperator, $oRightExpr);
-		return $oNewCondition;
-	}
-	
-	/**
-	 * Tells if an attribute is part of the unique fingerprint of the object (used for comparing two objects)
-	 * All attributes which value is not based on a value from the object itself (like ExternalFields or LinkedSet)
-	 * must be excluded from the object's signature
-	 * @return boolean
-	 */
-	public function IsPartOfFingerprint()
-	{
-		return true;
-	}
-	
-	/**
-	 * The part of the current attribute in the object's signature, for the supplied value
-	 * @param mixed $value The value of this attribute for the object
-	 * @return string The "signature" for this field/attribute
-	 */
-	public function Fingerprint($value)
-	{
-		return (string)$value;
-	}
-}
-
-/**
- * Set of objects directly linked to an object, and being part of its definition  
- *
- * @package	 iTopORM
- */
-class AttributeLinkedSet extends AttributeDefinition
-{
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("allowed_values", "depends_on", "linked_class", "ext_key_to_me", "count_min", "count_max"));
-	}
-
-	public function GetEditClass() {return "LinkedSet";}
-
-	public function IsWritable() {return true;}
-	static public function IsLinkSet() {return true;}
-	public function IsIndirect() {return false;} 
-
-	public function GetValuesDef() {return $this->Get("allowed_values");} 
-	public function GetPrerequisiteAttributes($sClass = null) {return $this->Get("depends_on");}
-
-    /**
-     * @param \DBObject|null $oHostObject
-     *
-     * @return \ormLinkSet
-     *
-     * @throws \Exception
-     * @throws \CoreException
-     * @throws \CoreWarning
-     */
-    public function GetDefaultValue(DBObject $oHostObject = null)
-	{
-		$sLinkClass = $this->GetLinkedClass();
-		$sExtKeyToMe = $this->GetExtKeyToMe();
-
-		// The class to target is not the current class, because if this is a derived class,
-		// it may differ from the target class, then things start to become confusing
-		/** @var \AttributeExternalKey $oRemoteExtKeyAtt */
-		$oRemoteExtKeyAtt = MetaModel::GetAttributeDef($sLinkClass, $sExtKeyToMe);
-		$sMyClass = $oRemoteExtKeyAtt->GetTargetClass();
-
-		$oMyselfSearch = new DBObjectSearch($sMyClass);
-		if ($oHostObject !== null)
-		{
-			$oMyselfSearch->AddCondition('id', $oHostObject->GetKey(), '=');
-		}
-
-		$oLinkSearch = new DBObjectSearch($sLinkClass);
-		$oLinkSearch->AddCondition_PointingTo($oMyselfSearch, $sExtKeyToMe);
-		if ($this->IsIndirect())
-		{
-			// Join the remote class so that the archive flag will be taken into account
-			/** @var \AttributeLinkedSetIndirect $this */
-			$sExtKeyToRemote = $this->GetExtKeyToRemote();
-			/** @var \AttributeExternalKey $oExtKeyToRemote */
-			$oExtKeyToRemote = MetaModel::GetAttributeDef($sLinkClass, $sExtKeyToRemote);
-			$sRemoteClass = $oExtKeyToRemote->GetTargetClass();
-			if (MetaModel::IsArchivable($sRemoteClass))
-			{
-				$oRemoteSearch = new DBObjectSearch($sRemoteClass);
-				/** @var \AttributeLinkedSetIndirect $this */
-				$oLinkSearch->AddCondition_PointingTo($oRemoteSearch, $this->GetExtKeyToRemote());
-			}
-		}
-		$oLinks = new DBObjectSet($oLinkSearch);
-		$oLinkSet = new ormLinkSet($this->GetHostClass(), $this->GetCode(), $oLinks);
-		return $oLinkSet;
-	}
-
-	public function GetTrackingLevel()
-	{
-		return $this->GetOptional('tracking_level', MetaModel::GetConfig()->Get('tracking_level_linked_set_default'));
-	}
-
-	public function GetEditMode()
-	{
-		return $this->GetOptional('edit_mode', LINKSET_EDITMODE_ACTIONS);
-	}
-	
-	public function GetLinkedClass() {return $this->Get('linked_class');}
-	public function GetExtKeyToMe() {return $this->Get('ext_key_to_me');}
-
-	public function GetBasicFilterOperators() {return array();}
-	public function GetBasicFilterLooseOperator() {return '';}
-	public function GetBasicFilterSQLExpr($sOpCode, $value) {return '';}
-
-    /**
-     * @param string $sValue
-     * @param \DBObject $oHostObject
-     * @param bool $bLocalize
-     *
-     * @return string|null
-     *
-     * @throws \CoreException
-     */
-    public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		if (is_object($sValue) && ($sValue instanceof ormLinkSet))
-		{
-			$sValue->Rewind();
-			$aItems = array();
-			while ($oObj = $sValue->Fetch())
-			{
-				// Show only relevant information (hide the external key to the current object)
-				$aAttributes = array();
-				foreach(MetaModel::ListAttributeDefs($this->GetLinkedClass()) as $sAttCode => $oAttDef)
-				{
-					if ($sAttCode == $this->GetExtKeyToMe()) continue;
-					if ($oAttDef->IsExternalField()) continue;
-					$sAttValue = $oObj->GetAsHTML($sAttCode);
-					if (strlen($sAttValue) > 0)
-					{
-						$aAttributes[] = $sAttValue;
-					}
-				}
-				$sAttributes = implode(', ', $aAttributes);
-				$aItems[] = $sAttributes;
-			}
-			return implode('<br/>', $aItems);
-		}
-		return null;
-	}
-
-    /**
-     * @param string $sValue
-     * @param \DBObject $oHostObject
-     * @param bool $bLocalize
-     *
-     * @return string
-     *
-     * @throws \CoreException
-     */
-    public function GetAsXML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		if (is_object($sValue) && ($sValue instanceof ormLinkSet))
-		{
-			$sValue->Rewind();
-			$sRes = "<Set>\n";
-			while ($oObj = $sValue->Fetch())
-			{
-				$sObjClass = get_class($oObj);
-				$sRes .= "<$sObjClass id=\"".$oObj->GetKey()."\">\n";
-				// Show only relevant information (hide the external key to the current object)
-				foreach(MetaModel::ListAttributeDefs($sObjClass) as $sAttCode => $oAttDef)
-				{
-					if ($sAttCode == 'finalclass')
-					{
-						if ($sObjClass == $this->GetLinkedClass())
-						{
-							// Simplify the output if the exact class could be determined implicitely
-							continue;
-						}
-					}
-					if ($sAttCode == $this->GetExtKeyToMe()) continue;
-					if ($oAttDef->IsExternalField())
-					{
-						/** @var \AttributeExternalField $oAttDef */
-						if ($oAttDef->GetKeyAttCode() == $this->GetExtKeyToMe()) continue;
-						/** @var AttributeExternalField $oAttDef */
-						if ($oAttDef->IsFriendlyName()) continue;
-					}
-					if ($oAttDef instanceof AttributeFriendlyName) continue;
-					if (!$oAttDef->IsScalar()) continue;
-					$sAttValue = $oObj->GetAsXML($sAttCode, $bLocalize);
-					$sRes .= "<$sAttCode>$sAttValue</$sAttCode>\n";
-				}
-				$sRes .= "</$sObjClass>\n";
-			}
-			$sRes .= "</Set>\n";
-		}
-		else
-		{
-			$sRes = '';
-		}
-		return $sRes;
-	}
-
-	/**
-	 * @param $sValue
-	 * @param string $sSeparator
-	 * @param string $sTextQualifier
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 * @param bool $bConvertToPlainText
-	 *
-	 * @return mixed|string
-	 * @throws \CoreException
-	 */
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		$sSepItem = MetaModel::GetConfig()->Get('link_set_item_separator');
-		$sSepAttribute = MetaModel::GetConfig()->Get('link_set_attribute_separator');
-		$sSepValue = MetaModel::GetConfig()->Get('link_set_value_separator');
-		$sAttributeQualifier = MetaModel::GetConfig()->Get('link_set_attribute_qualifier');
-
-		if (is_object($sValue) && ($sValue instanceof ormLinkSet))
-		{
-			$sValue->Rewind();
-			$aItems = array();
-			while ($oObj = $sValue->Fetch())
-			{
-				$sObjClass = get_class($oObj);
-				// Show only relevant information (hide the external key to the current object)
-				$aAttributes = array();
-				foreach(MetaModel::ListAttributeDefs($sObjClass) as $sAttCode => $oAttDef)
-				{
-					if ($sAttCode == 'finalclass')
-					{
-						if ($sObjClass == $this->GetLinkedClass())
-						{
-							// Simplify the output if the exact class could be determined implicitely 
-							continue;
-						}
-					}
-					if ($sAttCode == $this->GetExtKeyToMe()) continue;
-					if ($oAttDef->IsExternalField()) continue;
-					if (!$oAttDef->IsBasedOnDBColumns()) continue;
-					if (!$oAttDef->IsScalar()) continue;
-					$sAttValue = $oObj->GetAsCSV($sAttCode, $sSepValue, '', $bLocalize);
-					if (strlen($sAttValue) > 0)
-					{
-						$sAttributeData = str_replace($sAttributeQualifier, $sAttributeQualifier.$sAttributeQualifier, $sAttCode.$sSepValue.$sAttValue);
-						$aAttributes[] = $sAttributeQualifier.$sAttributeData.$sAttributeQualifier;
-					}
-				}
-				$sAttributes = implode($sSepAttribute, $aAttributes);
-				$aItems[] = $sAttributes;
-			}
-			$sRes = implode($sSepItem, $aItems);
-		}
-		else
-		{
-			$sRes = '';
-		}
-		$sRes = str_replace($sTextQualifier, $sTextQualifier.$sTextQualifier, $sRes);
-		$sRes = $sTextQualifier.$sRes.$sTextQualifier;
-		return $sRes;
-	}
-
-	/**
-	 * List the available verbs for 'GetForTemplate'
-	 */	 
-	public function EnumTemplateVerbs()
-	{
-		return array(
-			'' => 'Plain text (unlocalized) representation',
-			'html' => 'HTML representation (unordered list)',
-		);
-	}
-
-	/**
-	 * Get various representations of the value, for insertion into a template (e.g. in Notifications)
-	 *
-	 * @param mixed $value The current value of the field
-	 * @param string $sVerb The verb specifying the representation of the value
-	 * @param DBObject $oHostObject The object
-	 * @param bool $bLocalize Whether or not to localize the value
-	 *
-	 * @return string
-	 * @throws \Exception
-	 */
-	public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
-	{
-		$sRemoteName = $this->IsIndirect() ?
-			/** @var \AttributeLinkedSetIndirect $this */
-			$this->GetExtKeyToRemote().'_friendlyname' : 'friendlyname';
-
-		$oLinkSet = clone $value; // Workaround/Safety net for Trac #887
-		$iLimit = MetaModel::GetConfig()->Get('max_linkset_output');
-		$iCount = 0;
-		$aNames = array();
-		foreach($oLinkSet as $oItem)
-		{
-			if (($iLimit > 0) && ($iCount == $iLimit))
-			{
-				$iTotal = $oLinkSet->Count();
-				$aNames[] = '... '.Dict::Format('UI:TruncatedResults', $iCount, $iTotal);
-				break;
-			}
-			$aNames[] = $oItem->Get($sRemoteName);
-			$iCount++;
-		}
-
-		switch($sVerb)
-		{
-			case '':
-			return implode("\n", $aNames);
-					
-			case 'html':
-			return '<ul><li>'.implode("</li><li>", $aNames).'</li></ul>';
-			
-			default:
-			throw new Exception("Unknown verb '$sVerb' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
-		}
-	}
-
-	public function DuplicatesAllowed() {return false;} // No duplicates for 1:n links, never
-
-	public function GetImportColumns()
-	{
-		$aColumns = array();
-		$aColumns[$this->GetCode()] = 'TEXT';
-		return $aColumns;
-	}
-
-	/**
-	 * @param string $sProposedValue
-	 * @param bool $bLocalizedValue
-	 * @param string $sSepItem
-	 * @param string $sSepAttribute
-	 * @param string $sSepValue
-	 * @param string $sAttributeQualifier
-	 *
-	 * @return \DBObjectSet|mixed
-	 * @throws \CSVParserException
-	 * @throws \CoreException
-	 * @throws \CoreUnexpectedValue
-	 * @throws \MissingQueryArgument
-	 * @throws \MySQLException
-	 * @throws \MySQLHasGoneAwayException
-	 * @throws \Exception
-	 */
-	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
-	{
-		if (is_null($sSepItem) || empty($sSepItem))
-		{
-			$sSepItem = MetaModel::GetConfig()->Get('link_set_item_separator');
-		}
-		if (is_null($sSepAttribute) || empty($sSepAttribute))
-		{
-			$sSepAttribute = MetaModel::GetConfig()->Get('link_set_attribute_separator');
-		}
-		if (is_null($sSepValue) || empty($sSepValue))
-		{
-			$sSepValue = MetaModel::GetConfig()->Get('link_set_value_separator');
-		}
-		if (is_null($sAttributeQualifier) || empty($sAttributeQualifier))
-		{
-			$sAttributeQualifier = MetaModel::GetConfig()->Get('link_set_attribute_qualifier');
-		}
-
-		$sTargetClass = $this->Get('linked_class');
-
-		$sInput = str_replace($sSepItem, "\n", $sProposedValue);
-		$oCSVParser = new CSVParser($sInput, $sSepAttribute, $sAttributeQualifier);
-
-		$aInput = $oCSVParser->ToArray(0 /* do not skip lines */);
-
-		$aLinks = array();
-		foreach($aInput as $aRow)
-		{
-			// 1st - get the values, split the extkey->searchkey specs, and eventually get the finalclass value
-			$aExtKeys = array();
-			$aValues = array();
-			foreach($aRow as $sCell)
-			{
-				$iSepPos = strpos($sCell, $sSepValue);
-				if ($iSepPos === false)
-				{
-					// Houston...
-					throw new CoreException('Wrong format for link attribute specification', array('value' => $sCell));
-				}
-
-				$sAttCode = trim(substr($sCell, 0, $iSepPos));
-				$sValue = substr($sCell, $iSepPos + strlen($sSepValue));
-
-				if (preg_match('/^(.+)->(.+)$/', $sAttCode, $aMatches))
-				{
-					$sKeyAttCode = $aMatches[1];
-					$sRemoteAttCode = $aMatches[2];
-					$aExtKeys[$sKeyAttCode][$sRemoteAttCode] = $sValue;
-					if (!MetaModel::IsValidAttCode($sTargetClass, $sKeyAttCode))
-					{
-						throw new CoreException('Wrong attribute code for link attribute specification', array('class' => $sTargetClass, 'attcode' => $sKeyAttCode));
-					}
-					/** @var \AttributeExternalKey $oKeyAttDef */
-					$oKeyAttDef = MetaModel::GetAttributeDef($sTargetClass, $sKeyAttCode);
-					$sRemoteClass = $oKeyAttDef->GetTargetClass();
-					if (!MetaModel::IsValidAttCode($sRemoteClass, $sRemoteAttCode))
-					{
-						throw new CoreException('Wrong attribute code for link attribute specification', array('class' => $sRemoteClass, 'attcode' => $sRemoteAttCode));
-					}
-				}
-				else
-				{
-					if(!MetaModel::IsValidAttCode($sTargetClass, $sAttCode))
-					{
-						throw new CoreException('Wrong attribute code for link attribute specification', array('class' => $sTargetClass, 'attcode' => $sAttCode));
-					}
-					$oAttDef = MetaModel::GetAttributeDef($sTargetClass, $sAttCode);
-					$aValues[$sAttCode] = $oAttDef->MakeValueFromString($sValue, $bLocalizedValue, $sSepItem, $sSepAttribute, $sSepValue, $sAttributeQualifier);
-				}
-			}
-
-			// 2nd - Instanciate the object and set the value
-			if (isset($aValues['finalclass']))
-			{
-				$sLinkClass = $aValues['finalclass'];
-				if (!is_subclass_of($sLinkClass, $sTargetClass))
-				{
-					throw new CoreException('Wrong class for link attribute specification', array('requested_class' => $sLinkClass, 'expected_class' => $sTargetClass));
-				}
-			}
-			elseif (MetaModel::IsAbstract($sTargetClass))
-			{
-					throw new CoreException('Missing finalclass for link attribute specification');
-			}
-			else
-			{
-				$sLinkClass = $sTargetClass;
-			}
-
-			$oLink = MetaModel::NewObject($sLinkClass);
-			foreach ($aValues as $sAttCode => $sValue)
-			{
-				$oLink->Set($sAttCode, $sValue);
-			}
-
-			// 3rd - Set external keys from search conditions
-			foreach ($aExtKeys as $sKeyAttCode => $aReconciliation)
-			{
-				$oKeyAttDef = MetaModel::GetAttributeDef($sTargetClass, $sKeyAttCode);
-				$sKeyClass = $oKeyAttDef->GetTargetClass();
-				$oExtKeyFilter = new DBObjectSearch($sKeyClass);
-				$aReconciliationDesc = array();
-				foreach($aReconciliation as $sRemoteAttCode => $sValue)
-				{
-					$oExtKeyFilter->AddCondition($sRemoteAttCode, $sValue, '=');
-					$aReconciliationDesc[] = "$sRemoteAttCode=$sValue";
-				}
-				$oExtKeySet = new DBObjectSet($oExtKeyFilter);
-				switch($oExtKeySet->Count())
-				{
-				case 0:
-					$sReconciliationDesc = implode(', ', $aReconciliationDesc);
-					throw new CoreException("Found no match", array('ext_key' => $sKeyAttCode, 'reconciliation' => $sReconciliationDesc));
-					break;
-				case 1:
-					$oRemoteObj = $oExtKeySet->Fetch();
-					$oLink->Set($sKeyAttCode, $oRemoteObj->GetKey());
-					break;
-				default:
-					$sReconciliationDesc = implode(', ', $aReconciliationDesc);
-					throw new CoreException("Found several matches", array('ext_key' => $sKeyAttCode, 'reconciliation' => $sReconciliationDesc));
-					// Found several matches, ambiguous
-				}
-			}
-
-			// Check (roughly) if such a link is valid
-			$aErrors = array();
-			foreach(MetaModel::ListAttributeDefs($sTargetClass) as $sAttCode => $oAttDef)
-			{
-				if ($oAttDef->IsExternalKey())
-				{
-					/** @var \AttributeExternalKey $oAttDef */
-					if (($oAttDef->GetTargetClass() == $this->GetHostClass()) || (is_subclass_of($this->GetHostClass(), $oAttDef->GetTargetClass())))
-					{
-						continue; // Don't check the key to self
-					}
-				}
-				
-				if ($oAttDef->IsWritable() && $oAttDef->IsNull($oLink->Get($sAttCode)) && !$oAttDef->IsNullAllowed())
-				{
-					$aErrors[] = $sAttCode;
-				}
-			}
-			if (count($aErrors) > 0)
-			{
-				throw new CoreException("Missing value for mandatory attribute(s): ".implode(', ', $aErrors));
-			}
-
-			$aLinks[] = $oLink;
-		}
-		$oSet = DBObjectSet::FromArray($sTargetClass, $aLinks);
-		return $oSet;
-	}
-
-	/**
-	 * Helper to get a value that will be JSON encoded
-	 * The operation is the opposite to FromJSONToValue
-	 *
-	 * @param \ormLinkSet $value
-	 *
-	 * @return array
-	 * @throws \CoreException
-	 */
-	public function GetForJSON($value)
-	{
-		$aRet = array();
-		if (is_object($value) && ($value instanceof ormLinkSet))
-		{
-			$value->Rewind();
-			while ($oObj = $value->Fetch())
-			{
-				$sObjClass = get_class($oObj);
-				// Show only relevant information (hide the external key to the current object)
-				$aAttributes = array();
-				foreach(MetaModel::ListAttributeDefs($sObjClass) as $sAttCode => $oAttDef)
-				{
-					if ($sAttCode == 'finalclass')
-					{
-						if ($sObjClass == $this->GetLinkedClass())
-						{
-							// Simplify the output if the exact class could be determined implicitely 
-							continue;
-						}
-					}
-					if ($sAttCode == $this->GetExtKeyToMe()) continue;
-					if ($oAttDef->IsExternalField()) continue;
-					if (!$oAttDef->IsBasedOnDBColumns()) continue;
-					if (!$oAttDef->IsScalar()) continue;
-					$attValue = $oObj->Get($sAttCode);
-					$aAttributes[$sAttCode] = $oAttDef->GetForJSON($attValue);
-				}
-				$aRet[] = $aAttributes;
-			}
-		}
-		return $aRet;
-	}
-
-	/**
-	 * Helper to form a value, given JSON decoded data
-	 * The operation is the opposite to GetForJSON
-	 *
-	 * @param $json
-	 *
-	 * @return \DBObjectSet
-	 * @throws \CoreException
-	 * @throws \CoreUnexpectedValue
-	 * @throws \Exception
-	 */
-	public function FromJSONToValue($json)
-	{
-		$sTargetClass = $this->Get('linked_class');
-
-		$aLinks = array();
-		foreach($json as $aValues)
-		{
-			if (isset($aValues['finalclass']))
-			{
-				$sLinkClass = $aValues['finalclass'];
-				if (!is_subclass_of($sLinkClass, $sTargetClass))
-				{
-					throw new CoreException('Wrong class for link attribute specification', array('requested_class' => $sLinkClass, 'expected_class' => $sTargetClass));
-				}
-			}
-			elseif (MetaModel::IsAbstract($sTargetClass))
-			{
-					throw new CoreException('Missing finalclass for link attribute specification');
-			}
-			else
-			{
-				$sLinkClass = $sTargetClass;
-			}
-
-			$oLink = MetaModel::NewObject($sLinkClass);
-			foreach ($aValues as $sAttCode => $sValue)
-			{
-				$oLink->Set($sAttCode, $sValue);
-			}
-
-			// Check (roughly) if such a link is valid
-			$aErrors = array();
-			foreach(MetaModel::ListAttributeDefs($sTargetClass) as $sAttCode => $oAttDef)
-			{
-				if ($oAttDef->IsExternalKey())
-				{
-					/** @var AttributeExternalKey $oAttDef */
-					if (($oAttDef->GetTargetClass() == $this->GetHostClass()) || (is_subclass_of($this->GetHostClass(), $oAttDef->GetTargetClass())))
-					{
-						continue; // Don't check the key to self
-					}
-				}
-				
-				if ($oAttDef->IsWritable() && $oAttDef->IsNull($oLink->Get($sAttCode)) && !$oAttDef->IsNullAllowed())
-				{
-					$aErrors[] = $sAttCode;
-				}
-			}
-			if (count($aErrors) > 0)
-			{
-				throw new CoreException("Missing value for mandatory attribute(s): ".implode(', ', $aErrors));
-			}
-
-			$aLinks[] = $oLink;
-		}
-		$oSet = DBObjectSet::FromArray($sTargetClass, $aLinks);
-		return $oSet;
-	}
-
-	/**
-	 * @param $proposedValue
-	 * @param $oHostObj
-	 *
-	 * @return mixed
-	 * @throws \Exception
-	 */
-    public function MakeRealValue($proposedValue, $oHostObj){
-        if($proposedValue === null)
-        {
-            $sLinkedClass = $this->GetLinkedClass();
-            $aLinkedObjectsArray = array();
-            $oSet = DBObjectSet::FromArray($sLinkedClass, $aLinkedObjectsArray);
-
-            return new ormLinkSet(
-                get_class($oHostObj),
-                $this->GetCode(),
-                $oSet
-            );
-        }
-
-        return $proposedValue;
-    }
-
-	/**
-	 * @param ormLinkSet $val1
-	 * @param ormLinkSet $val2
-	 * @return bool
-	 */
-	public function Equals($val1, $val2)
-	{
-		if ($val1 === $val2)
-		{
-			$bAreEquivalent = true;
-		}
-		else
-		{
-            $bAreEquivalent = ($val2->HasDelta() === false);
-		}
-		return $bAreEquivalent;
-	}
-
-	/**
-	 * Find the corresponding "link" attribute on the target class, if any
-	 *
-	 * @return null | AttributeDefinition
-	 * @throws \Exception
-	 */
-	public function GetMirrorLinkAttribute()
-	{
-		$oRemoteAtt = MetaModel::GetAttributeDef($this->GetLinkedClass(), $this->GetExtKeyToMe());
-		return $oRemoteAtt;
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\LinkedSetField';
-	}
-
-	/**
-	 * @param \DBObject $oObject
-	 * @param \Combodo\iTop\Form\Field\LinkedSetField $oFormField
-	 *
-	 * @return \Combodo\iTop\Form\Field\LinkedSetField
-	 * @throws \CoreException
-	 * @throws \DictExceptionMissingString
-	 * @throws \Exception
-	 */
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-		
-		// Setting target class
-		if (!$this->IsIndirect())
-		{
-			$sTargetClass = $this->GetLinkedClass();
-		}
-		else
-		{
-			/** @var \AttributeExternalKey $oRemoteAttDef */
-			/** @var \AttributeLinkedSetIndirect $this */
-			$oRemoteAttDef = MetaModel::GetAttributeDef($this->GetLinkedClass(), $this->GetExtKeyToRemote());
-			$sTargetClass = $oRemoteAttDef->GetTargetClass();
-
-			/** @var \AttributeLinkedSetIndirect $this */
-			$oFormField->SetExtKeyToRemote($this->GetExtKeyToRemote());
-		}
-		$oFormField->SetTargetClass($sTargetClass);
-		$oFormField->SetIndirect($this->IsIndirect());
-		// Setting attcodes to display
-		$aAttCodesToDisplay = MetaModel::FlattenZList(MetaModel::GetZListItems($sTargetClass, 'list'));
-		// - Adding friendlyname attribute to the list is not already in it
-		$sTitleAttCode = MetaModel::GetFriendlyNameAttributeCode($sTargetClass);
-		if (($sTitleAttCode !== null) && !in_array($sTitleAttCode, $aAttCodesToDisplay))
-		{
-			$aAttCodesToDisplay = array_merge(array($sTitleAttCode), $aAttCodesToDisplay);
-		}
-		// - Adding attribute labels
-		$aAttributesToDisplay = array();
-		foreach ($aAttCodesToDisplay as $sAttCodeToDisplay)
-		{
-			$oAttDefToDisplay = MetaModel::GetAttributeDef($sTargetClass, $sAttCodeToDisplay);
-			$aAttributesToDisplay[$sAttCodeToDisplay] = $oAttDefToDisplay->GetLabel();
-		}
-		$oFormField->SetAttributesToDisplay($aAttributesToDisplay);
-		
-		parent::MakeFormField($oObject, $oFormField);
-		
-		return $oFormField;
-	}
-
-	public function IsPartOfFingerprint() { return false; }
-}
-
-/**
- * Set of objects linked to an object (n-n), and being part of its definition  
- *
- * @package	 iTopORM
- */
-class AttributeLinkedSetIndirect extends AttributeLinkedSet
-{
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("ext_key_to_remote"));
-	}
-
-	public function IsIndirect()
-	{
-		return true;
-	}
-
-	public function GetExtKeyToRemote() { return $this->Get('ext_key_to_remote'); }
-	public function GetEditClass() {return "LinkedSet";}
-	public function DuplicatesAllowed() {return $this->GetOptional("duplicates", false);} // The same object may be linked several times... or not...
-
-	public function GetTrackingLevel()
-	{
-		return $this->GetOptional('tracking_level', MetaModel::GetConfig()->Get('tracking_level_linked_set_indirect_default'));
-	}
-
-	/**
-	 * Find the corresponding "link" attribute on the target class, if any
-	 * @return null | AttributeDefinition
-	 * @throws \CoreException
-	 */
-	public function GetMirrorLinkAttribute()
-	{
-		$oRet = null;
-		/** @var \AttributeExternalKey $oExtKeyToRemote */
-		$oExtKeyToRemote = MetaModel::GetAttributeDef($this->GetLinkedClass(), $this->GetExtKeyToRemote());
-		$sRemoteClass = $oExtKeyToRemote->GetTargetClass();
-		foreach (MetaModel::ListAttributeDefs($sRemoteClass) as $sRemoteAttCode => $oRemoteAttDef)
-		{
-			if (!$oRemoteAttDef instanceof AttributeLinkedSetIndirect) continue;
-			if ($oRemoteAttDef->GetLinkedClass() != $this->GetLinkedClass()) continue;
-			if ($oRemoteAttDef->GetExtKeyToMe() != $this->GetExtKeyToRemote()) continue;
-			if ($oRemoteAttDef->GetExtKeyToRemote() != $this->GetExtKeyToMe()) continue;
-			$oRet = $oRemoteAttDef;
-			break;
-		}
-		return $oRet;
-	}
-}
-
-/**
- * Abstract class implementing default filters for a DB column  
- *
- * @package	 iTopORM
- */
-class AttributeDBFieldVoid extends AttributeDefinition
-{	
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("allowed_values", "depends_on", "sql"));
-	}
-
-	// To be overriden, used in GetSQLColumns
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return 'VARCHAR(255)'
-			.CMDBSource::GetSqlStringColumnDefinition()
-			.($bFullSpec ? $this->GetSQLColSpec() : '');
-	}
-	protected function GetSQLColSpec()
-	{
-		$default = $this->ScalarToSQL($this->GetDefaultValue());
-		if (is_null($default))
-		{
-			$sRet = '';
-		}
-		else
-		{
-			if (is_numeric($default))
-			{
-				// Though it is a string in PHP, it will be considered as a numeric value in MySQL
-				// Then it must not be quoted here, to preserve the compatibility with the value returned by CMDBSource::GetFieldSpec
-				$sRet = " DEFAULT $default";
-			}
-			else
-			{
-				$sRet = " DEFAULT ".CMDBSource::Quote($default);
-			}
-		}
-		return $sRet;
-	}
-
-	public function GetEditClass() {return "String";}
-	
-	public function GetValuesDef() {return $this->Get("allowed_values");} 
-	public function GetPrerequisiteAttributes($sClass = null) {return $this->Get("depends_on");}
-
-	static public function IsBasedOnDBColumns() {return true;}
-	static public function IsScalar() {return true;}
-	public function IsWritable() {return !$this->IsMagic();}
-	public function GetSQLExpr()
-	{
-		return $this->Get("sql");
-	}
-
-	public function GetDefaultValue(DBObject $oHostObject = null) {return $this->MakeRealValue("", $oHostObject);}
-	public function IsNullAllowed() {return false;}
-
-	// 
-	protected function ScalarToSQL($value) {return $value;} // format value as a valuable SQL literal (quoted outside)
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		$aColumns = array();
-		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
-		$aColumns[''] = $this->Get("sql");
-		return $aColumns;
-	}
-
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		$value = $this->MakeRealValue($aCols[$sPrefix.''], null);
-		return $value;
-	}
-	public function GetSQLValues($value)
-	{
-		$aValues = array();
-		$aValues[$this->Get("sql")] = $this->ScalarToSQL($value);
-		return $aValues;
-	}
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->Get("sql")] = $this->GetSQLCol($bFullSpec);
-		return $aColumns;
-	}
-
-	public function GetFilterDefinitions()
-	{
-		return array($this->GetCode() => new FilterFromAttribute($this));
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array("="=>"equals", "!="=>"differs from");
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return "=";
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		$sQValue = CMDBSource::Quote($value);
-		switch ($sOpCode)
-		{
-		case '!=':
-			return $this->GetSQLExpr()." != $sQValue";
-			break;
-		case '=':
-		default:
-			return $this->GetSQLExpr()." = $sQValue";
-		}
-	} 
-}
-
-/**
- * Base class for all kind of DB attributes, with the exception of external keys 
- *
- * @package	 iTopORM
- */
-class AttributeDBField extends AttributeDBFieldVoid
-{	
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("default_value", "is_null_allowed"));
-	}
-	public function GetDefaultValue(DBObject $oHostObject = null) {return $this->MakeRealValue($this->Get("default_value"), $oHostObject);}
-	public function IsNullAllowed() {return $this->Get("is_null_allowed");}
-}
-
-/**
- * Map an integer column to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeInteger extends AttributeDBField
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_NUMERIC;
-
-	static public function ListExpectedParams()
-	{
-		return parent::ListExpectedParams();
-		//return array_merge(parent::ListExpectedParams(), array());
-	}
-
-	public function GetEditClass() {return "String";}
-	protected function GetSQLCol($bFullSpec = false) {return "INT(11)".($bFullSpec ? $this->GetSQLColSpec() : '');}
-	
-	public function GetValidationPattern()
-	{
-		return "^[0-9]+$";
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array(
-			"!="=>"differs from",
-			"="=>"equals",
-			">"=>"greater (strict) than",
-			">="=>"greater than",
-			"<"=>"less (strict) than",
-			"<="=>"less than",
-			"in"=>"in"
-		);
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		// Unless we implement an "equals approximately..." or "same order of magnitude"
-		return "=";
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		$sQValue = CMDBSource::Quote($value);
-		switch ($sOpCode)
-		{
-		case '!=':
-			return $this->GetSQLExpr()." != $sQValue";
-			break;
-		case '>':
-			return $this->GetSQLExpr()." > $sQValue";
-			break;
-		case '>=':
-			return $this->GetSQLExpr()." >= $sQValue";
-			break;
-		case '<':
-			return $this->GetSQLExpr()." < $sQValue";
-			break;
-		case '<=':
-			return $this->GetSQLExpr()." <= $sQValue";
-			break;
-		case 'in':
-			if (!is_array($value)) throw new CoreException("Expected an array for argument value (sOpCode='$sOpCode')");
-			return $this->GetSQLExpr()." IN ('".implode("', '", $value)."')"; 
-			break;
-
-		case '=':
-		default:
-			return $this->GetSQLExpr()." = \"$value\"";
-		}
-	} 
-
-	public function GetNullValue()
-	{
-		return null;
-	} 
-	public function IsNull($proposedValue)
-	{
-		return is_null($proposedValue);
-	} 
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return null;
-		if ($proposedValue === '') return null; // 0 is transformed into '' !
-		return (int)$proposedValue;
-	}
-
-	public function ScalarToSQL($value)
-	{
-		assert(is_numeric($value) || is_null($value));
-		return $value; // supposed to be an int
-	}
-}
-
-/**
- * An external key for which the class is defined as the value of another attribute 
- *
- * @package	 iTopORM
- */
-class AttributeObjectKey extends AttributeDBFieldVoid
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_EXTERNAL_KEY;
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array('class_attcode', 'is_null_allowed'));
-	}
-
-	public function GetEditClass() {return "String";}
-	protected function GetSQLCol($bFullSpec = false) {return "INT(11)".($bFullSpec ? " DEFAULT 0" : "");}
-
-	public function GetDefaultValue(DBObject $oHostObject = null) {return 0;}
-	public function IsNullAllowed()
-	{
-		return $this->Get("is_null_allowed");
-	}
-
-
-	public function GetBasicFilterOperators()
-	{
-		return parent::GetBasicFilterOperators();
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return parent::GetBasicFilterLooseOperator();
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		return parent::GetBasicFilterSQLExpr($sOpCode, $value);
-	} 
-
-	public function GetNullValue()
-	{
-		return 0;
-	} 
-
-	public function IsNull($proposedValue)
-	{
-		return ($proposedValue == 0);
-	} 
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return 0;
-		if ($proposedValue === '') return 0;
-		if (MetaModel::IsValidObject($proposedValue)) {
-			/** @var \DBObject $proposedValue */
-			return $proposedValue->GetKey();
-		}
-		return (int)$proposedValue;
-	}
-}
-
-/**
- * Display an integer between 0 and 100 as a percentage / horizontal bar graph 
- *
- * @package	 iTopORM
- */
-class AttributePercentage extends AttributeInteger
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_NUMERIC;
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		$iWidth = 5; // Total width of the percentage bar graph, in em...
-		$iValue = (int)$sValue;
-		if ($iValue > 100)
-		{
-			$iValue = 100;
-		}
-		else if ($iValue < 0)
-		{
-			$iValue = 0;
-		}
-		if ($iValue > 90)
-		{
-			$sColor = "#cc3300";
-		}
-		else if ($iValue > 50)
-		{
-			$sColor = "#cccc00";
-		}
-		else
-		{
-			$sColor = "#33cc00";
-		}
-		$iPercentWidth = ($iWidth * $iValue) / 100;
-		return "<div style=\"width:{$iWidth}em;-moz-border-radius: 3px;-webkit-border-radius: 3px;border-radius: 3px;display:inline-block;border: 1px #ccc solid;\"><div style=\"width:{$iPercentWidth}em; display:inline-block;background-color:$sColor;\">&nbsp;</div></div>&nbsp;$sValue %";
-	}
-}
-
-/**
- * Map a decimal value column (suitable for financial computations) to an attribute
- * internally in PHP such numbers are represented as string. Should you want to perform
- * a calculation on them, it is recommended to use the BC Math functions in order to
- * retain the precision
- *
- * @package	 iTopORM
- */
-class AttributeDecimal extends AttributeDBField
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_NUMERIC;
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array('digits', 'decimals' /* including precision */));
-	}
-
-	public function GetEditClass() {return "String";}
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return "DECIMAL(".$this->Get('digits').",".$this->Get('decimals').")".($bFullSpec ? $this->GetSQLColSpec() : '');
-	}
-	
-	public function GetValidationPattern()
-	{
-		$iNbDigits = $this->Get('digits');
-		$iPrecision = $this->Get('decimals');
-		$iNbIntegerDigits = $iNbDigits - $iPrecision - 1; // -1 because the first digit is treated separately in the pattern below
-		return "^[-+]?[0-9]\d{0,$iNbIntegerDigits}(\.\d{0,$iPrecision})?$";
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array(
-			"!="=>"differs from",
-			"="=>"equals",
-			">"=>"greater (strict) than",
-			">="=>"greater than",
-			"<"=>"less (strict) than",
-			"<="=>"less than",
-			"in"=>"in"
-		);
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		// Unless we implement an "equals approximately..." or "same order of magnitude"
-		return "=";
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		$sQValue = CMDBSource::Quote($value);
-		switch ($sOpCode)
-		{
-		case '!=':
-			return $this->GetSQLExpr()." != $sQValue";
-			break;
-		case '>':
-			return $this->GetSQLExpr()." > $sQValue";
-			break;
-		case '>=':
-			return $this->GetSQLExpr()." >= $sQValue";
-			break;
-		case '<':
-			return $this->GetSQLExpr()." < $sQValue";
-			break;
-		case '<=':
-			return $this->GetSQLExpr()." <= $sQValue";
-			break;
-		case 'in':
-			if (!is_array($value)) throw new CoreException("Expected an array for argument value (sOpCode='$sOpCode')");
-			return $this->GetSQLExpr()." IN ('".implode("', '", $value)."')"; 
-			break;
-
-		case '=':
-		default:
-			return $this->GetSQLExpr()." = \"$value\"";
-		}
-	} 
-
-	public function GetNullValue()
-	{
-		return null;
-	} 
-	public function IsNull($proposedValue)
-	{
-		return is_null($proposedValue);
-	} 
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return null;
-		if ($proposedValue === '') return null;
-		return (string)$proposedValue;
-	}
-
-	public function ScalarToSQL($value)
-	{
-		assert(is_null($value) || preg_match('/'.$this->GetValidationPattern().'/', $value));
-		return $value; // null or string
-	}
-}
-
-/**
- * Map a boolean column to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeBoolean extends AttributeInteger
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static public function ListExpectedParams()
-	{
-		return parent::ListExpectedParams();
-		//return array_merge(parent::ListExpectedParams(), array());
-	}
-
-	public function GetEditClass() {return "Integer";}
-	protected function GetSQLCol($bFullSpec = false) {return "TINYINT(1)".($bFullSpec ? $this->GetSQLColSpec() : '');}
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return null;
-		if ($proposedValue === '') return null;
-		if ((int)$proposedValue) return true;
-		return false;
-	}
-
-	public function ScalarToSQL($value)
-	{
-		if ($value) return 1;
-		return 0;
-	}
-
-	public function GetValueLabel($bValue)
-	{
-		if (is_null($bValue))
-		{
-			$sLabel = Dict::S('Core:'.get_class($this).'/Value:null');
-		}
-		else
-		{
-			$sValue = $bValue ? 'yes' : 'no';
-			$sDefault = Dict::S('Core:'.get_class($this).'/Value:'.$sValue);
-			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/Value:'.$sValue, $sDefault, true /*user lang*/);
-		}
-		return $sLabel;
-	}
-
-	public function GetValueDescription($bValue)
-	{
-		if (is_null($bValue))
-		{
-			$sDescription = Dict::S('Core:'.get_class($this).'/Value:null+');
-		}
-		else
-		{
-			$sValue = $bValue ? 'yes' : 'no';
-			$sDefault = Dict::S('Core:'.get_class($this).'/Value:'.$sValue.'+');
-			$sDescription = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/Value:'.$sValue.'+', $sDefault, true /*user lang*/);
-		}
-		return $sDescription;
-	}
-
-	public function GetAsHTML($bValue, $oHostObject = null, $bLocalize = true)
-	{
-		if (is_null($bValue))
-		{
-			$sRes = '';
-		}
-		elseif ($bLocalize)
-		{
-			$sLabel = $this->GetValueLabel($bValue);
-			$sDescription = $this->GetValueDescription($bValue);
-			// later, we could imagine a detailed description in the title
-			$sRes = "<span title=\"$sDescription\">".parent::GetAsHtml($sLabel)."</span>";
-		}
-		else
-		{
-			$sRes = $bValue ? 'yes' : 'no';
-		}
-		return $sRes;
-	}
-
-	public function GetAsXML($bValue, $oHostObject = null, $bLocalize = true)
-	{
-		if (is_null($bValue))
-		{
-			$sFinalValue = '';
-		}
-		elseif ($bLocalize)
-		{
-			$sFinalValue = $this->GetValueLabel($bValue);
-		}
-		else
-		{
-			$sFinalValue = $bValue ? 'yes' : 'no';
-		}
-		$sRes = parent::GetAsXML($sFinalValue, $oHostObject, $bLocalize);
-		return $sRes;
-	}
-
-	public function GetAsCSV($bValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		if (is_null($bValue))
-		{
-			$sFinalValue = '';
-		}
-		elseif ($bLocalize)
-		{
-			$sFinalValue = $this->GetValueLabel($bValue);
-		}
-		else
-		{
-			$sFinalValue = $bValue ? 'yes' : 'no';
-		}
-		$sRes = parent::GetAsCSV($sFinalValue, $sSeparator, $sTextQualifier, $oHostObject, $bLocalize);
-		return $sRes;
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\SelectField';
-	}
-
-	/**
-	 * @param \DBObject $oObject
-	 * @param \Combodo\iTop\Form\Field\SelectField $oFormField
-	 *
-	 * @return \Combodo\iTop\Form\Field\SelectField
-	 * @throws \CoreException
-	 */
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-
-		$oFormField->SetChoices(array('yes' => $this->GetValueLabel(true), 'no' => $this->GetValueLabel(false)));
-		parent::MakeFormField($oObject, $oFormField);
-
-		return $oFormField;
-	}
-
-	public function GetEditValue($value, $oHostObj = null)
-	{
-		if (is_null($value))
-		{
-			return '';
-		}
-		else
-		{
-			return $this->GetValueLabel($value);
-		}
-	}
-
-	/**
-	 * Helper to get a value that will be JSON encoded
-	 * The operation is the opposite to FromJSONToValue
-	 *
-	 * @param $value
-	 *
-	 * @return bool
-	 */
-	public function GetForJSON($value)
-	{
-		return (bool)$value;
-	}
-
-	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
-	{
-		$sInput = strtolower(trim($sProposedValue));
-		if ($bLocalizedValue)
-		{
-			switch ($sInput)
-			{
-				case '1': // backward compatibility
-				case $this->GetValueLabel(true):
-					$value = true;
-					break;
-				case '0': // backward compatibility
-				case 'no':
-				case $this->GetValueLabel(false):
-					$value = false;
-					break;
-				default:
-					$value = null;
-			}
-		}
-		else
-		{
-			switch ($sInput)
-			{
-				case '1': // backward compatibility
-				case 'yes':
-					$value = true;
-					break;
-				case '0': // backward compatibility
-				case 'no':
-					$value = false;
-					break;
-				default:
-					$value = null;
-			}
-		}
-		return $value;
-	}
-}
-
-/**
- * Map a varchar column (size < ?) to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeString extends AttributeDBField
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-
-	static public function ListExpectedParams()
-	{
-		return parent::ListExpectedParams();
-		//return array_merge(parent::ListExpectedParams(), array());
-	}
-
-	public function GetEditClass() {return "String";}
-
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return 'VARCHAR(255)'
-			.CMDBSource::GetSqlStringColumnDefinition()
-			.($bFullSpec ? $this->GetSQLColSpec() : '');
-	}
-
-	public function GetValidationPattern()
-	{
-		$sPattern = $this->GetOptional('validation_pattern', '');
-		if (empty($sPattern))
-		{
-			return parent::GetValidationPattern();
-		}
-		else
-		{
-			return $sPattern;
-		}
-	}
-
-	public function CheckFormat($value)
-	{
-		$sRegExp = $this->GetValidationPattern();
-		if (empty($sRegExp))
-		{
-			return true;
-		}
-		else
-		{
-			$sRegExp = str_replace('/', '\\/', $sRegExp);
-			return preg_match("/$sRegExp/", $value);
-		}
-	}
-
-	public function GetMaxSize()
-	{
-		return 255;
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array(
-			"="=>"equals",
-			"!="=>"differs from",
-			"Like"=>"equals (no case)",
-			"NotLike"=>"differs from (no case)",
-			"Contains"=>"contains",
-			"Begins with"=>"begins with",
-			"Finishes with"=>"finishes with"
-		);
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return "Contains";
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		$sQValue = CMDBSource::Quote($value);
-		switch ($sOpCode)
-		{
-		case '=':
-		case '!=':
-			return $this->GetSQLExpr()." $sOpCode $sQValue";
-		case 'Begins with':
-			return $this->GetSQLExpr()." LIKE ".CMDBSource::Quote("$value%");
-		case 'Finishes with':
-			return $this->GetSQLExpr()." LIKE ".CMDBSource::Quote("%$value");
-		case 'Contains':
-			return $this->GetSQLExpr()." LIKE ".CMDBSource::Quote("%$value%");
-		case 'NotLike':
-			return $this->GetSQLExpr()." NOT LIKE $sQValue";
-		case 'Like':
-		default:
-			return $this->GetSQLExpr()." LIKE $sQValue";
-		}
-	} 
-
-	public function GetNullValue()
-	{
-		return '';
-	} 
-
-	public function IsNull($proposedValue)
-	{
-		return ($proposedValue == '');
-	} 
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return '';
-		return (string)$proposedValue;
-	}
-
-	public function ScalarToSQL($value)
-	{
-		if (!is_string($value) && !is_null($value))
-		{
-			throw new CoreWarning('Expected the attribute value to be a string', array('found_type' => gettype($value), 'value' => $value, 'class' => $this->GetHostClass(), 'attribute' => $this->GetCode()));
-		}
-		return $value;
-	}
-
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		$sFrom = array("\r\n", $sTextQualifier);
-		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
-		$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
-		return $sTextQualifier.$sEscaped.$sTextQualifier;
-	}
-
-	public function GetDisplayStyle()
-	{
-		return $this->GetOptional('display_style', 'select');
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\StringField';
-	}
-
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-		parent::MakeFormField($oObject, $oFormField);
-
-		return $oFormField;
-	}
-
-}
-
-/**
- * An attibute that matches an object class 
- *
- * @package	 iTopORM
- */
-class AttributeClass extends AttributeString
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_ENUM;
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("class_category", "more_values"));
-	}
-
-	public function __construct($sCode, $aParams)
-	{
-		$this->m_sCode = $sCode;
-		$aParams["allowed_values"] = new ValueSetEnumClasses($aParams['class_category'], $aParams['more_values']);
-		parent::__construct($sCode, $aParams);
-	}
-
-	public function GetDefaultValue(DBObject $oHostObject = null)
-	{
-		$sDefault = parent::GetDefaultValue($oHostObject);
-		if (!$this->IsNullAllowed() && $this->IsNull($sDefault))
-		{
-			// For this kind of attribute specifying null as default value
-			// is authorized even if null is not allowed
-			
-			// Pick the first one...
-			$aClasses = $this->GetAllowedValues();
-			$sDefault = key($aClasses);
-		}
-		return $sDefault;
-	}
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		if (empty($sValue)) return '';
-		return MetaModel::GetName($sValue);
-	}
-
-	public function RequiresIndex()
-	{
-		return true;
-	}
-	
-	public function GetBasicFilterLooseOperator()
-	{
-		return '=';
-	}
-	
-}
-
-/**
- * An attibute that matches one of the language codes availables in the dictionnary 
- *
- * @package	 iTopORM
- */
-class AttributeApplicationLanguage extends AttributeString
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-
-	static public function ListExpectedParams()
-	{
-		return parent::ListExpectedParams();
-	}
-
-	public function __construct($sCode, $aParams)
-	{
-		$this->m_sCode = $sCode;
-		$aAvailableLanguages = Dict::GetLanguages();
-		$aLanguageCodes = array();
-		foreach($aAvailableLanguages as $sLangCode => $aInfo)
-		{
-			$aLanguageCodes[$sLangCode] = $aInfo['description'].' ('.$aInfo['localized_description'].')';
-		}
-		$aParams["allowed_values"] = new ValueSetEnum($aLanguageCodes);
-		parent::__construct($sCode, $aParams);
-	}
-
-	public function RequiresIndex()
-	{
-		return true;
-	}
-	
-	public function GetBasicFilterLooseOperator()
-	{
-		return '=';
-	}
-}
-
-/**
- * The attribute dedicated to the finalclass automatic attribute 
- *
- * @package	 iTopORM
- */
-class AttributeFinalClass extends AttributeString
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-	public $m_sValue;
-
-	public function __construct($sCode, $aParams)
-	{
-		$this->m_sCode = $sCode;
-		$aParams["allowed_values"] = null;
-		parent::__construct($sCode, $aParams);
-
-		$this->m_sValue = $this->Get("default_value");
-	}
-
-	public function IsWritable()
-	{
-		return false;
-	}
-	public function IsMagic()
-	{
-		return true;
-	}
-
-	public function RequiresIndex()
-	{
-		return true;
-	}
-
-	public function SetFixedValue($sValue)
-	{
-		$this->m_sValue = $sValue;
-	}
-	public function GetDefaultValue(DBObject $oHostObject = null)
-	{
-		return $this->m_sValue;
-	}
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		if (empty($sValue)) return '';
-		if ($bLocalize)
-		{
-			return MetaModel::GetName($sValue);
-		}
-		else
-		{
-			return $sValue;
-		}
-	}
-
-	/**
-	 * An enum can be localized
-	 *
-	 * @param string $sProposedValue
-	 * @param bool $bLocalizedValue
-	 * @param string $sSepItem
-	 * @param string $sSepAttribute
-	 * @param string $sSepValue
-	 * @param string $sAttributeQualifier
-	 *
-	 * @return mixed|null|string
-	 * @throws \CoreException
-	 * @throws \OQLException
-	 */
-	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
-	{
-		if ($bLocalizedValue)
-		{
-			// Lookup for the value matching the input
-			//
-			$sFoundValue = null;
-			$aRawValues = self::GetAllowedValues();
-			if (!is_null($aRawValues))
-			{
-				foreach ($aRawValues as $sKey => $sValue)
-				{
-					if ($sProposedValue == $sValue)
-					{
-						$sFoundValue = $sKey;
-						break;
-					}
-				}
-			}
-			if (is_null($sFoundValue))
-			{
-				return null;
-			}
-			return $this->MakeRealValue($sFoundValue, null);
-		}
-		else
-		{
-			return parent::MakeValueFromString($sProposedValue, $bLocalizedValue, $sSepItem, $sSepAttribute, $sSepValue, $sAttributeQualifier);
-		}
-	}
-
-
-	// Because this is sometimes used to get a localized/string version of an attribute...
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		if (empty($sValue)) return '';
-		return MetaModel::GetName($sValue);
-	}
-
-	/**
-	 * Helper to get a value that will be JSON encoded
-	 * The operation is the opposite to FromJSONToValue
-	 *
-	 * @param $value
-	 *
-	 * @return string
-	 */
-	public function GetForJSON($value)
-	{
-		// JSON values are NOT localized
-		return $value;
-	}
-
-	/**
-	 * @param $value
-	 * @param string $sSeparator
-	 * @param string $sTextQualifier
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 * @param bool $bConvertToPlainText
-	 *
-	 * @return string
-	 * @throws \CoreException
-	 * @throws \DictExceptionMissingString
-	 */
-	public function GetAsCSV(
-		$value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false
-	)
-	{
-		if ($bLocalize && $value != '')
-		{
-			$sRawValue = MetaModel::GetName($value);
-		}
-		else
-		{
-			$sRawValue = $value;
-		}
-		return parent::GetAsCSV($sRawValue, $sSeparator, $sTextQualifier, null, false, $bConvertToPlainText);
-	}
-
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (empty($value)) return '';
-		if ($bLocalize)
-		{
-			$sRawValue = MetaModel::GetName($value);
-		}
-		else
-		{
-			$sRawValue = $value;
-		}
-		return Str::pure2xml($sRawValue);
-	}
-
-	public function GetBasicFilterLooseOperator()
-	{
-		return '=';
-	}
-	
-	public function GetValueLabel($sValue)
-	{
-		if (empty($sValue)) return '';
-		return MetaModel::GetName($sValue);
-	}
-
-	public function GetAllowedValues($aArgs = array(), $sContains = '')
-	{
-		$aRawValues = MetaModel::EnumChildClasses($this->GetHostClass(), ENUM_CHILD_CLASSES_ALL);
-		$aLocalizedValues = array();
-		foreach ($aRawValues as $sClass)
-		{
-			$aLocalizedValues[$sClass] = MetaModel::GetName($sClass);
-		}
-  		return $aLocalizedValues;
-  	}
-}
-
-
-/**
- * Map a varchar column (size < ?) to an attribute that must never be shown to the user 
- *
- * @package	 iTopORM
- */
-class AttributePassword extends AttributeString
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static public function ListExpectedParams()
-	{
-		return parent::ListExpectedParams();
-		//return array_merge(parent::ListExpectedParams(), array());
-	}
-
-	public function GetEditClass() {return "Password";}
-
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return "VARCHAR(64)"
-			.CMDBSource::GetSqlStringColumnDefinition()
-			.($bFullSpec ? $this->GetSQLColSpec() : '');
-	}
-
-	public function GetMaxSize()
-	{
-		return 64;
-	}
-
-	public function GetFilterDefinitions()
-	{
-	// Note: due to this, you will get an error if a password is being declared as a search criteria (see ZLists)
-		// not allowed to search on passwords!
-		return array();
-	}
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		if (strlen($sValue) == 0)
-		{
-			return '';
-		}
-		else
-		{
-			return '******';
-		}
-	}
-	
-	public function IsPartOfFingerprint() { return false; } // Cannot reliably compare two encrypted passwords since the same password will be encrypted in diffferent manners depending on the random 'salt'
-}
-
-/**
- * Map a text column (size < 255) to an attribute that is encrypted in the database
- * The encryption is based on a key set per iTop instance. Thus if you export your
- * database (in SQL) to someone else without providing the key at the same time
- * the encrypted fields will remain encrypted
- *
- * @package	 iTopORM
- */
-class AttributeEncryptedString extends AttributeString
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static $sKey = null; // Encryption key used for all encrypted fields
-	static $sLibrary = null; // Encryption library used for all encrypted fields
-	public function __construct($sCode, $aParams)
-	{
-		parent::__construct($sCode, $aParams);
-		if (self::$sKey == null)
-		{
-			self::$sKey = MetaModel::GetConfig()->GetEncryptionKey();
-		}
-		if(self::$sLibrary == null)
-		{
-			self::$sLibrary = MetaModel::GetConfig()->GetEncryptionLibrary();
-		}
-	}
-	/**
-	 * When the attribute definitions are stored in APC cache:
-	 * 1) The static class variable $sKey is NOT serialized
-	 * 2) The object's constructor is NOT called upon wakeup
-	 * 3) mcrypt may crash the server if passed an empty key !!
-	 * 
-	 * So let's restore the key (if needed) when waking up
-	 **/
-	public function __wakeup()
-	{
-		if (self::$sKey == null)
-		{
-			self::$sKey = MetaModel::GetConfig()->GetEncryptionKey();
-		}
-		if(self::$sLibrary == null)
-		{
-			self::$sLibrary = MetaModel::GetConfig()->GetEncryptionLibrary();
-		}
-	}
-	
-
-	protected function GetSQLCol($bFullSpec = false) {return "TINYBLOB";}	
-
-	public function GetMaxSize()
-	{
-		return 255;
-	}
-
-	public function GetFilterDefinitions()
-	{
-		// Note: due to this, you will get an error if a an encrypted field is declared as a search criteria (see ZLists)
-		// not allowed to search on encrypted fields !
-		return array();
-	}
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return null;
-		return (string)$proposedValue;
-	}
-
-	/**
-	 * Decrypt the value when reading from the database
-	 *
-	 * @param array $aCols
-	 * @param string $sPrefix
-	 *
-	 * @return string
-	 * @throws \Exception
-	 */
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
- 		$oSimpleCrypt = new SimpleCrypt(self::$sLibrary);
- 		$sValue = $oSimpleCrypt->Decrypt(self::$sKey, $aCols[$sPrefix]);
-		return $sValue;
-	}
-
-	/**
-	 * Encrypt the value before storing it in the database
-	 *
-	 * @param $value
-	 *
-	 * @return array
-	 * @throws \Exception
-	 */
-	public function GetSQLValues($value)
-	{
- 		$oSimpleCrypt = new SimpleCrypt(self::$sLibrary);
- 		$encryptedValue = $oSimpleCrypt->Encrypt(self::$sKey, $value);
-
-		$aValues = array();
-		$aValues[$this->Get("sql")] = $encryptedValue;
-		return $aValues;
-	}
-}
-
-
-// Wiki formatting - experimental
-//
-// [[<objClass>:<objName>]]
-// Example: [[Server:db1.tnut.com]]
-define('WIKI_OBJECT_REGEXP', '/\[\[(.+):(.+)\]\]/U');
-
-
-/**
- * Map a text column (size > ?) to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeText extends AttributeString
-{
-	public function GetEditClass() {return ($this->GetFormat() == 'text') ? 'Text' : "HTML";}
-
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return "TEXT".CMDBSource::GetSqlStringColumnDefinition();
-	}
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->Get('sql')] = $this->GetSQLCol($bFullSpec);
-		if ($this->GetOptional('format', null) != null )
-		{
-			// Add the extra column only if the property 'format' is specified for the attribute
-			$aColumns[$this->Get('sql').'_format'] = "ENUM('text','html')".CMDBSource::GetSqlStringColumnDefinition();
-			if ($bFullSpec)
-			{
-				$aColumns[$this->Get('sql').'_format'].= " DEFAULT 'text'"; // default 'text' is for migrating old records
-			}
-		}
-		return $aColumns;
-	}
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		if ($sPrefix == '')
-		{
-			$sPrefix = $this->Get('sql');
-		}
-		$aColumns = array();
-		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
-		$aColumns[''] = $sPrefix;
-		if ($this->GetOptional('format', null) != null )
-		{
-			// Add the extra column only if the property 'format' is specified for the attribute
-			$aColumns['_format'] = $sPrefix.'_format';
-		}
-		return $aColumns;
-	}
-	
-	public function GetMaxSize()
-	{
-		// Is there a way to know the current limitation for mysql?
-		// See mysql_field_len()
-		return 65535;
-	}
-
-	static public function RenderWikiHtml($sText, $bWikiOnly = false)
-	{
-		if (!$bWikiOnly)
-		{
-			$sPattern = '/'.str_replace('/', '\/', utils::GetConfig()->Get('url_validation_pattern')).'/i';
-			if (preg_match_all($sPattern, $sText, $aAllMatches, PREG_SET_ORDER /* important !*/ |PREG_OFFSET_CAPTURE /* important ! */))
-			{
-				$i = count($aAllMatches);
-				// Replace the URLs by an actual hyperlink <a href="...">...</a>
-				// Let's do it backwards so that the initial positions are not modified by the replacement
-				// This works if the matches are captured: in the order they occur in the string  AND
-				// with their offset (i.e. position) inside the string
-				while($i > 0)
-				{
-					$i--;
-					$sUrl = $aAllMatches[$i][0][0]; // String corresponding to the main pattern
-					$iPos = $aAllMatches[$i][0][1]; // Position of the main pattern
-					$sText = substr_replace($sText, "<a href=\"$sUrl\">$sUrl</a>", $iPos, strlen($sUrl));
-					
-				}
-			}
-		}
-		if (preg_match_all(WIKI_OBJECT_REGEXP, $sText, $aAllMatches, PREG_SET_ORDER))
-		{
-			foreach($aAllMatches as $iPos => $aMatches)
-			{
-				$sClass = trim($aMatches[1]);
-				$sName = trim($aMatches[2]);
-				
-				if (MetaModel::IsValidClass($sClass))
-				{
-					$oObj = MetaModel::GetObjectByName($sClass, $sName, false /* MustBeFound */);
-					if (is_object($oObj))
-					{
-						// Propose a std link to the object
-						$sText = str_replace($aMatches[0], $oObj->GetHyperlink(), $sText);
-					}
-					else
-					{
-						// Propose a std link to the object
-						$sClassLabel = MetaModel::GetName($sClass);
-						$sText = str_replace($aMatches[0], "<span class=\"wiki_broken_link\">$sClassLabel:$sName</span>", $sText);
-						// Later: propose a link to create a new object
-						// Anyhow... there is no easy way to suggest default values based on the given FRIENDLY name
-						//$sText = preg_replace('/\[\[(.+):(.+)\]\]/', '<a href="'.utils::GetAbsoluteUrlAppRoot().'pages/UI.php?operation=new&class='.$sClass.'&default[att1]=xxx&default[att2]=yyy">'.$sName.'</a>', $sText);
-					}
-				}
-			}
-		}
-		return $sText;
-	}
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		$aStyles = array();
-		if ($this->GetWidth() != '')
-		{
-			$aStyles[] = 'width:'.$this->GetWidth();
-		}
-		if ($this->GetHeight() != '')
-		{
-			$aStyles[] = 'height:'.$this->GetHeight();
-		}
-		$sStyle = '';
-		if (count($aStyles) > 0)
-		{
-			$aStyles[] = 'overflow:auto';
-			$sStyle = 'style="'.implode(';', $aStyles).'"';
-		}
-		
-		if ($this->GetFormat() == 'text')
-		{
-			$sValue = parent::GetAsHTML($sValue, $oHostObject, $bLocalize);
-			$sValue = self::RenderWikiHtml($sValue);
-			return "<div $sStyle>".str_replace("\n", "<br>\n", $sValue).'</div>';			
-		}
-		else
-		{
-			$sValue = self::RenderWikiHtml($sValue, true /* wiki only */);
-			return "<div class=\"HTML\" $sStyle>".InlineImage::FixUrls($sValue).'</div>';
-		}
-		
-	}
-
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		if ($this->GetFormat() == 'text')
-		{
-			if (preg_match_all(WIKI_OBJECT_REGEXP, $sValue, $aAllMatches, PREG_SET_ORDER))
-			{
-				foreach($aAllMatches as $iPos => $aMatches)
-				{
-					$sClass = $aMatches[1];
-					$sName = $aMatches[2];
-
-					if (MetaModel::IsValidClass($sClass))
-					{
-						$sClassLabel = MetaModel::GetName($sClass);
-						$sValue = str_replace($aMatches[0], "[[$sClassLabel:$sName]]", $sValue);
-					}
-				}
-			}
-		}
-		else
-		{
-			$sValue = str_replace('&', '&amp;', $sValue);
-		}
-		return $sValue;
-	}
-
-	/**
-	 * For fields containing a potential markup, return the value without this markup
-	 *
-	 * @param string $sValue
-	 * @param \DBObject $oHostObj
-	 *
-	 * @return string
-	 */
-	public function GetAsPlainText($sValue, $oHostObj = null)
-	{
-		if ($this->GetFormat() == 'html')
-		{
-			return (string) utils::HtmlToText($this->GetEditValue($sValue, $oHostObj));
-		}
-		else
-		{
-			return parent::GetAsPlainText($sValue, $oHostObj);
-		}
-	}
-	
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		$sValue = $proposedValue;
-		switch ($this->GetFormat())
-		{
-			case 'html':
-			if (($sValue !== null) && ($sValue !== ''))
-			{
-				$sValue = HTMLSanitizer::Sanitize($sValue);
-			}
-			break;
-			
-			case 'text':
-			default:
-			if (preg_match_all(WIKI_OBJECT_REGEXP, $sValue, $aAllMatches, PREG_SET_ORDER))
-			{
-				foreach($aAllMatches as $iPos => $aMatches)
-				{
-					$sClassLabel = $aMatches[1];
-					$sName = $aMatches[2];
-
-					if (!MetaModel::IsValidClass($sClassLabel))
-					{
-						$sClass = MetaModel::GetClassFromLabel($sClassLabel);
-						if ($sClass)
-						{
-							$sValue = str_replace($aMatches[0], "[[$sClass:$sName]]", $sValue);
-						}
-					}
-				}
-			}
-		}
-		return $sValue;
-	}
-
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		return Str::pure2xml($value);
-	}
-	
-	public function GetWidth()
-	{
-		return $this->GetOptional('width', '');		
-	}
-	
-	public function GetHeight()
-	{
-		return $this->GetOptional('height', '');		
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\TextAreaField';
-	}
-
-	/**
-	 * @param \DBObject $oObject
-	 * @param \Combodo\iTop\Form\Field\TextAreaField $oFormField
-	 *
-	 * @return \Combodo\iTop\Form\Field\TextAreaField
-	 * @throws \CoreException
-	 */
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			/** @var \Combodo\iTop\Form\Field\TextAreaField $oFormField */
-			$oFormField = new $sFormFieldClass($this->GetCode(), null, $oObject);
-			$oFormField->SetFormat($this->GetFormat());
-		}
-		parent::MakeFormField($oObject, $oFormField);
-
-		return $oFormField;
-	}
-
-	/**
-	 * The actual formatting of the field: either text (=plain text) or html (= text with HTML markup)
-	 * @return string
-	 */
-	public function GetFormat()
-	{
-		return $this->GetOptional('format', 'text');
-	}
-
-	/**
-	 * Read the value from the row returned by the SQL query and transorms it to the appropriate
-	 * internal format (either text or html)
-	 *
-	 * @see AttributeDBFieldVoid::FromSQLToValue()
-	 *
-	 * @param array $aCols
-	 * @param string $sPrefix
-	 *
-	 * @return string
-	 */
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		$value = $aCols[$sPrefix.''];
-		if ($this->GetOptional('format', null) != null )
-		{
-			// Read from the extra column only if the property 'format' is specified for the attribute
-			$sFormat = $aCols[$sPrefix.'_format'];
-		}
-		else
-		{
-			$sFormat = $this->GetFormat();
-		}
-		
-		switch($sFormat)
-		{
-			case 'text':
-			if ($this->GetFormat() == 'html')
-			{
-				$value = utils::TextToHtml($value);
-			}
-			break;
-			
-			case 'html':
-			if ($this->GetFormat() == 'text')
-			{
-				$value = utils::HtmlToText($value);
-			}
-			else
-			{
-				$value = InlineImage::FixUrls((string)$value);
-			}
-			break;
-			
-			default:
-			// unknown format ??
-		}
-		return $value;
-	}
-	
-	public function GetSQLValues($value)
-	{
-		$aValues = array();
-		$aValues[$this->Get("sql")] = $this->ScalarToSQL($value);
-		if ($this->GetOptional('format', null) != null )
-		{
-			// Add the extra column only if the property 'format' is specified for the attribute
-			$aValues[$this->Get("sql").'_format'] = $this->GetFormat();
-		}
-		return $aValues;
-	}	
-	
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		switch($this->GetFormat())
-		{
-			case 'html':
-			if ($bConvertToPlainText)
-			{
-				$sValue = utils::HtmlToText((string)$sValue);
-			}
-			$sFrom = array("\r\n", $sTextQualifier);
-			$sTo = array("\n", $sTextQualifier.$sTextQualifier);
-			$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
-			return $sTextQualifier.$sEscaped.$sTextQualifier;
-			break;
-			
-			case 'text':
-			default:
-			return parent::GetAsCSV($sValue, $sSeparator, $sTextQualifier, $oHostObject, $bLocalize, $bConvertToPlainText);
-		}
-	}
-}
-
-/**
- * Map a log to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeLongText extends AttributeText
-{
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return "LONGTEXT".CMDBSource::GetSqlStringColumnDefinition();
-	}
-
-	public function GetMaxSize()
-	{
-		// Is there a way to know the current limitation for mysql?
-		// See mysql_field_len()
-		return 65535*1024; // Limited... still 64 Mb!
-	}
-}
-
-/**
- * An attibute that stores a case log (i.e journal) 
- *
- * @package	 iTopORM
- */
-class AttributeCaseLog extends AttributeLongText
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-
-	public function GetNullValue()
-	{
-		return '';
-	} 
-
-	public function IsNull($proposedValue)
-	{
-		if (!($proposedValue instanceof ormCaseLog))
-		{
-			return ($proposedValue == '');
-		}
-		return ($proposedValue->GetText() == '');
-	} 
-
-	public function ScalarToSQL($value)
-	{
-		if (!is_string($value) && !is_null($value))
-		{
-			throw new CoreWarning('Expected the attribute value to be a string', array('found_type' => gettype($value), 'value' => $value, 'class' => $this->GetCode(), 'attribute' => $this->GetHostClass()));
-		}
-		return $value;
-	}
-	public function GetEditClass() {return "CaseLog";}
-
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		if (!($sValue instanceOf ormCaseLog))
-		{
-			return '';
-		}
-		return $sValue->GetModifiedEntry();
-	}
-
-	/**
-	 * For fields containing a potential markup, return the value without this markup
-	 *
-	 * @param mixed $value
-	 * @param \DBObject $oHostObj
-	 *
-	 * @return string
-	 */
-	public function GetAsPlainText($value, $oHostObj = null)
-	{
-		if ($value instanceOf ormCaseLog)
-		{
-			/** ormCaseLog $value */
-			return $value->GetAsPlainText();
-		}
-		else
-		{
-			return (string) $value;
-		}
-	}
-	
-	public function GetDefaultValue(DBObject $oHostObject = null) {return new ormCaseLog();}
-	public function Equals($val1, $val2) {return ($val1->GetText() == $val2->GetText());}
-
-
-	/**
-	 * Facilitate things: allow the user to Set the value from a string
-	 *
-	 * @param $proposedValue
-	 * @param \DBObject $oHostObj
-	 *
-	 * @return mixed|null|\ormCaseLog|string
-	 * @throws \Exception
-	 */
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if ($proposedValue instanceof ormCaseLog)
-		{
-			// Passthrough
-			$ret = clone $proposedValue;
-		}
-		else
-		{
-			// Append the new value if an instance of the object is supplied
-			//
-			$oPreviousLog = null;
-			if ($oHostObj != null)
-			{
-				$oPreviousLog = $oHostObj->Get($this->GetCode());
-				if (!is_object($oPreviousLog))
-				{
-					$oPreviousLog = $oHostObj->GetOriginal($this->GetCode());;
-				}
-				
-			}
-			if (is_object($oPreviousLog))
-			{
-				$oCaseLog = clone($oPreviousLog);
-			}
-			else
-			{
-				$oCaseLog = new ormCaseLog();
-			}
-
-			if ($proposedValue instanceof stdClass)
-			{
-				$oCaseLog->AddLogEntryFromJSON($proposedValue);
-			}
-			else
-			{
-				if (strlen($proposedValue) > 0)
-				{
-					$oCaseLog->AddLogEntry($proposedValue);
-				}
-			}
-			$ret = $oCaseLog;
-		}
-		return $ret;
-	}
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		if ($sPrefix == '')
-		{
-			$sPrefix = $this->Get('sql');
-		}
-		$aColumns = array();
-		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
-		$aColumns[''] = $sPrefix;
-		$aColumns['_index'] = $sPrefix.'_index';
-		return $aColumns;
-	}
-
-	/**
-	 * @param array $aCols
-	 * @param string $sPrefix
-	 *
-	 * @return \ormCaseLog
-	 * @throws \MissingColumnException
-	 */
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		if (!array_key_exists($sPrefix, $aCols))
-		{
-			$sAvailable = implode(', ', array_keys($aCols));
-			throw new MissingColumnException("Missing column '$sPrefix' from {$sAvailable}");
-		} 
-		$sLog = $aCols[$sPrefix];
-
-		if (isset($aCols[$sPrefix.'_index'])) 
-		{
-			$sIndex = $aCols[$sPrefix.'_index'];
-		}
-		else
-		{
-			// For backward compatibility, allow the current state to be: 1 log, no index
-			$sIndex = '';
-		}
-
-		if (strlen($sIndex) > 0)
-		{ 
-			$aIndex = unserialize($sIndex);
-			$value = new ormCaseLog($sLog, $aIndex);
-		}
-		else
-		{
-			$value = new ormCaseLog($sLog);
-		}
-		return $value;
-	}
-
-	public function GetSQLValues($value)
-	{
-		if (!($value instanceOf ormCaseLog))
-		{
-			$value = new ormCaseLog('');
-		}
-		$aValues = array();
-		$aValues[$this->GetCode()] = $value->GetText();
-		$aValues[$this->GetCode().'_index'] = serialize($value->GetIndex());
-
-		return $aValues;
-	}
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->GetCode()] = 'LONGTEXT' // 2^32 (4 Gb)
-			.CMDBSource::GetSqlStringColumnDefinition();
-		$aColumns[$this->GetCode().'_index'] = 'BLOB';
-		return $aColumns;
-	}
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if ($value instanceOf ormCaseLog)
-		{
-			$sContent = $value->GetAsHTML(null, false, array(__class__, 'RenderWikiHtml'));
-		}
-		else
-		{
-			$sContent = '';
-		}
-		$aStyles = array();
-		if ($this->GetWidth() != '')
-		{
-			$aStyles[] = 'width:'.$this->GetWidth();
-		}
-		if ($this->GetHeight() != '')
-		{
-			$aStyles[] = 'height:'.$this->GetHeight();
-		}
-		$sStyle = '';
-		if (count($aStyles) > 0)
-		{
-			$sStyle = 'style="'.implode(';', $aStyles).'"';
-		}
-		return "<div class=\"caselog\" $sStyle>".$sContent.'</div>';	}
-
-
-	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		if ($value instanceOf ormCaseLog)
-		{
-			return parent::GetAsCSV($value->GetText($bConvertToPlainText), $sSeparator, $sTextQualifier, $oHostObject, $bLocalize, $bConvertToPlainText);
-		}
-		else
-		{
-			return '';
-		}
-	}
-	
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if ($value instanceOf ormCaseLog)
-		{
-			return parent::GetAsXML($value->GetText(), $oHostObject, $bLocalize);
-		}
-		else
-		{
-			return '';
-		}
-	}
-
-	/**
-	 * List the available verbs for 'GetForTemplate'
-	 */	 
-	public function EnumTemplateVerbs()
-	{
-		return array(
-			'' => 'Plain text representation of all the log entries',
-			'head' => 'Plain text representation of the latest entry',
-			'head_html' => 'HTML representation of the latest entry',
-			'html' => 'HTML representation of all the log entries',
-		);
-	}
-
-	/**
-	 * Get various representations of the value, for insertion into a template (e.g. in Notifications)
-	 *
-	 * @param $value mixed The current value of the field
-	 * @param $sVerb string The verb specifying the representation of the value
-	 * @param $oHostObject DBObject The object
-	 * @param $bLocalize bool Whether or not to localize the value
-	 *
-	 * @return mixed
-	 * @throws \Exception
-	 */
-	public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
-	{
-		switch($sVerb)
-		{
-			case '':
-			return $value->GetText(true);
-			
-			case 'head':
-			return $value->GetLatestEntry('text');
-
-			case 'head_html':
-			return $value->GetLatestEntry('html');
-			
-			case 'html':
-			return $value->GetAsEmailHtml();
-	
-			default:
-			throw new Exception("Unknown verb '$sVerb' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
-		}
-	}
-	
-	/**
-	 * Helper to get a value that will be JSON encoded
-	 * The operation is the opposite to FromJSONToValue	 
-	 */	 	
-	public function GetForJSON($value)
-	{
-		return $value->GetForJSON();
-	}
-
-	/**
-	 * Helper to form a value, given JSON decoded data
-	 * The operation is the opposite to GetForJSON	 
-	 */	 	
-	public function FromJSONToValue($json)
-	{
-		if (is_string($json))
-		{
-			// Will be correctly handled in MakeRealValue
-			$ret = $json;
-		}
-		else
-		{
-			if (isset($json->add_item))
-			{
-				// Will be correctly handled in MakeRealValue
-				$ret = $json->add_item;
-				if (!isset($ret->message))
-				{
-					throw new Exception("Missing mandatory entry: 'message'");
-				}
-			}
-			else
-			{
-				$ret = ormCaseLog::FromJSON($json);
-			}
-		}
-		return $ret;
-	}
-	
-	public function Fingerprint($value)
-	{
-		$sFingerprint = '';
-		if ($value instanceOf ormCaseLog)
-		{
-			$sFingerprint = $value->GetText();
-		}
-		return $sFingerprint;
-	}
-	
-	/**
-	 * The actual formatting of the text: either text (=plain text) or html (= text with HTML markup)
-	 * @return string
-	 */
-	public function GetFormat()
-	{
-		return $this->GetOptional('format', 'html'); // default format for case logs is now HTML
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\CaseLogField';
-	}
-
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		// First we call the parent so the field is build
-		$oFormField = parent::MakeFormField($oObject, $oFormField);
-		// Then only we set the value
-		$oFormField->SetCurrentValue($this->GetEditValue($oObject->Get($this->GetCode())));
-		// And we set the entries
-		$oFormField->SetEntries($oObject->Get($this->GetCode())->GetAsArray());
-
-		return $oFormField;
-	}
-}
-
-/**
- * Map a text column (size > ?), containing HTML code, to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeHTML extends AttributeLongText
-{
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->Get('sql')] = $this->GetSQLCol();
-		if ($this->GetOptional('format', null) != null )
-		{
-			// Add the extra column only if the property 'format' is specified for the attribute
-			$aColumns[$this->Get('sql').'_format'] = "ENUM('text','html')";
-			if ($bFullSpec)
-			{
-				$aColumns[$this->Get('sql').'_format'].= " DEFAULT 'html'"; // default 'html' is for migrating old records
-			}
-		}
-		return $aColumns;
-	}
-
-	/**
-	 * The actual formatting of the text: either text (=plain text) or html (= text with HTML markup)
-	 * @return string
-	 */
-	public function GetFormat()
-	{
-		return $this->GetOptional('format', 'html'); // Defaults to HTML
-	}
-}
-
-/**
- * Specialization of a string: email 
- *
- * @package	 iTopORM
- */
-class AttributeEmailAddress extends AttributeString
-{
-	public function GetValidationPattern()
-	{
-		return $this->GetOptional('validation_pattern', '^'.utils::GetConfig()->Get('email_validation_pattern').'$');
-	}
-
-    static public function GetFormFieldClass()
-    {
-        return '\\Combodo\\iTop\\Form\\Field\\EmailField';
-    }
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		if (empty($sValue)) return '';
-
-		$sUrlDecorationClass = utils::GetConfig()->Get('email_decoration_class');
-
-		return '<a class="mailto" href="mailto:'.$sValue.'"><span class="text_decoration '.$sUrlDecorationClass.'"></span>'.parent::GetAsHTML($sValue).'</a>';
-	}
-}
-
-/**
- * Specialization of a string: IP address 
- *
- * @package	 iTopORM
- */
-class AttributeIPAddress extends AttributeString
-{
-	public function GetValidationPattern()
-	{
-		$sNum = '(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])';
-		return "^($sNum\\.$sNum\\.$sNum\\.$sNum)$";
-	}
-
-	public function GetOrderBySQLExpressions($sClassAlias)
-	{
-		// Note: This is the responsibility of this function to place backticks around column aliases
-		return array('INET_ATON(`'.$sClassAlias.$this->GetCode().'`)');
-	}
-}
-
-/**
- * Specialization of a string: phone number
- *
- * @package	 iTopORM
- */
-class AttributePhoneNumber extends AttributeString
-{
-    public function GetValidationPattern()
-    {
-        return $this->GetOptional('validation_pattern', '^'.utils::GetConfig()->Get('phone_number_validation_pattern').'$');
-    }
-
-    static public function GetFormFieldClass()
-    {
-        return '\\Combodo\\iTop\\Form\\Field\\PhoneField';
-    }
-
-    public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-    {
-        if (empty($sValue)) return '';
-
-        $sUrlDecorationClass = utils::GetConfig()->Get('phone_number_decoration_class');
-        $sUrlPattern = utils::GetConfig()->Get('phone_number_url_pattern');
-        $sUrl = sprintf($sUrlPattern, $sValue);
-
-        return '<a class="tel" href="'.$sUrl.'"><span class="text_decoration '.$sUrlDecorationClass.'"></span>'.parent::GetAsHTML($sValue).'</a>';
-    }
-}
-
-/**
- * Specialization of a string: OQL expression 
- *
- * @package	 iTopORM
- */
-class AttributeOQL extends AttributeText
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-
-	public function GetEditClass() {return "OQLExpression";}
-}
-
-/**
- * Specialization of a string: template (contains iTop placeholders like $current_contact_id$ or $this->name$) 
- *
- * @package	 iTopORM
- */
-class AttributeTemplateString extends AttributeString
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-}
-
-/**
- * Specialization of a text: template (contains iTop placeholders like $current_contact_id$ or $this->name$)
- *
- * @package	 iTopORM
- */
-class AttributeTemplateText extends AttributeText
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-}
-
-/**
- * Specialization of a HTML: template (contains iTop placeholders like $current_contact_id$ or $this->name$)
- *
- * @package	 iTopORM
- */
-class AttributeTemplateHTML extends AttributeText
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->Get('sql')] = $this->GetSQLCol();
-		if ($this->GetOptional('format', null) != null )
-		{
-			// Add the extra column only if the property 'format' is specified for the attribute
-			$aColumns[$this->Get('sql').'_format'] = "ENUM('text','html')";
-			if ($bFullSpec)
-			{
-				$aColumns[$this->Get('sql').'_format'].= " DEFAULT 'html'"; // default 'html' is for migrating old records
-			}
-		}
-		return $aColumns;
-	}
-
-	/**
-	 * The actual formatting of the text: either text (=plain text) or html (= text with HTML markup)
-	 * @return string
-	 */
-	public function GetFormat()
-	{
-		return $this->GetOptional('format', 'html'); // Defaults to HTML
-	}
-}
-
-
-/**
- * Map a enum column to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeEnum extends AttributeString
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_ENUM;
-
-	static public function ListExpectedParams()
-	{
-		return parent::ListExpectedParams();
-		//return array_merge(parent::ListExpectedParams(), array());
-	}
-
-	public function GetEditClass() {return "String";}
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		$oValDef = $this->GetValuesDef();
-		if ($oValDef)
-		{
-			$aValues = CMDBSource::Quote(array_keys($oValDef->GetValues(array(), "")), true);
-		}
-		else
-		{
-			$aValues = array();
-		}
-		if (count($aValues) > 0)
-		{
-			// The syntax used here do matters
-			// In particular, I had to remove unnecessary spaces to
-			// make sure that this string will match the field type returned by the DB
-			// (used to perform a comparison between the current DB format and the data model)
-			return "ENUM(".implode(",", $aValues).")"
-				.CMDBSource::GetSqlStringColumnDefinition()
-				.($bFullSpec ? $this->GetSQLColSpec() : '');
-		}
-		else
-		{
-			return "VARCHAR(255)"
-				.CMDBSource::GetSqlStringColumnDefinition()
-				.($bFullSpec ? " DEFAULT ''" : ""); // ENUM() is not an allowed syntax!
-		}
-	}
-	
-	protected function GetSQLColSpec()
-	{
-		$default = $this->ScalarToSQL($this->GetDefaultValue());
-		if (is_null($default))
-		{
-			$sRet = '';
-		}
-		else
-		{
-			// ENUMs values are strings so the default value must be a string as well,
-			// otherwise MySQL interprets the number as the zero-based index of the value in the list (i.e. the nth value in the list)
-			$sRet = " DEFAULT ".CMDBSource::Quote($default);
-		}
-		return $sRet;
-	}
-
-	public function ScalarToSQL($value)
-	{
-		// Note: for strings, the null value is an empty string and it is recorded as such in the DB
-		//	   but that wasn't working for enums, because '' is NOT one of the allowed values
-		//	   that's why a null value must be forced to a real null
-		$value = parent::ScalarToSQL($value);
-		if ($this->IsNull($value))
-		{
-			return null;
-		}
-		else
-		{
-			return $value;
-		}
-	}
-
-	public function RequiresIndex()
-	{
-		return false;
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return parent::GetBasicFilterOperators();
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return '=';
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		return parent::GetBasicFilterSQLExpr($sOpCode, $value);
-	} 
-
-	public function GetValueLabel($sValue)
-	{
-		if (is_null($sValue))
-		{
-			// Unless a specific label is defined for the null value of this enum, use a generic "undefined" label		
-			$sLabel = Dict::S('Class:'.$this->GetHostClass().'/Attribute:'.$this->GetCode().'/Value:'.$sValue, Dict::S('Enum:Undefined'));
-		}
-		else
-		{
-			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/Value:'.$sValue, null, true /*user lang*/);
-			if (is_null($sLabel))
-			{
-				$sDefault = str_replace('_', ' ', $sValue);
-				// Browse the hierarchy again, accepting default (english) translations
-				$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/Value:'.$sValue, $sDefault, false);
-			}
-		}
-		return $sLabel;
-	}
-
-	public function GetValueDescription($sValue)
-	{
-		if (is_null($sValue))
-		{
-			// Unless a specific label is defined for the null value of this enum, use a generic "undefined" label		
-			$sDescription = Dict::S('Class:'.$this->GetHostClass().'/Attribute:'.$this->GetCode().'/Value:'.$sValue.'+', Dict::S('Enum:Undefined'));
-		}
-		else
-		{
-			$sDescription = Dict::S('Class:'.$this->GetHostClass().'/Attribute:'.$this->GetCode().'/Value:'.$sValue.'+', '', true /* user language only */);
-			if (strlen($sDescription) == 0)
-			{
-				$sParentClass = MetaModel::GetParentClass($this->m_sHostClass);
-				if ($sParentClass)
-				{
-					if (MetaModel::IsValidAttCode($sParentClass, $this->m_sCode))
-					{
-						$oAttDef = MetaModel::GetAttributeDef($sParentClass, $this->m_sCode);
-						$sDescription = $oAttDef->GetValueDescription($sValue);
-					}
-				}
-			}
-		}
-		return $sDescription;
-	}
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		if ($bLocalize)
-		{
-			$sLabel = $this->GetValueLabel($sValue);
-			$sDescription = $this->GetValueDescription($sValue);
-			// later, we could imagine a detailed description in the title
-			$sRes = "<span title=\"$sDescription\">".parent::GetAsHtml($sLabel)."</span>";
-		}
-		else
-		{
-			$sRes = parent::GetAsHtml($sValue, $oHostObject, $bLocalize);
-		}
-		return $sRes;
-	}
-
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (is_null($value))
-		{
-			$sFinalValue = '';
-		}
-		elseif ($bLocalize)
-		{
-			$sFinalValue = $this->GetValueLabel($value);
-		}
-		else
-		{
-			$sFinalValue = $value;
-		}
-		$sRes = parent::GetAsXML($sFinalValue, $oHostObject, $bLocalize);
-		return $sRes;
-	}
-
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		if (is_null($sValue))
-		{
-			$sFinalValue = '';
-		}
-		elseif ($bLocalize)
-		{
-			$sFinalValue = $this->GetValueLabel($sValue);
-		}
-		else
-		{
-			$sFinalValue = $sValue;
-		}
-		$sRes = parent::GetAsCSV($sFinalValue, $sSeparator, $sTextQualifier, $oHostObject, $bLocalize);
-		return $sRes;
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\SelectField';
-	}
-
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			// Later : We should check $this->Get('display_style') and create a Radio / Select / ... regarding its value
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-
-		$oFormField->SetChoices($this->GetAllowedValues($oObject->ToArgsForQuery()));
-		parent::MakeFormField($oObject, $oFormField);
-
-		return $oFormField;
-	}
-
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		if (is_null($sValue))
-		{
-			return '';
-		}
-		else
-		{
-			return $this->GetValueLabel($sValue);
-		}
-	}
-
-	/**
-	 * Helper to get a value that will be JSON encoded
-	 * The operation is the opposite to FromJSONToValue	 
-	 */	 	
-	public function GetForJSON($value)
-	{
-		return $value;
-	}
-
-	public function GetAllowedValues($aArgs = array(), $sContains = '')
-	{
-		$aRawValues = parent::GetAllowedValues($aArgs, $sContains);
-		if (is_null($aRawValues)) return null;
-		$aLocalizedValues = array();
-		foreach ($aRawValues as $sKey => $sValue)
-		{
-			$aLocalizedValues[$sKey] = $this->GetValueLabel($sKey);
-		}
-  		return $aLocalizedValues;
-  	}
-
-  	public function GetMaxSize()
-    {
-	    return null;
-    }
-
-	/**
-	 * An enum can be localized
-	 */	 	
-	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
-	{
-		if ($bLocalizedValue)
-		{
-			// Lookup for the value matching the input
-			//
-			$sFoundValue = null;
-			$aRawValues = parent::GetAllowedValues();
-			if (!is_null($aRawValues))
-			{
-				foreach ($aRawValues as $sKey => $sValue)
-				{
-					$sRefValue = $this->GetValueLabel($sKey);
-					if ($sProposedValue == $sRefValue)
-					{
-						$sFoundValue = $sKey;
-						break;
-					}
-				}
-			}
-			if (is_null($sFoundValue))
-			{
-				return null;
-			}
-	  		return $this->MakeRealValue($sFoundValue, null);
-		}
-		else
-		{
-			return parent::MakeValueFromString($sProposedValue, $bLocalizedValue, $sSepItem, $sSepAttribute, $sSepValue, $sAttributeQualifier);
-		}
-	}
-
-  	/**
-  	 * Processes the input value to align it with the values supported
-  	 * by this type of attribute. In this case: turns empty strings into nulls
-  	 * @param mixed $proposedValue The value to be set for the attribute
-  	 * @return mixed The actual value that will be set
-  	 */
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if ($proposedValue == '') return null;
-		return parent::MakeRealValue($proposedValue, $oHostObj);
-	}
-	
-	public function GetOrderByHint()
-	{
-		$aValues = $this->GetAllowedValues();
-	
-		return Dict::Format('UI:OrderByHint_Values', implode(', ', $aValues));
-	}
-}
-
-/**
- * A meta enum is an aggregation of enum from subclasses into an enum of a base class
- * It has been designed is to cope with the fact that statuses must be defined in leaf classes, while it makes sense to
- * have a superstatus available on the root classe(s)
- *
- * @package	 iTopORM
- */
-class AttributeMetaEnum extends AttributeEnum
-{
-	static public function ListExpectedParams()
-	{
-		return array('allowed_values', 'sql', 'default_value', 'mapping');
-	}
-
-	public function IsNullAllowed()
-	{
-		return false; // Well... this actually depends on the mapping
-	}
-
-	public function IsWritable()
-	{
-		return false;
-	}
-
-	public function RequiresIndex()
-	{
-		return true;
-	}
-
-	public function GetPrerequisiteAttributes($sClass = null)
-	{
-		if (is_null($sClass))
-		{
-			$sClass = $this->GetHostClass();
-		}
-		$aMappingData = $this->GetMapRule($sClass);
-		if ($aMappingData == null)
-		{
-			$aRet = array();
-		}
-		else
-		{
-			$aRet = array($aMappingData['attcode']);
-		}
-		return $aRet;
-	}
-
-	/**
-	 * Overload the standard so as to leave the data unsorted
-	 *
-	 * @param array $aArgs
-	 * @param string $sContains
-	 * @return array|null
-	 */
-	public function GetAllowedValues($aArgs = array(), $sContains = '')
-	{
-		$oValSetDef = $this->GetValuesDef();
-		if (!$oValSetDef) return null;
-		$aRawValues = $oValSetDef->GetValueList();
-
-		if (is_null($aRawValues)) return null;
-		$aLocalizedValues = array();
-		foreach ($aRawValues as $sKey => $sValue)
-		{
-			$aLocalizedValues[$sKey] = Str::pure2html($this->GetValueLabel($sKey));
-		}
-		return $aLocalizedValues;
-	}
-
-	/**
-	 * Returns the meta value for the given object.
-	 * See also MetaModel::RebuildMetaEnums() that must be maintained when MapValue changes
-	 *
-	 * @param $oObject
-	 * @return mixed
-	 * @throws Exception
-	 */
-	public function MapValue($oObject)
-	{
-		$aMappingData = $this->GetMapRule(get_class($oObject));
-		if ($aMappingData == null)
-		{
-			$sRet = $this->GetDefaultValue();
-		}
-		else
-		{
-			$sAttCode = $aMappingData['attcode'];
-			$value = $oObject->Get($sAttCode);
-			if (array_key_exists($value, $aMappingData['values']))
-			{
-				$sRet = $aMappingData['values'][$value];
-			}
-			elseif ($this->GetDefaultValue() != '')
-			{
-				$sRet = $this->GetDefaultValue();
-			}
-			else
-			{
-				throw new Exception('AttributeMetaEnum::MapValue(): mapping not found for value "'.$value.'" in '.get_class($oObject).', on attribute '.MetaModel::GetAttributeOrigin($this->GetHostClass(), $this->GetCode()).'::'.$this->GetCode());
-			}
-		}
-		return $sRet;
-	}
-
-	public function GetMapRule($sClass)
-	{
-		$aMappings = $this->Get('mapping');
-		if (array_key_exists($sClass, $aMappings))
-		{
-			$aMappingData = $aMappings[$sClass];
-		}
-		else
-		{
-			$sParent = MetaModel::GetParentClass($sClass);
-			if (is_null($sParent))
-			{
-				$aMappingData = null;
-			}
-			else
-			{
-				$aMappingData = $this->GetMapRule($sParent);
-			}
-		}
-
-		return $aMappingData;
-	}
-}
-/**
- * Map a date+time column to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeDateTime extends AttributeDBField
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_DATE_TIME;
-
-	static $oFormat = null;
-
-	/**
-	 *
-	 * @return DateTimeFormat
-	 */
-	static public function GetFormat()
-	{
-		if (self::$oFormat == null)
-		{
-			static::LoadFormatFromConfig();		
-		}
-		return self::$oFormat;
-	}	
-	
-	/**
-	 * Load the 3 settings: date format, time format and data_time format from the configuration
-	 */
-	protected static function LoadFormatFromConfig()
-	{
-		$aFormats = MetaModel::GetConfig()->Get('date_and_time_format');
-		$sLang = Dict::GetUserLanguage();
-		$sDateFormat = isset($aFormats[$sLang]['date']) ? $aFormats[$sLang]['date'] : (isset($aFormats['default']['date']) ? $aFormats['default']['date'] : 'Y-m-d');
-		$sTimeFormat = isset($aFormats[$sLang]['time']) ? $aFormats[$sLang]['time'] : (isset($aFormats['default']['time']) ? $aFormats['default']['time'] : 'H:i:s');
-		$sDateAndTimeFormat = isset($aFormats[$sLang]['date_time']) ? $aFormats[$sLang]['date_time'] : (isset($aFormats['default']['date_time']) ? $aFormats['default']['date_time'] : '$date $time');
-		
-		$sFullFormat = str_replace(array('$date', '$time'), array($sDateFormat, $sTimeFormat), $sDateAndTimeFormat);
-		
-		self::SetFormat(new DateTimeFormat($sFullFormat));
-		AttributeDate::SetFormat(new DateTimeFormat($sDateFormat));		
-	}
-	
-	/**
-	 * Returns the format string used for the date & time stored in memory
-	 * @return string
-	 */
-	static public function GetInternalFormat()
-	{
-		return 'Y-m-d H:i:s';
-	}
-
-	/**
-	 * Returns the format string used for the date & time written to MySQL
-	 * @return string
-	 */
-	static public function GetSQLFormat()
-	{
-		return 'Y-m-d H:i:s';
-	}
-	
-	static public function SetFormat(DateTimeFormat $oDateTimeFormat)
-	{
-		self::$oFormat = $oDateTimeFormat;
-	}
-	
-	static public function GetSQLTimeFormat()
-	{
-		return 'H:i:s';
-	}
-	
-	/**
-	 * Parses a search string coming from user input
-	 * @param string $sSearchString
-	 * @return string
-	 */
-	public function ParseSearchString($sSearchString)
-	{
-		try
-		{
-			$oDateTime = $this->GetFormat()->Parse($sSearchString);
-			$sSearchString = $oDateTime->format($this->GetInternalFormat());
-		}
-		catch(Exception $e)
-		{
-			$sFormatString = '!'.(string)AttributeDate::GetFormat(); // BEWARE: ! is needed to set non-parsed fields to zero !!!
-			$oDateTime = DateTime::createFromFormat($sFormatString, $sSearchString); 
-			if ($oDateTime !== false)
-			{
-				$sSearchString = $oDateTime->format($this->GetInternalFormat());
-			}
-		}
-		return $sSearchString;
-	}
-	
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\DateTimeField';
-	}
-	
-	/**
-	 * Override to specify Field class
-	 *
-	 * When called first, $oFormField is null and will be created (eg. Make). Then when the ::parent is called and the $oFormField is passed, MakeFormField behave more like a Prepare.
-	 */
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-		$oFormField->SetPHPDateTimeFormat((string) $this->GetFormat());
-		$oFormField->SetJSDateTimeFormat($this->GetFormat()->ToMomentJS());
-
-		$oFormField = parent::MakeFormField($oObject, $oFormField);
-
-		// After call to the parent as it sets the current value
-		$oFormField->SetCurrentValue($this->GetFormat()->Format($oObject->Get($this->GetCode())));
-
-		return $oFormField;
-	}
-
-    /**
-     * @inheritdoc
-     */
-    public function EnumTemplateVerbs()
-    {
-        return array(
-            '' => 'Formatted representation',
-            'raw' => 'Not formatted representation',
-        );
-    }
-
-    /**
-     * @inheritdoc
-     */
-    public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
-    {
-        switch ($sVerb)
-        {
-            case '':
-            case 'text':
-                return static::GetFormat()->format($value);
-                break;
-            case 'html':
-                // Note: Not passing formatted value as the method will format it.
-                return $this->GetAsHTML($value);
-                break;
-            case 'raw':
-                return $value;
-                break;
-            default:
-                return parent::GetForTemplate($value, $sVerb, $oHostObject, $bLocalize);
-                break;
-        }
-    }
-
-	static public function ListExpectedParams()
-	{
-		return parent::ListExpectedParams();
-		//return array_merge(parent::ListExpectedParams(), array());
-	}
-
-	public function GetEditClass() {return "DateTime";}
-
-
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		return (string)static::GetFormat()->format($sValue);
-	}	
-	public function GetValueLabel($sValue, $oHostObj = null)
-	{
-		return (string)static::GetFormat()->format($sValue);
-	}	
-	
-	protected function GetSQLCol($bFullSpec = false) {return "DATETIME";}
-
-	public function GetImportColumns()
-	{
-		// Allow an empty string to be a valid value (synonym for "reset")
-		$aColumns = array();
-		$aColumns[$this->GetCode()] = 'VARCHAR(19)';
-		return $aColumns;
-	}
-
-	public static function GetAsUnixSeconds($value)
-	{
-		$oDeadlineDateTime = new DateTime($value);
-		$iUnixSeconds = $oDeadlineDateTime->format('U');
-		return $iUnixSeconds;
-	}
-
-	public function GetDefaultValue(DBObject $oHostObject = null)
-	{
-		// null value will be replaced by the current date, if not already set, in DoComputeValues
-		return $this->GetNullValue();
-	}
-
-	public function GetValidationPattern()
-	{
-		return static::GetFormat()->ToRegExpr();
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array(
-			"="=>"equals",
-			"!="=>"differs from",
-			"<"=>"before",
-			"<="=>"before",
-			">"=>"after (strictly)",
-			">="=>"after",
-			"SameDay"=>"same day (strip time)",
-			"SameMonth"=>"same year/month",
-			"SameYear"=>"same year",
-			"Today"=>"today",
-			">|"=>"after today + N days",
-			"<|"=>"before today + N days",
-			"=|"=>"equals today + N days",
-		);
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		// Unless we implement a "same xxx, depending on given precision" !
-		return "=";
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		$sQValue = CMDBSource::Quote($value);
-
-		switch ($sOpCode)
-		{
-		case '=':
-		case '!=':
-		case '<':
-		case '<=':
-		case '>':
-		case '>=':
-			return $this->GetSQLExpr()." $sOpCode $sQValue";
-		case 'SameDay':
-			return "DATE(".$this->GetSQLExpr().") = DATE($sQValue)";
-		case 'SameMonth':
-			return "DATE_FORMAT(".$this->GetSQLExpr().", '%Y-%m') = DATE_FORMAT($sQValue, '%Y-%m')";
-		case 'SameYear':
-			return "MONTH(".$this->GetSQLExpr().") = MONTH($sQValue)";
-		case 'Today':
-			return "DATE(".$this->GetSQLExpr().") = CURRENT_DATE()";
-		case '>|':
-			return "DATE(".$this->GetSQLExpr().") > DATE_ADD(CURRENT_DATE(), INTERVAL $sQValue DAY)";
-		case '<|':
-			return "DATE(".$this->GetSQLExpr().") < DATE_ADD(CURRENT_DATE(), INTERVAL $sQValue DAY)";
-		case '=|':
-			return "DATE(".$this->GetSQLExpr().") = DATE_ADD(CURRENT_DATE(), INTERVAL $sQValue DAY)";
-		default:
-			return $this->GetSQLExpr()." = $sQValue";
-		}
-	}
-	
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue))
-		{
-			return null;
-		}
-		if (is_string($proposedValue) && ($proposedValue == "") && $this->IsNullAllowed())
-		{
-			return null;
-		}
-		if (!is_numeric($proposedValue))
-		{
-			// Check the format
-			try
-			{
-				$oFormat = new DateTimeFormat($this->GetInternalFormat());
-				$oFormat->Parse($proposedValue);
-			}
-			catch (Exception $e)
-			{
-				throw new Exception('Wrong format for date attribute '.$this->GetCode().', expecting "'.$this->GetInternalFormat().'" and got "'.$proposedValue.'"');
-			}
-
-			return $proposedValue;
-		}
-
-		return date(static::GetInternalFormat(), $proposedValue);
-	}
-
-	public function ScalarToSQL($value)
-	{
-		if (empty($value))
-		{	
-			return null;
-		}
-		return $value;
-	}
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		return Str::pure2html(static::GetFormat()->format($value));
-	}
-
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		return Str::pure2xml($value);
-	}
-
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		if (empty($sValue) || ($sValue === '0000-00-00 00:00:00') || ($sValue === '0000-00-00'))
-		{
-			return '';
-		}
-		else if ((string)static::GetFormat() !== static::GetInternalFormat())
-		{
-			// Format conversion
-			$oDate = new DateTime($sValue);
-			if ($oDate !== false)
-			{
-				$sValue = static::GetFormat()->format($oDate);
-			}
-		}
-		$sFrom = array("\r\n", $sTextQualifier);
-		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
-		$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
-		return $sTextQualifier.$sEscaped.$sTextQualifier;
-	}
-
-	/**
-	 * Parses a string to find some smart search patterns and build the corresponding search/OQL condition
-	 * Each derived class is reponsible for defining and processing their own smart patterns, the base class
-	 * does nothing special, and just calls the default (loose) operator
-	 *
-	 * @param string $sSearchText The search string to analyze for smart patterns
-	 * @param FieldExpression $oField The FieldExpression representing the atttribute code in this OQL query
-	 * @param array $aParams Values of the query parameters
-	 * @param bool $bParseSearchString
-	 *
-	 * @return Expression The search condition to be added (AND) to the current search
-	 * @throws \CoreException
-	 */
-	public function GetSmartConditionExpression($sSearchText, FieldExpression $oField, &$aParams, $bParseSearchString = false)
-	{
-		// Possible smart patterns
-		$aPatterns = array(
-			'between' => array('pattern' => '/^\[(.*),(.*)\]$/', 'operator' => 'n/a'),
-			'greater than or equal' => array('pattern' => '/^>=(.*)$/', 'operator' => '>='),
-			'greater than' => array('pattern' => '/^>(.*)$/', 'operator' => '>'),
-			'less than or equal' => array('pattern' => '/^<=(.*)$/', 'operator' => '<='),
-			'less than' =>  array('pattern' => '/^<(.*)$/', 'operator' => '<'),
-		);
-		
-		$sPatternFound = '';
-		$aMatches = array();
-		foreach($aPatterns as $sPatName => $sPattern)
-		{
-			if (preg_match($sPattern['pattern'], $sSearchText, $aMatches))
-			{
-				$sPatternFound = $sPatName;
-				break;
-			}			
-		}
-		
-		switch($sPatternFound)
-		{
-			case 'between':
-			
-			$sParamName1 = $oField->GetParent().'_'.$oField->GetName().'_1';
-			$oRightExpr = new VariableExpression($sParamName1);
-			if ($bParseSearchString)
-			{
-				$aParams[$sParamName1] = $this->ParseSearchString($aMatches[1]);
-			}
-			else
-			{
-			$aParams[$sParamName1] = $aMatches[1];
-			}
-			$oCondition1 = new BinaryExpression($oField, '>=', $oRightExpr);
-
-			$sParamName2 = $oField->GetParent().'_'.$oField->GetName().'_2';
-			$oRightExpr = new VariableExpression($sParamName2);
-			if ($bParseSearchString)
-			{
-				$aParams[$sParamName2] = $this->ParseSearchString($aMatches[2]);
-			}
-			else
-			{
-			$aParams[$sParamName2] = $aMatches[2];
-			}
-			$oCondition2 = new BinaryExpression($oField, '<=', $oRightExpr);
-			
-			$oNewCondition = new BinaryExpression($oCondition1, 'AND', $oCondition2);
-			break;
-			
-			case 'greater than':
-			case 'greater than or equal':
-			case 'less than':
-			case 'less than or equal':
-			$sSQLOperator = $aPatterns[$sPatternFound]['operator'];
-			$sParamName = $oField->GetParent().'_'.$oField->GetName();
-			$oRightExpr = new VariableExpression($sParamName);
-			if ($bParseSearchString)
-			{
-				$aParams[$sParamName] = $this->ParseSearchString($aMatches[1]);
-			}
-			else
-			{
-			$aParams[$sParamName] = $aMatches[1];
-			}
-			$oNewCondition = new BinaryExpression($oField, $sSQLOperator, $oRightExpr);
-			
-			break;
-						
-			default:
-			$oNewCondition = parent::GetSmartConditionExpression($sSearchText, $oField, $aParams);
-
-		}
-
-		return $oNewCondition;
-	}
-
-
-	public function GetHelpOnSmartSearch()
-	{
-		$sDict = parent::GetHelpOnSmartSearch();
-		
-		$oFormat = static::GetFormat();
-		$sExample = $oFormat->Format(new DateTime('2015-07-19 18:40:00'));
-		return vsprintf($sDict, array($oFormat->ToPlaceholder(), $sExample));
-	}	
-}
-
-/**
- * Store a duration as a number of seconds 
- *
- * @package	 iTopORM
- */
-class AttributeDuration extends AttributeInteger
-{
-	public function GetEditClass() {return "Duration";}
-	protected function GetSQLCol($bFullSpec = false) {return "INT(11) UNSIGNED";}
-
-	public function GetNullValue() {return '0';}
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return null;
-		if (!is_numeric($proposedValue)) return null;
-		if ( ((int)$proposedValue) < 0) return null;
-
-		return (int)$proposedValue;
-	}
-
-	public function ScalarToSQL($value)
-	{
-		if (is_null($value))
-		{	
-			return null;
-		}
-		return $value;
-	}
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		return Str::pure2html(self::FormatDuration($value));
-	}
-
-	public static function FormatDuration($duration)
-	{
-		$aDuration = self::SplitDuration($duration);
-
-		if ($duration < 60)
-		{
-			// Less than 1 min
-			$sResult = Dict::Format('Core:Duration_Seconds', $aDuration['seconds']);			
-		}
-		else if ($duration < 3600)
-		{
-			// less than 1 hour, display it in minutes/seconds
-			$sResult = Dict::Format('Core:Duration_Minutes_Seconds', $aDuration['minutes'], $aDuration['seconds']);			
-		}
-		else if ($duration < 86400)
-		{
-			// Less than 1 day, display it in hours/minutes/seconds	
-			$sResult = Dict::Format('Core:Duration_Hours_Minutes_Seconds', $aDuration['hours'], $aDuration['minutes'], $aDuration['seconds']);			
-		}
-		else
-		{
-			// more than 1 day, display it in days/hours/minutes/seconds
-			$sResult = Dict::Format('Core:Duration_Days_Hours_Minutes_Seconds', $aDuration['days'], $aDuration['hours'], $aDuration['minutes'], $aDuration['seconds']);			
-		}
-		return $sResult;
-	}
-	
-	static function SplitDuration($duration)
-	{
-		$duration = (int) $duration;
-		$days = floor($duration / 86400);
-		$hours = floor(($duration - (86400*$days)) / 3600);
-		$minutes = floor(($duration - (86400*$days + 3600*$hours)) / 60);
-		$seconds = ($duration % 60); // modulo
-		return array( 'days' => $days, 'hours' => $hours, 'minutes' => $minutes, 'seconds' => $seconds );		
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\DurationField';
-	}
-
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-		parent::MakeFormField($oObject, $oFormField);
-
-		// Note : As of today, this attribute is -by nature- only supported in readonly mode, not edition
-		$sAttCode = $this->GetCode();
-		$oFormField->SetCurrentValue($oObject->Get($sAttCode));
-		$oFormField->SetReadOnly(true);
-
-		return $oFormField;
-	}
-
-}
-/**
- * Map a date+time column to an attribute 
- *
- * @package	 iTopORM
- */
-class AttributeDate extends AttributeDateTime
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_DATE;
-
-	static $oDateFormat = null;
-	
-	static public function GetFormat()
-	{
-		if (self::$oDateFormat == null)
-		{			
-			AttributeDateTime::LoadFormatFromConfig();		
-		}
-		return self::$oDateFormat;
-	}
-
-	static public function SetFormat(DateTimeFormat $oDateFormat)
-	{
-		self::$oDateFormat = $oDateFormat;
-	}
-
-	/**
-	 * Returns the format string used for the date & time stored in memory
-	 * @return string
-	 */
-	static public function GetInternalFormat()
-	{
-		return 'Y-m-d';
-	}
-
-	/**
-	 * Returns the format string used for the date & time written to MySQL
-	 * @return string
-	 */
-	static public function GetSQLFormat()
-	{
-		return 'Y-m-d';
-	}
-	
-	static public function ListExpectedParams()
-	{
-		return parent::ListExpectedParams();
-		//return array_merge(parent::ListExpectedParams(), array());
-	}
-
-	public function GetEditClass() {return "Date";}
-	protected function GetSQLCol($bFullSpec = false) {return "DATE";}
-	public function GetImportColumns()
-	{
-		// Allow an empty string to be a valid value (synonym for "reset")
-		$aColumns = array();
-		$aColumns[$this->GetCode()] = 'VARCHAR(10)';
-		return $aColumns;
-	}
-
-
-	/**
-	 * Override to specify Field class
-	 *
-	 * When called first, $oFormField is null and will be created (eg. Make). Then when the ::parent is called and the $oFormField is passed, MakeFormField behave more like a Prepare.
-	 */
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		$oFormField = parent::MakeFormField($oObject, $oFormField);
-		$oFormField->SetDateOnly(true);
-		
-		return $oFormField;
-	}
-	
-}
-
-/**
- * A dead line stored as a date & time
- * The only difference with the DateTime attribute is the display:
- * relative to the current time
- */
-class AttributeDeadline extends AttributeDateTime
-{
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		$sResult = self::FormatDeadline($value);
-		return $sResult;
-	}
-
-	public static function FormatDeadline($value)
-	{
-		$sResult = '';
-		if ($value !== null)
-		{
-			$iValue = AttributeDateTime::GetAsUnixSeconds($value);
-			$sDate = AttributeDateTime::GetFormat()->Format($value);
-			$difference = $iValue - time();
-	
-			if ($difference >= 0)
-			{
-				$sDifference = self::FormatDuration($difference);
-			}
-			else
-			{
-				$sDifference = Dict::Format('UI:DeadlineMissedBy_duration', self::FormatDuration(-$difference));
-			}
-			$sFormat = MetaModel::GetConfig()->Get('deadline_format');
-			$sResult = str_replace(array('$date$', '$difference$'), array($sDate, $sDifference), $sFormat);
-		}
-
-		return $sResult;
-	}
-
-	static function FormatDuration($duration)
-	{
-		$days = floor($duration / 86400);
-		$hours = floor(($duration - (86400*$days)) / 3600);
-		$minutes = floor(($duration - (86400*$days + 3600*$hours)) / 60);
-
-		if ($duration < 60)
-		{
-			// Less than 1 min
-			$sResult =Dict::S('UI:Deadline_LessThan1Min');			
-		}
-		else if ($duration < 3600)
-		{
-			// less than 1 hour, display it in minutes
-			$sResult =Dict::Format('UI:Deadline_Minutes', $minutes);			
-		}
-		else if ($duration < 86400)
-		{
-			// Less that 1 day, display it in hours/minutes	
-			$sResult =Dict::Format('UI:Deadline_Hours_Minutes', $hours, $minutes);			
-		}
-		else
-		{
-			// Less that 1 day, display it in hours/minutes	
-			$sResult =Dict::Format('UI:Deadline_Days_Hours_Minutes', $days, $hours, $minutes);			
-		}
-		return $sResult;
-	}
-}
-
-/**
- * Map a foreign key to an attribute 
- *  AttributeExternalKey and AttributeExternalField may be an external key
- *  the difference is that AttributeExternalKey corresponds to a column into the defined table
- *  where an AttributeExternalField corresponds to a column into another table (class)
- *
- * @package	 iTopORM
- */
-class AttributeExternalKey extends AttributeDBFieldVoid
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_EXTERNAL_KEY;
-
-
-	/**
-	 * Return the search widget type corresponding to this attribute
-	 *
-	 * @return string
-	 */
-	public function GetSearchType()
-	{
-		try
-		{
-			$oRemoteAtt = $this->GetFinalAttDef();
-			$sTargetClass = $oRemoteAtt->GetTargetClass();
-			if (MetaModel::IsHierarchicalClass($sTargetClass))
-			{
-				return self::SEARCH_WIDGET_TYPE_HIERARCHICAL_KEY;
-			}
-			return self::SEARCH_WIDGET_TYPE_EXTERNAL_KEY;
-		}
-		catch (CoreException $e)
-		{
-		}
-
-		return self::SEARCH_WIDGET_TYPE_RAW;
-	}
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("targetclass", "is_null_allowed", "on_target_delete"));
-	}
-
-	public function GetEditClass() {return "ExtKey";}
-	protected function GetSQLCol($bFullSpec = false) {return "INT(11)".($bFullSpec ? " DEFAULT 0" : "");}
-	public function RequiresIndex()
-	{
-		return true;
-	}
-
-	public function IsExternalKey($iType = EXTKEY_RELATIVE) {return true;}
-	public function GetTargetClass($iType = EXTKEY_RELATIVE) {return $this->Get("targetclass");}
-	public function GetKeyAttDef($iType = EXTKEY_RELATIVE){return $this;}
-	public function GetKeyAttCode() {return $this->GetCode();} 
-	public function GetDisplayStyle() { return $this->GetOptional('display_style', 'select'); }
-	
-
-	public function GetDefaultValue(DBObject $oHostObject = null) {return 0;}
-	public function IsNullAllowed()
-	{
-		if (MetaModel::GetConfig()->Get('disable_mandatory_ext_keys'))
-		{
-			return true;
-		}
-		return $this->Get("is_null_allowed");
-	}
-
-
-	public function GetBasicFilterOperators()
-	{
-		return parent::GetBasicFilterOperators();
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return parent::GetBasicFilterLooseOperator();
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		return parent::GetBasicFilterSQLExpr($sOpCode, $value);
-	} 
-
-	// overloaded here so that an ext key always have the answer to
-	// "what are your possible values?"
-	public function GetValuesDef()
-	{
-		$oValSetDef = $this->Get("allowed_values");
-		if (!$oValSetDef)
-		{
-			// Let's propose every existing value
-			$oValSetDef = new ValueSetObjects('SELECT '.$this->GetTargetClass());
-		}
-		return $oValSetDef;
-	}
-
-	public function GetAllowedValues($aArgs = array(), $sContains = '')
-	{
-		//throw new Exception("GetAllowedValues on ext key has been deprecated");
-		try
-		{
-			return parent::GetAllowedValues($aArgs, $sContains);
-		}
-		catch (Exception $e)
-		{
-			// Some required arguments could not be found, enlarge to any existing value
-			$oValSetDef = new ValueSetObjects('SELECT '.$this->GetTargetClass());
-			return $oValSetDef->GetValues($aArgs, $sContains);
-		}
-	}
-
-	public function GetAllowedValuesAsObjectSet($aArgs = array(), $sContains = '', $iAdditionalValue = null)
-	{
-		$oValSetDef = $this->GetValuesDef();
-		$oSet = $oValSetDef->ToObjectSet($aArgs, $sContains, $iAdditionalValue);
-		return $oSet;
-	}
-
-	public function GetAllowedValuesAsFilter($aArgs = array(), $sContains = '', $iAdditionalValue = null)
-	{
-		return DBObjectSearch::FromOQL($this->GetValuesDef()->GetFilterExpression());
-	}
-
-	public function GetDeletionPropagationOption()
-	{
-		return $this->Get("on_target_delete");
-	}
-
-	public function GetNullValue()
-	{
-		return 0;
-	} 
-
-	public function IsNull($proposedValue)
-	{
-		return ($proposedValue == 0);
-	} 
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return 0;
-		if ($proposedValue === '') return 0;
-		if (MetaModel::IsValidObject($proposedValue)) return $proposedValue->GetKey();
-		return (int)$proposedValue;
-	}
-	
-	public function GetMaximumComboLength()
-	{
-		return $this->GetOptional('max_combo_length', MetaModel::GetConfig()->Get('max_combo_length'));
-	}
-	
-	public function GetMinAutoCompleteChars()
-	{
-		return $this->GetOptional('min_autocomplete_chars', MetaModel::GetConfig()->Get('min_autocomplete_chars'));
-	}
-	
-	public function AllowTargetCreation()
-	{
-		return $this->GetOptional('allow_target_creation', MetaModel::GetConfig()->Get('allow_target_creation'));
-	}
-
-	/**
-	 * Find the corresponding "link" attribute on the target class, if any
-	 * @return null | AttributeDefinition
-	 * @throws \CoreException
-	 */
-	public function GetMirrorLinkAttribute()
-	{
-		$oRet = null;
-		$sRemoteClass = $this->GetTargetClass();
-		foreach (MetaModel::ListAttributeDefs($sRemoteClass) as $sRemoteAttCode => $oRemoteAttDef)
-		{
-			if (!$oRemoteAttDef->IsLinkSet()) continue;
-			if (!is_subclass_of($this->GetHostClass(), $oRemoteAttDef->GetLinkedClass()) && $oRemoteAttDef->GetLinkedClass() != $this->GetHostClass()) continue;
-			if ($oRemoteAttDef->GetExtKeyToMe() != $this->GetCode()) continue;
-			$oRet = $oRemoteAttDef;
-			break;
-		}
-		return $oRet;
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\SelectObjectField';
-	}
-
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			// Later : We should check $this->Get('display_style') and create a Radio / Select / ... regarding its value
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-		
-		// Setting params
-		$oFormField->SetMaximumComboLength($this->GetMaximumComboLength());
-		$oFormField->SetMinAutoCompleteChars($this->GetMinAutoCompleteChars());
-		$oFormField->SetHierarchical(MetaModel::IsHierarchicalClass($this->GetTargetClass()));
-		// Setting choices regarding the field dependencies
-		$aFieldDependencies = $this->GetPrerequisiteAttributes();
-		if (!empty($aFieldDependencies))
-		{
-			$oTmpAttDef = $this;
-			$oTmpField = $oFormField;
-			$oFormField->SetOnFinalizeCallback(function() use ($oTmpField, $oTmpAttDef, $oObject)
-			{
-			    /** @var $oTmpField \Combodo\iTop\Form\Field\Field */
-			    /** @var $oTmpAttDef \AttributeDefinition */
-			    /** @var $oObject \DBObject */
-
-				// We set search object only if it has not already been set (overrided)
-				if ($oTmpField->GetSearch() === null)
-				{
-					$oSearch = DBSearch::FromOQL($oTmpAttDef->GetValuesDef()->GetFilterExpression());
-					$oSearch->SetInternalParams(array('this' => $oObject));
-					$oTmpField->SetSearch($oSearch);
-				}
-			});
-		}
-		else
-		{
-			$oSearch = DBSearch::FromOQL($this->GetValuesDef()->GetFilterExpression());
-			$oSearch->SetInternalParams(array('this' => $oObject));
-			$oFormField->SetSearch($oSearch);
-		}
-
-		// If ExtKey is mandatory, we add a validator to ensure that the value 0 is not selected
-		if ($oObject->GetAttributeFlags($this->GetCode()) & OPT_ATT_MANDATORY)
-		{
-			$oFormField->AddValidator(new \Combodo\iTop\Form\Validator\NotEmptyExtKeyValidator());
-		}
-
-		parent::MakeFormField($oObject, $oFormField);
-
-		return $oFormField;
-	}
-
-}
-
-/**
- * Special kind of External Key to manage a hierarchy of objects
- */
-class AttributeHierarchicalKey extends AttributeExternalKey
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_HIERARCHICAL_KEY;
-
-	protected $m_sTargetClass;
-
-	static public function ListExpectedParams()
-	{
-		$aParams = parent::ListExpectedParams();
-		$idx = array_search('targetclass', $aParams);
-		unset($aParams[$idx]);
-		$idx = array_search('jointype', $aParams);
-		unset($aParams[$idx]);
-		return $aParams; // Later: mettre les bons parametres ici !!
-	}
-
-	public function GetEditClass() {return "ExtKey";}
-	public function RequiresIndex()
-	{
-		return true;
-	}
-
-	/*
-	*  The target class is the class for which the attribute has been defined first
-	*/
-	public function SetHostClass($sHostClass)
-	{
-		if (!isset($this->m_sTargetClass))
-		{
-			$this->m_sTargetClass = $sHostClass;
-		}
-		parent::SetHostClass($sHostClass);
-	}
-
-	static public function IsHierarchicalKey() {return true;}
-	public function GetTargetClass($iType = EXTKEY_RELATIVE) {return $this->m_sTargetClass;}
-	public function GetKeyAttDef($iType = EXTKEY_RELATIVE){return $this;}
-	public function GetKeyAttCode() {return $this->GetCode();}
-
-	public function GetBasicFilterOperators()
-	{
-		return parent::GetBasicFilterOperators();
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return parent::GetBasicFilterLooseOperator();
-	}
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->GetCode()] = 'INT(11)'.($bFullSpec ? ' DEFAULT 0' : '');
-		$aColumns[$this->GetSQLLeft()] = 'INT(11)'.($bFullSpec ? ' DEFAULT 0' : '');
-		$aColumns[$this->GetSQLRight()] = 'INT(11)'.($bFullSpec ? ' DEFAULT 0' : '');
-		return $aColumns;
-	}
-	public function GetSQLRight()
-	{
-		return $this->GetCode().'_right';
-	}
-	public function GetSQLLeft()
-	{
-		return $this->GetCode().'_left';
-	}
-
-	public function GetSQLValues($value)
-	{
-		if (!is_array($value))
-		{
-			$aValues[$this->GetCode()] = $value;
-		}
-		else
-		{
-			$aValues = array();
-			$aValues[$this->GetCode()] = $value[$this->GetCode()];
-			$aValues[$this->GetSQLRight()] = $value[$this->GetSQLRight()];
-			$aValues[$this->GetSQLLeft()] = $value[$this->GetSQLLeft()];
-		}
-		return $aValues;
-	}
-
-	public function GetAllowedValues($aArgs = array(), $sContains = '')
-	{
-		$oFilter = $this->GetHierachicalFilter($aArgs, $sContains);
-		if ($oFilter)
-		{
-			$oValSetDef = $this->GetValuesDef();
-			$oValSetDef->AddCondition($oFilter);
-			return $oValSetDef->GetValues($aArgs, $sContains);
-		}
-		else
-		{
-			return parent::GetAllowedValues($aArgs, $sContains);
-		}
-	}
-
-	public function GetAllowedValuesAsObjectSet($aArgs = array(), $sContains = '', $iAdditionalValue = null)
-	{
-		$oValSetDef = $this->GetValuesDef();
-		$oFilter = $this->GetHierachicalFilter($aArgs, $sContains, $iAdditionalValue);
-		if ($oFilter)
-		{
-			$oValSetDef->AddCondition($oFilter);
-		}
-		$oSet = $oValSetDef->ToObjectSet($aArgs, $sContains, $iAdditionalValue);
-		return $oSet;
-	}
-
-	public function GetAllowedValuesAsFilter($aArgs = array(), $sContains = '', $iAdditionalValue = null)
-	{
-		$oFilter = $this->GetHierachicalFilter($aArgs, $sContains, $iAdditionalValue);
-		if ($oFilter)
-		{
-			return $oFilter;
-		}
-		return parent::GetAllowedValuesAsFilter($aArgs, $sContains, $iAdditionalValue);
-	}
-
-	private function GetHierachicalFilter($aArgs = array(), $sContains = '', $iAdditionalValue = null)
-	{
-		if (array_key_exists('this', $aArgs))
-		{
-			// Hierarchical keys have one more constraint: the "parent value" cannot be
-			// "under" themselves
-			$iRootId = $aArgs['this']->GetKey();
-			if ($iRootId > 0) // ignore objects that do no exist in the database...
-			{
-				$sClass = $this->m_sTargetClass;
-				return DBObjectSearch::FromOQL("SELECT $sClass AS node JOIN $sClass AS root ON node.".$this->GetCode()." NOT BELOW root.id WHERE root.id = $iRootId");
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * Find the corresponding "link" attribute on the target class, if any
-	 * @return null | AttributeDefinition
-	 */
-	public function GetMirrorLinkAttribute()
-	{
-		return null;
-	}
-}
-
-/**
- * An attribute which corresponds to an external key (direct or indirect) 
- *
- * @package	 iTopORM
- */
-class AttributeExternalField extends AttributeDefinition
-{
-	/**
-	 * Return the search widget type corresponding to this attribute
-	 *
-	 * @return string
-	 * @throws \CoreException
-	 */
-	public function GetSearchType()
-	{
-		// Not necessary the external key is already present
-		if ($this->IsFriendlyName())
-		{
-			return self::SEARCH_WIDGET_TYPE_RAW;
-		}
-
-		try
-		{
-			$oRemoteAtt = $this->GetFinalAttDef();
-			switch (true)
-			{
-				case ($oRemoteAtt instanceof AttributeString):
-					return self::SEARCH_WIDGET_TYPE_EXTERNAL_FIELD;
-				case ($oRemoteAtt instanceof AttributeExternalKey):
-					return self::SEARCH_WIDGET_TYPE_EXTERNAL_KEY;
-			}
-		}
-		catch (CoreException $e)
-		{
-		}
-
-		return self::SEARCH_WIDGET_TYPE_RAW;
-	}
-
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("extkey_attcode", "target_attcode"));
-	}
-
-	public function GetEditClass() {return "ExtField";}
-
-	/**
-	 * @return \AttributeDefinition
-	 * @throws \CoreException
-	 */
-	public function GetFinalAttDef()
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetFinalAttDef(); 
-	}
-
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		// throw new CoreException("external attribute: does it make any sense to request its type ?");  
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetSQLCol($bFullSpec); 
-	}
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		if ($sPrefix == '')
-		{
-			return array('' => $this->GetCode()); // Warning: Use GetCode() since AttributeExternalField does not have any 'sql' property
-		}
-		else
-		{
-			return $sPrefix;
-		} 
-	}
-
-	public function GetLabel($sDefault = null)
-	{
-		if ($this->IsFriendlyName())
-		{
-			$sKeyAttCode = $this->Get("extkey_attcode");
-			$oExtKeyAttDef = MetaModel::GetAttributeDef($this->GetHostClass(), $sKeyAttCode);
-			$sLabel = $oExtKeyAttDef->GetLabel($this->m_sCode);
-		}
-		else
-		{
-			$sLabel = parent::GetLabel('');
-			if (strlen($sLabel) == 0)
-			{
-				$oRemoteAtt = $this->GetExtAttDef();
-				$sLabel = $oRemoteAtt->GetLabel($this->m_sCode);
-			}
-		}
-		return $sLabel;
-	}
-
-	public function GetLabelForSearchField()
-	{
-		$sLabel = parent::GetLabel('');
-		if (strlen($sLabel) == 0)
-		{
-			$sKeyAttCode = $this->Get("extkey_attcode");
-			$oExtKeyAttDef = MetaModel::GetAttributeDef($this->GetHostClass(), $sKeyAttCode);
-			$sLabel = $oExtKeyAttDef->GetLabel($this->m_sCode);
-
-			$oRemoteAtt = $this->GetExtAttDef();
-			$sLabel .= '->'.$oRemoteAtt->GetLabel($this->m_sCode);
-		}
-
-		return $sLabel;
-	}
-
-	public function GetDescription($sDefault = null)
-	{
-		$sLabel = parent::GetDescription('');
-		if (strlen($sLabel) == 0)
-		{
-			$oRemoteAtt = $this->GetExtAttDef();
-			$sLabel = $oRemoteAtt->GetDescription('');
-		}
-		return $sLabel;
-	} 
-	public function GetHelpOnEdition($sDefault = null)
-	{
-		$sLabel = parent::GetHelpOnEdition('');
-		if (strlen($sLabel) == 0)
-		{
-			$oRemoteAtt = $this->GetExtAttDef();
-			$sLabel = $oRemoteAtt->GetHelpOnEdition('');
-		}
-		return $sLabel;
-	} 
-
-	public function IsExternalKey($iType = EXTKEY_RELATIVE)
-	{
-		switch($iType)
-		{
-		case EXTKEY_ABSOLUTE:
-			// see further
-			$oRemoteAtt = $this->GetExtAttDef();
-			return $oRemoteAtt->IsExternalKey($iType);
-
-		case EXTKEY_RELATIVE:
-			return false;
-
-		default:
-			throw new CoreException("Unexpected value for argument iType: '$iType'");
-		}
-	}
-
-	/**
-	 * @return bool
-	 * @throws \CoreException
-	 */
-	public function IsFriendlyName()
-	{
-		$oRemoteAtt = $this->GetExtAttDef();
-		if ($oRemoteAtt instanceof AttributeExternalField)
-		{
-			$bRet = $oRemoteAtt->IsFriendlyName();
-		}
-		elseif ($oRemoteAtt instanceof  AttributeFriendlyName)
-		{
-			$bRet = true;
-		}
-		else
-		{
-			$bRet = false;
-		}
-		return $bRet;
-	}
-
-	public function GetTargetClass($iType = EXTKEY_RELATIVE)
-	{
-		return $this->GetKeyAttDef($iType)->GetTargetClass();
-	}
-
-	static public function IsExternalField() {return true;}
-
-	public function GetKeyAttCode()
-	{
-		return $this->Get("extkey_attcode");
-	}
-
-	public function GetExtAttCode()
-	{
-		return $this->Get("target_attcode");
-	}
-
-	/**
-	 * @param int $iType
-	 *
-	 * @return \AttributeExternalKey
-	 * @throws \CoreException
-	 * @throws \Exception
-	 */
-	public function GetKeyAttDef($iType = EXTKEY_RELATIVE)
-	{
-		switch($iType)
-		{
-		case EXTKEY_ABSOLUTE:
-			// see further
-			/** @var \AttributeExternalKey $oRemoteAtt */
-			$oRemoteAtt = $this->GetExtAttDef();
-			if ($oRemoteAtt->IsExternalField())
-			{
-				return $oRemoteAtt->GetKeyAttDef(EXTKEY_ABSOLUTE);
-			}
-			else if ($oRemoteAtt->IsExternalKey())
-			{
-				return $oRemoteAtt;
-			}
-			return $this->GetKeyAttDef(EXTKEY_RELATIVE); // which corresponds to the code hereafter !
-
-		case EXTKEY_RELATIVE:
-            /** @var \AttributeExternalKey $oAttDef */
-			$oAttDef = MetaModel::GetAttributeDef($this->GetHostClass(), $this->Get("extkey_attcode"));
-			return $oAttDef;
-
-		default:
-			throw new CoreException("Unexpected value for argument iType: '$iType'");
-		}
-	}
-	
-	public function GetPrerequisiteAttributes($sClass = null)
-	{
-		return array($this->Get("extkey_attcode"));
-	}
-
-
-	/**
-	 * @return \AttributeExternalField
-	 * @throws \CoreException
-	 * @throws \Exception
-	 */
-	public function GetExtAttDef()
-	{
-		$oKeyAttDef = $this->GetKeyAttDef();
-		/** @var \AttributeExternalField $oExtAttDef */
-		$oExtAttDef = MetaModel::GetAttributeDef($oKeyAttDef->GetTargetClass(), $this->Get("target_attcode"));
-		if (!is_object($oExtAttDef)) throw new CoreException("Invalid external field ".$this->GetCode()." in class ".$this->GetHostClass().". The class ".$oKeyAttDef->GetTargetClass()." has no attribute ".$this->Get("target_attcode"));
-		return $oExtAttDef;
-	}
-
-	/**
-	 * @return mixed
-	 * @throws \CoreException
-	 */
-	public function GetSQLExpr()
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetSQLExpr(); 
-	} 
-
-	public function GetDefaultValue(DBObject $oHostObject = null)
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetDefaultValue();
-	}
-	public function IsNullAllowed()
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->IsNullAllowed(); 
-	}
-
-	static public function IsScalar()
-	{
-		return true;
-	}
-
-	public function GetFilterDefinitions()
-	{
-		return array($this->GetCode() => new FilterFromAttribute($this));
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetBasicFilterOperators(); 
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetBasicFilterLooseOperator(); 
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetBasicFilterSQLExpr($sOpCode, $value);
-	} 
-
-	public function GetNullValue()
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetNullValue();
-	} 
-
-	public function IsNull($proposedValue)
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->IsNull($proposedValue);
-	} 
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->MakeRealValue($proposedValue, $oHostObj);
-	}
-
-	public function ScalarToSQL($value)
-	{
-		// This one could be used in case of filtering only
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->ScalarToSQL($value);
-	}
-
-
-	// Do not overload GetSQLExpression here because this is handled in the joins
-	//public function GetSQLExpressions($sPrefix = '') {return array();}
-
-	// Here, we get the data...
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->FromSQLToValue($aCols, $sPrefix);
-	}
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetAsHTML($value, null, $bLocalize);
-	}
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetAsXML($value, null, $bLocalize);
-	}
-	public function GetAsCSV($value, $sSeparator = ',', $sTestQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		$oExtAttDef = $this->GetExtAttDef();
-		return $oExtAttDef->GetAsCSV($value, $sSeparator, $sTestQualifier, null, $bLocalize, $bConvertToPlainText);
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\LabelField';
-	}
-
-	/**
-	 * @param \DBObject $oObject
-	 * @param \Combodo\iTop\Form\Field\Field $oFormField
-	 *
-	 * @return null
-	 * @throws \CoreException
-	 */
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-	    // Retrieving AttDef from the remote attribute
-        $oRemoteAttDef = $this->GetExtAttDef();
-
-        if ($oFormField === null)
-		{
-		    // ExternalField's FormField are actually based on the FormField from the target attribute.
-            // Except for the AttributeExternalKey because we have no OQL and stuff
-            if($oRemoteAttDef instanceof AttributeExternalKey)
-            {
-                $sFormFieldClass = static::GetFormFieldClass();
-            }
-            else
-            {
-                $sFormFieldClass = $oRemoteAttDef::GetFormFieldClass();
-            }
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-		parent::MakeFormField($oObject, $oFormField);
-
-        // Manually setting for remote ExternalKey, otherwise, the id would be displayed.
-		if($oRemoteAttDef instanceof AttributeExternalKey)
-        {
-            $oFormField->SetCurrentValue($oObject->Get($this->GetCode().'_friendlyname'));
-        }
-
-		// Readonly field because we can't update external fields
-		$oFormField->SetReadOnly(true);
-
-		return $oFormField;
-	}
-
-	public function IsPartOfFingerprint()
-	{
-		return false;
-	}
-
-}
-
-
-/**
- * Multi value list of tags
- *
- * @see TagSetFieldData
- * @since 2.6 N°931 tag fields
- */
-class AttributeTagSet extends AttributeDBFieldVoid
-{
-    const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-    static public function ListExpectedParams()
-    {
-        return array_merge(parent::ListExpectedParams(), array("is_null_allowed"));
-    }
-    public function GetDefaultValue(DBObject $oHostObject = null) {return null;}
-    public function IsNullAllowed() {return $this->Get("is_null_allowed");}
-
-    public function GetEditClass() {
-        return "String";
-    }
-
-    public function GetEditValue($value, $oHostObj = null)
-    {
-        if (empty($value))
-        {
-            return '';
-        }
-        if ($value instanceof ormTagSet)
-        {
-            $aValues = $value->GetValue();
-            return implode(' ', $aValues);
-        }
-        return '';
-    }
-
-    protected function GetSQLCol($bFullSpec = false)
-    {
-        return 'VARCHAR(255)'
-            .CMDBSource::GetSqlStringColumnDefinition()
-            .($bFullSpec ? $this->GetSQLColSpec() : '');
-    }
-
-    public function GetMaxSize()
-    {
-        return 255;
-    }
-
-    public function RequiresIndex() {return true;}
-
-	public function RequiresFullTextIndex() {return true;}
-
-    public function Equals($val1, $val2) {
-        if (($val1 instanceof ormTagSet) && ($val2 instanceof ormTagSet))
-        {
-            return $val1->Equals($val2);
-        }
-        return ($val1 == $val2);
-    }
-
-    /**
-     * force an allowed value (type conversion and possibly forces a value as mySQL would do upon writing!
-     *
-     * @param $proposedValue
-     * @param $oHostObj
-     *
-     * @return mixed
-     * @throws \Exception
-     */
-    public function MakeRealValue($proposedValue, $oHostObj)
-    {
-        $oTagSet = new ormTagSet(MetaModel::GetAttributeOrigin($this->GetHostClass(), $this->GetCode()), $this->GetCode());
-        if (is_string($proposedValue) && !empty($proposedValue))
-        {
-            $aTagCodes = explode(' ', "$proposedValue");
-            $oTagSet->SetValue($aTagCodes);
-        }
-        elseif ($proposedValue instanceof ormTagSet)
-        {
-            $oTagSet = $proposedValue;
-        }
-        return $oTagSet;
-    }
-
-    /**
-     * Get the value from a given string (plain text, CSV import)
-     *
-     * @param string $sProposedValue
-     * @param bool $bLocalizedValue
-     * @param string $sSepItem
-     * @param string $sSepAttribute
-     * @param string $sSepValue
-     * @param string $sAttributeQualifier
-     *
-     * @return mixed null if no match could be found
-     * @throws \Exception
-     */
-    public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
-    {
-        // TODO $bLocalizedValue
-        return $this->MakeRealValue($sProposedValue, null);
-    }
-
-    public function GetNullValue() {
-        return new ormTagSet(MetaModel::GetAttributeOrigin($this->GetHostClass(), $this->GetCode()), $this->GetCode());
-    }
-
-    public function IsNull($proposedValue)
-    {
-        /** @var \ormTagSet $proposedValue */
-        return count($proposedValue->GetValue()) == 0;
-    }
-
-    /**
-     * To be overloaded for localized enums
-     *
-     * @param $sValue
-     *
-     * @return string label corresponding to the given value (in plain text)
-     */
-    public function GetValueLabel($sValue)
-    {
-        // TODO
-        return $sValue;
-    }
-
-    /**
-     * @param $value
-     *
-     * @return string
-     * @throws \CoreWarning
-     */
-    public function ScalarToSQL($value)
-    {
-        if (empty($value))
-        {
-            return '';
-        }
-        if ($value instanceof ormTagSet)
-        {
-            $aValues = $value->GetValue();
-            return implode(' ', $aValues);
-        }
-        throw new CoreWarning('Expected the attribute value to be a string', array('found_type' => gettype($value), 'value' => $value, 'class' => $this->GetHostClass(), 'attribute' => $this->GetCode()));
-    }
-
-	/**
-	 * @param $value
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 *
-	 * @return string|null
-	 *
-	 * @throws \CoreException
-	 * @throws \Exception
-	 */
-    public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-    {
-        if ($value instanceof ormTagSet)
-        {
-            if ($bLocalize)
-            {
-                $aValues = $value->GetLabel();
-            }
-            else
-            {
-                $aValues = $value->GetValue();
-            }
-            if (empty($aValues))
-            {
-                return '';
-            }
-            return '<span class="attribute-tagset">'.implode('</span><span class="attribute-tagset">', $aValues).'</span>';
-        }
-        if (is_string($value))
-        {
-	        try
-	        {
-		        $oValue = $this->MakeRealValue($value, $oHostObject);
-		        return $this->GetAsHTML($oValue, $oHostObject, $bLocalize);
-	        }
-	        catch (Exception $e)
-	        {
-	        	// unknown tags are present display the code instead
-	        }
-	        $aTagCodes = explode(' ', $value);
-	        $aValues = array();
-	        $oTagSet = new ormTagSet(MetaModel::GetAttributeOrigin($this->GetHostClass(), $this->GetCode()), $this->GetCode());
-	        foreach ($aTagCodes as $sTagCode)
-	        {
-		        try
-		        {
-			        $oTagSet->AddTag($sTagCode);
-		        }
-		        catch (Exception $e)
-		        {
-			        $aValues[] = $sTagCode;
-		        }
-	        }
-	        $sHTML = '';
-	        if (!empty($aValues))
-	        {
-		        $sHTML .= '<span class="attribute-tagset-undefined">'.implode('</span><span class="attribute-tagset-undefined">', $aValues).'</span>';
-	        }
-	        $aValues = $oTagSet->GetLabel();
-	        if (!empty($aValues))
-	        {
-		        $sHTML .= '<span class="attribute-tagset">'.implode('</span><span class="attribute-tagset">', $aValues).'</span>';
-	        }
-
-	        return $sHTML;
-        }
-        return parent::GetAsHTML($value, $oHostObject, $bLocalize);
-
-    }
-
-    /**
-     * @param $value
-     * @param \DBObject $oHostObject
-     * @param bool $bLocalize
-     *
-     * @return string
-     *
-     */
-    public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-    {
-        if (is_object($value) && ($value instanceof ormTagSet))
-        {
-            $sRes = "<Set>\n";
-            if ($bLocalize)
-            {
-                $aValues = $value->GetLabel();
-            }
-            else
-            {
-                $aValues = $value->GetValue();
-            }            if (!empty($aValuess))
-            {
-                $sRes .= '<Tag>'.implode('</Tag><Tag>', $aValues).'</Tag>';
-            }
-            $sRes .= "</Set>\n";
-        }
-        else
-        {
-            $sRes = '';
-        }
-        return $sRes;
-    }
-
-    /**
-     * @param $value
-     * @param string $sSeparator
-     * @param string $sTextQualifier
-     * @param \DBObject $oHostObject
-     * @param bool $bLocalize
-     * @param bool $bConvertToPlainText
-     *
-     * @return mixed|string
-     * @throws \CoreException
-     */
-    public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-    {
-        if (is_object($value) && ($value instanceof ormTagSet))
-        {
-            if ($bLocalize)
-            {
-                $aValues = $value->GetLabel();
-            }
-            else
-            {
-                $aValues = $value->GetValue();
-            }
-            $sRes = implode('|', $aValues);
-        }
-        else
-        {
-            $sRes = '';
-        }
-        return $sRes;
-    }
-
-    /**
-     * List the available verbs for 'GetForTemplate'
-     */
-    public function EnumTemplateVerbs()
-    {
-        return array(
-            '' => 'Plain text (unlocalized) representation',
-            'html' => 'HTML representation (unordered list)',
-        );
-    }
-
-    /**
-     * Get various representations of the value, for insertion into a template (e.g. in Notifications)
-     *
-     * @param mixed $value The current value of the field
-     * @param string $sVerb The verb specifying the representation of the value
-     * @param DBObject $oHostObject The object
-     * @param bool $bLocalize Whether or not to localize the value
-     *
-     * @return string
-     * @throws \Exception
-     */
-    public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
-    {
-        if (is_object($value) && ($value instanceof ormTagSet))
-        {
-            if ($bLocalize)
-            {
-                $aValues = $value->GetLabel();
-            }
-            else
-            {
-                $aValues = $value->GetValue();
-            }
-
-            switch ($sVerb)
-            {
-                case '':
-                    return implode(' ', $aValues);
-
-                case 'html':
-                    return '<ul><li>'.implode("</li><li>", $aValues).'</li></ul>';
-
-                default:
-                    throw new Exception("Unknown verb '$sVerb' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
-            }
-        }
-        throw new CoreUnexpectedValue("Bad value '$value' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
-    }
-
-    /**
-     * Helper to get a value that will be JSON encoded
-     * The operation is the opposite to FromJSONToValue
-     *
-     * @param \ormTagSet $value
-     *
-     * @return array
-     * @throws \CoreException
-     */
-    public function GetForJSON($value)
-    {
-        $aRet = array();
-        if (is_object($value) && ($value instanceof ormTagSet))
-        {
-            $aRet = $value->GetValue();
-        }
-        return $aRet;
-    }
-
-    /**
-     * Helper to form a value, given JSON decoded data
-     * The operation is the opposite to GetForJSON
-     *
-     * @param $json
-     *
-     * @return \ormTagSet
-     * @throws \CoreException
-     * @throws \CoreUnexpectedValue
-     * @throws \Exception
-     */
-    public function FromJSONToValue($json)
-    {
-        $oSet = new ormTagSet($this->GetHostClass(), $this->GetCode());
-        $oSet->SetValue($json);
-        return $oSet;
-    }
-
-    /**
-     * The part of the current attribute in the object's signature, for the supplied value
-     * @param mixed $value The value of this attribute for the object
-     * @return string The "signature" for this field/attribute
-     */
-    public function Fingerprint($value)
-    {
-        if ($value instanceof ormTagSet)
-        {
-            $aValues = $value->GetValue();
-            return implode(' ', $aValues);
-        }
-        return parent::Fingerprint($value);
-    }
-
-}
-
-/**
- * Map a varchar column to an URL (formats the ouput in HMTL) 
- *
- * @package	 iTopORM
- */
-class AttributeURL extends AttributeString
-{
-	static public function ListExpectedParams()
-	{
-		//return parent::ListExpectedParams();
-		return array_merge(parent::ListExpectedParams(), array("target"));
-	}
-
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return "VARCHAR(2048)"
-			.CMDBSource::GetSqlStringColumnDefinition()
-			.($bFullSpec ? $this->GetSQLColSpec() : '');
-	}
-
-	public function GetMaxSize()
-	{
-		return 2048;
-	}
-	
-	public function GetEditClass() {return "String";}
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		$sTarget = $this->Get("target");
-		if (empty($sTarget)) $sTarget = "_blank";
-		$sLabel = Str::pure2html($sValue);
-		if (strlen($sLabel) > 128)
-		{
-			// Truncate the length to 128 characters, by removing the middle
-			$sLabel = substr($sLabel, 0, 100).'.....'.substr($sLabel, -20);
-		}
-		return "<a target=\"$sTarget\" href=\"$sValue\">$sLabel</a>";
-	}
-
-	public function GetValidationPattern()
-	{
-		return $this->GetOptional('validation_pattern', '^'.utils::GetConfig()->Get('url_validation_pattern').'$');
-	}
-
-    static public function GetFormFieldClass()
-    {
-        return '\\Combodo\\iTop\\Form\\Field\\UrlField';
-    }
-
-	/**
-	 * @param \DBObject $oObject
-	 * @param  \Combodo\iTop\Form\Field\UrlField $oFormField
-	 *
-	 * @return null
-	 * @throws \CoreException
-	 */
-    public function MakeFormField(DBObject $oObject, $oFormField = null)
-    {
-        if ($oFormField === null)
-        {
-            $sFormFieldClass = static::GetFormFieldClass();
-            $oFormField = new $sFormFieldClass($this->GetCode());
-        }
-        parent::MakeFormField($oObject, $oFormField);
-
-        $oFormField->SetTarget($this->Get('target'));
-
-        return $oFormField;
-    }
-}
-
-/**
- * A blob is an ormDocument, it is stored as several columns in the database  
- *
- * @package	 iTopORM
- */
-class AttributeBlob extends AttributeDefinition
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("depends_on"));
-	}
-
-	public function GetEditClass() {return "Document";}
-
-	static public function IsBasedOnDBColumns() {return true;}
-	static public function IsScalar() {return true;}
-	public function IsWritable() {return true;}
-	public function GetDefaultValue(DBObject $oHostObject = null) {return "";}
-	public function IsNullAllowed(DBObject $oHostObject = null) {return $this->GetOptional("is_null_allowed", false);}
-
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		return '';
-	}
-	
-	/**
-	 * Users can provide the document from an URL (including an URL on iTop itself)
-	 * for CSV import. Administrators can even provide the path to a local file
-	 * {@inheritDoc}
-	 * @see AttributeDefinition::MakeRealValue()
-	 */
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if ($proposedValue === null) return null;
-		
-		if (is_object($proposedValue))
-		{
-			$proposedValue = clone $proposedValue;
-		}
-		else
-		{
-			try
-			{
-				// Read the file from iTop, an URL (or the local file system - for admins only)
-				$proposedValue = Utils::FileGetContentsAndMIMEType($proposedValue);
-			}
-			catch(Exception $e)
-			{
-				IssueLog::Warning(get_class($this)."::MakeRealValue - ".$e->getMessage());
-				// Not a real document !! store is as text !!! (This was the default behavior before)
-				$proposedValue = new ormDocument($e->getMessage()." \n".$proposedValue, 'text/plain');
-			}	
-		}
-		return $proposedValue;
-	}
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		if ($sPrefix == '')
-		{
-			$sPrefix = $this->GetCode();
-		}
-		$aColumns = array();
-		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
-		$aColumns[''] = $sPrefix.'_mimetype';
-		$aColumns['_data'] = $sPrefix.'_data';
-		$aColumns['_filename'] = $sPrefix.'_filename';
-		return $aColumns;
-	}
-
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		if (!array_key_exists($sPrefix, $aCols))
-		{
-			$sAvailable = implode(', ', array_keys($aCols));
-			throw new MissingColumnException("Missing column '$sPrefix' from {$sAvailable}");
-		} 
-		$sMimeType = isset($aCols[$sPrefix]) ? $aCols[$sPrefix] : '';
-
-		if (!array_key_exists($sPrefix.'_data', $aCols)) 
-		{
-			$sAvailable = implode(', ', array_keys($aCols));
-			throw new MissingColumnException("Missing column '".$sPrefix."_data' from {$sAvailable}");
-		} 
-		$data = isset($aCols[$sPrefix.'_data']) ? $aCols[$sPrefix.'_data'] : null;
-
-		if (!array_key_exists($sPrefix.'_filename', $aCols)) 
-		{
-			$sAvailable = implode(', ', array_keys($aCols));
-			throw new MissingColumnException("Missing column '".$sPrefix."_filename' from {$sAvailable}");
-		} 
-		$sFileName =  isset($aCols[$sPrefix.'_filename']) ? $aCols[$sPrefix.'_filename'] : '';
-
-		$value = new ormDocument($data, $sMimeType, $sFileName);
-		return $value;
-	}
-
-	public function GetSQLValues($value)
-	{
-		// #@# Optimization: do not load blobs anytime
-		//	 As per mySQL doc, selecting blob columns will prevent mySQL from
-		//	 using memory in case a temporary table has to be created
-		//	 (temporary tables created on disk)
-		//	 We will have to remove the blobs from the list of attributes when doing the select
-		//	 then the use of Get() should finalize the load
-		if ($value instanceOf ormDocument && !$value->IsEmpty())
-		{
-			$aValues = array();
-			$aValues[$this->GetCode().'_data'] = $value->GetData();
-			$aValues[$this->GetCode().'_mimetype'] = $value->GetMimeType();
-			$aValues[$this->GetCode().'_filename'] = $value->GetFileName();
-		}
-		else
-		{
-			$aValues = array();
-			$aValues[$this->GetCode().'_data'] = '';
-			$aValues[$this->GetCode().'_mimetype'] = '';
-			$aValues[$this->GetCode().'_filename'] = '';
-		}
-		return $aValues;
-	}
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->GetCode().'_data'] = 'LONGBLOB'; // 2^32 (4 Gb)
-		$aColumns[$this->GetCode().'_mimetype'] = 'VARCHAR(255)'.CMDBSource::GetSqlStringColumnDefinition();
-		$aColumns[$this->GetCode().'_filename'] = 'VARCHAR(255)'.CMDBSource::GetSqlStringColumnDefinition();
-		return $aColumns;
-	}
-
-	public function GetFilterDefinitions()
-	{
-		return array();
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array();
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return '=';
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		return 'true';
-	} 
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (is_object($value))
-		{
-			return $value->GetAsHTML();
-		}
-		return '';
-	}
-
-	/**
-	 * @param string $sValue
-	 * @param string $sSeparator
-	 * @param string $sTextQualifier
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 * @param bool $bConvertToPlainText
-	 *
-	 * @return string
-	 */
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		$sAttCode = $this->GetCode();
-		if ($sValue instanceof ormDocument && !$sValue->IsEmpty())
-		{
-			return $sValue->GetDownloadURL(get_class($oHostObject), $oHostObject->GetKey(), $sAttCode);
-		}
-		return ''; // Not exportable in CSV !
-	}
-
-	/**
-	 * @param $value
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 *
-	 * @return mixed|string
-	 */
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		$sRet = '';
-		if (is_object($value))
-		{
-			if (!$value->IsEmpty())
-			{
-				$sRet = '<mimetype>'.$value->GetMimeType().'</mimetype>';
-				$sRet .= '<filename>'.$value->GetFileName().'</filename>';
-				$sRet .= '<data>'.base64_encode($value->GetData()).'</data>';
-			}
-		}
-		return $sRet;
-	}
-
-	/**
-	 * Helper to get a value that will be JSON encoded
-	 * The operation is the opposite to FromJSONToValue	 
-	 */	 	
-	public function GetForJSON($value)
-	{
-		if ($value instanceOf ormDocument)
-		{
-			$aValues = array();
-			$aValues['data'] = base64_encode($value->GetData());
-			$aValues['mimetype'] = $value->GetMimeType();
-			$aValues['filename'] = $value->GetFileName();
-		}
-		else
-		{
-			$aValues = null;
-		}
-		return $aValues;
-	}
-
-	/**
-	 * Helper to form a value, given JSON decoded data
-	 * The operation is the opposite to GetForJSON	 
-	 */	 	
-	public function FromJSONToValue($json)
-	{
-		if (isset($json->data))
-		{
-			$data = base64_decode($json->data);
-			$value = new ormDocument($data, $json->mimetype, $json->filename);
-		}
-		else
-		{
-			$value = null;
-		}
-		return $value;
-	}
-	
-	public function Fingerprint($value)
-	{
-		$sFingerprint = '';
-		if ($value instanceOf ormDocument)
-		{
-			$sFingerprint = md5($value->GetData());
-		}
-		return $sFingerprint;		
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\BlobField';
-	}
-
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-
-		// Note: As of today we want this field to always be read-only
-		$oFormField->SetReadOnly(true);
-
-		// Generating urls
-		$value = $oObject->Get($this->GetCode());
-		$oFormField->SetDownloadUrl($value->GetDownloadURL(get_class($oObject), $oObject->GetKey(), $this->GetCode()));
-		$oFormField->SetDisplayUrl($value->GetDisplayURL(get_class($oObject), $oObject->GetKey(), $this->GetCode()));
-
-		parent::MakeFormField($oObject, $oFormField);
-
-		return $oFormField;
-	}
-
-}
-
-/**
- * An image is a specific type of document, it is stored as several columns in the database
- *
- * @package	 iTopORM
- */
-class AttributeImage extends AttributeBlob
-{
-	public function GetEditClass() {return "Image";}
-
-	/**
-	 * {@inheritDoc}
-	 * @see AttributeBlob::MakeRealValue()
-	 */
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		$oDoc = parent::MakeRealValue($proposedValue, $oHostObj);
-		// The validation of the MIME Type is done by CheckFormat below
-		return $oDoc;
-	}
-	
-	/**
-	 * Check that the supplied ormDocument actually contains an image
-	 * {@inheritDoc}
-	 * @see AttributeDefinition::CheckFormat()
-	 */
-	public function CheckFormat($value)
-	{
-		if ($value instanceof ormDocument && !$value->IsEmpty())
-		{
-			return ($value->GetMainMimeType() == 'image');
-		}
-		return true;
-	}
-	
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		$iMaxWidthPx = $this->Get('display_max_width').'px';
-		$iMaxHeightPx = $this->Get('display_max_height').'px';
-		$sUrl = $this->Get('default_image');
-		$sRet = ($sUrl !== null) ? '<img src="'.$sUrl.'" style="max-width: '.$iMaxWidthPx.'; max-height: '.$iMaxHeightPx.'">' : '';
-		if (is_object($value) && !$value->IsEmpty())
-		{
-			if ($oHostObject->IsNew() || ($oHostObject->IsModified() && (array_key_exists($this->GetCode(), $oHostObject->ListChanges()))))
-			{
-				// If the object is modified (or not yet stored in the database) we must serve the content of the image directly inline
-				// otherwise (if we just give an URL) the browser will be given the wrong content... and may cache it
-				$sUrl = 'data:'.$value->GetMimeType().';base64,'.base64_encode($value->GetData());
-			}
-			else
-			{
-				$sUrl = $value->GetDownloadURL(get_class($oHostObject), $oHostObject->GetKey(), $this->GetCode());
-			}
-			$sRet = '<img src="'.$sUrl.'" style="max-width: '.$iMaxWidthPx.'; max-height: '.$iMaxHeightPx.'">';
-		}
-		return '<div class="view-image" style="width: '.$iMaxWidthPx.'; height: '.$iMaxHeightPx.';"><span class="helper-middle"></span>'.$sRet.'</div>';
-	}
-
-    static public function GetFormFieldClass()
-    {
-        return '\\Combodo\\iTop\\Form\\Field\\ImageField';
-    }
-
-    public function MakeFormField(DBObject $oObject, $oFormField = null)
-    {
-        if ($oFormField === null)
-        {
-            $sFormFieldClass = static::GetFormFieldClass();
-            $oFormField = new $sFormFieldClass($this->GetCode());
-        }
-
-        parent::MakeFormField($oObject, $oFormField);
-
-        // Generating urls
-        $value = $oObject->Get($this->GetCode());
-        if (is_object($value) && !$value->IsEmpty())
-        {
-            $oFormField->SetDownloadUrl($value->GetDownloadURL(get_class($oObject), $oObject->GetKey(), $this->GetCode()));
-            $oFormField->SetDisplayUrl($value->GetDisplayURL(get_class($oObject), $oObject->GetKey(), $this->GetCode()));
-        }
-        else
-        {
-            $oFormField->SetDownloadUrl($this->Get('default_image'));
-            $oFormField->SetDisplayUrl($this->Get('default_image'));
-        }
-
-        return $oFormField;
-    }
-}
-/**
- * A stop watch is an ormStopWatch object, it is stored as several columns in the database  
- *
- * @package	 iTopORM
- */
-class AttributeStopWatch extends AttributeDefinition
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static public function ListExpectedParams()
-	{
-		// The list of thresholds must be an array of iPercent => array of 'option' => value
-		return array_merge(parent::ListExpectedParams(), array("states", "goal_computing", "working_time_computing", "thresholds"));
-	}
-
-	public function GetEditClass() {return "StopWatch";}
-
-	static public function IsBasedOnDBColumns() {return true;}
-	static public function IsScalar() {return true;}
-	public function IsWritable() {return true;}
-	public function GetDefaultValue(DBObject $oHostObject = null) {return $this->NewStopWatch();}
-
-	/**
-	 * @param \ormStopWatch $value
-	 * @param \DBObject $oHostObj
-	 *
-	 * @return string
-	 */
-	public function GetEditValue($value, $oHostObj = null)
-	{
-		return $value->GetTimeSpent();
-	}
-
-	public function GetStates()
-	{
-		return $this->Get('states');
-	}
-
-	public function AlwaysLoadInTables()
-	{
-		// Each and every stop watch is accessed for computing the highlight code (DBObject::GetHighlightCode())
-		return true;
-	}
-
-	/**
-	 * Construct a brand new (but configured) stop watch
-	 */	 	
-	public function NewStopWatch()
-	{
-		$oSW = new ormStopWatch();
-		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-		{
-			$oSW->DefineThreshold($iThreshold);
-		}
-		return $oSW;
-	}
-
-	// Facilitate things: allow the user to Set the value from a string
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (!$proposedValue instanceof ormStopWatch)
-		{
-			return $this->NewStopWatch();
-		}
-		return $proposedValue;
-	}
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		if ($sPrefix == '')
-		{
-			$sPrefix = $this->GetCode(); // Warning: a stopwatch does not have any 'sql' property, so its SQL column is equal to its attribute code !!
-		}
-		$aColumns = array();
-		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
-		$aColumns[''] = $sPrefix.'_timespent';
-		$aColumns['_started'] = $sPrefix.'_started';
-		$aColumns['_laststart'] = $sPrefix.'_laststart';
-		$aColumns['_stopped'] = $sPrefix.'_stopped';
-		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-		{
-			$sThPrefix = '_'.$iThreshold;
-			$aColumns[$sThPrefix.'_deadline'] = $sPrefix.$sThPrefix.'_deadline';
-			$aColumns[$sThPrefix.'_passed'] = $sPrefix.$sThPrefix.'_passed';
-			$aColumns[$sThPrefix.'_triggered'] = $sPrefix.$sThPrefix.'_triggered';
-			$aColumns[$sThPrefix.'_overrun'] = $sPrefix.$sThPrefix.'_overrun';
-		}
-		return $aColumns;
-	}
-
-	public static function DateToSeconds($sDate)
-	{
-		if (is_null($sDate))
-		{
-			return null;
-		}
-		$oDateTime = new DateTime($sDate);
-		$iSeconds = $oDateTime->format('U');
-		return $iSeconds;
-	}
-
-	public static function SecondsToDate($iSeconds)
-	{
-		if (is_null($iSeconds))
-		{
-			return null;
-		}
-		return date("Y-m-d H:i:s", $iSeconds);
-	}
-
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		$aExpectedCols = array($sPrefix, $sPrefix.'_started', $sPrefix.'_laststart', $sPrefix.'_stopped');
-		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-		{
-			$sThPrefix = '_'.$iThreshold;
-			$aExpectedCols[] = $sPrefix.$sThPrefix.'_deadline';
-			$aExpectedCols[] = $sPrefix.$sThPrefix.'_passed';
-			$aExpectedCols[] = $sPrefix.$sThPrefix.'_triggered';
-			$aExpectedCols[] = $sPrefix.$sThPrefix.'_overrun';
-		}
-		foreach ($aExpectedCols as $sExpectedCol)
-		{
-			if (!array_key_exists($sExpectedCol, $aCols))
-			{
-				$sAvailable = implode(', ', array_keys($aCols));
-				throw new MissingColumnException("Missing column '$sExpectedCol' from {$sAvailable}");
-			} 
-		}
-
-		$value = new ormStopWatch(
-			$aCols[$sPrefix],
-			self::DateToSeconds($aCols[$sPrefix.'_started']),
-			self::DateToSeconds($aCols[$sPrefix.'_laststart']),
-			self::DateToSeconds($aCols[$sPrefix.'_stopped'])
-		);
-
-		foreach ($this->ListThresholds() as $iThreshold => $aDefinition)
-		{
-			$sThPrefix = '_'.$iThreshold;
-			$value->DefineThreshold(
-				$iThreshold,
-				self::DateToSeconds($aCols[$sPrefix.$sThPrefix.'_deadline']),
-				(bool)($aCols[$sPrefix.$sThPrefix.'_passed'] == 1),
-				(bool)($aCols[$sPrefix.$sThPrefix.'_triggered'] == 1),
-				$aCols[$sPrefix.$sThPrefix.'_overrun'],
-				array_key_exists('highlight', $aDefinition) ? $aDefinition['highlight'] : null
-			);
-		}
-
-		return $value;
-	}
-
-	public function GetSQLValues($value)
-	{
-		if ($value instanceOf ormStopWatch)
-		{
-			$aValues = array();
-			$aValues[$this->GetCode().'_timespent'] = $value->GetTimeSpent();
-			$aValues[$this->GetCode().'_started'] = self::SecondsToDate($value->GetStartDate());
-			$aValues[$this->GetCode().'_laststart'] = self::SecondsToDate($value->GetLastStartDate());
-			$aValues[$this->GetCode().'_stopped'] = self::SecondsToDate($value->GetStopDate());
-
-			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-			{
-				$sPrefix = $this->GetCode().'_'.$iThreshold;
-				$aValues[$sPrefix.'_deadline'] = self::SecondsToDate($value->GetThresholdDate($iThreshold));
-				$aValues[$sPrefix.'_passed'] = $value->IsThresholdPassed($iThreshold) ? '1' : '0';
-				$aValues[$sPrefix.'_triggered'] = $value->IsThresholdTriggered($iThreshold) ? '1' : '0';
-				$aValues[$sPrefix.'_overrun'] = $value->GetOverrun($iThreshold);
-			}
-		}
-		else
-		{
-			$aValues = array();
-			$aValues[$this->GetCode().'_timespent'] = '';
-			$aValues[$this->GetCode().'_started'] = '';
-			$aValues[$this->GetCode().'_laststart'] = '';
-			$aValues[$this->GetCode().'_stopped'] = '';
-		}
-		return $aValues;
-	}
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->GetCode().'_timespent'] = 'INT(11) UNSIGNED';
-		$aColumns[$this->GetCode().'_started'] = 'DATETIME';
-		$aColumns[$this->GetCode().'_laststart'] = 'DATETIME';
-		$aColumns[$this->GetCode().'_stopped'] = 'DATETIME';
-		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-		{
-			$sPrefix = $this->GetCode().'_'.$iThreshold;
-			$aColumns[$sPrefix.'_deadline'] = 'DATETIME';
-			$aColumns[$sPrefix.'_passed'] = 'TINYINT(1) UNSIGNED';
-			$aColumns[$sPrefix.'_triggered'] = 'TINYINT(1)';
-			$aColumns[$sPrefix.'_overrun'] = 'INT(11) UNSIGNED';
-		}
-		return $aColumns;
-	}
-
-	public function GetFilterDefinitions()
-	{
-		$aRes = array(
-			$this->GetCode() => new FilterFromAttribute($this),
-			$this->GetCode().'_started' => new FilterFromAttribute($this, '_started'),
-			$this->GetCode().'_laststart' => new FilterFromAttribute($this, '_laststart'),
-			$this->GetCode().'_stopped' => new FilterFromAttribute($this, '_stopped')
-		);
-		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-		{
-			$sPrefix = $this->GetCode().'_'.$iThreshold;
-			$aRes[$sPrefix.'_deadline'] = new FilterFromAttribute($this, '_deadline');
-			$aRes[$sPrefix.'_passed'] = new FilterFromAttribute($this, '_passed');
-			$aRes[$sPrefix.'_triggered'] = new FilterFromAttribute($this, '_triggered');
-			$aRes[$sPrefix.'_overrun'] = new FilterFromAttribute($this, '_overrun');
-		}
-		return $aRes;
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array();
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return '=';
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		return 'true';
-	}
-
-	/**
-	 * @param \ormStopWatch $value
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 *
-	 * @return string
-	 */
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (is_object($value))
-		{
-			return $value->GetAsHTML($this, $oHostObject);
-		}
-		return '';
-	}
-
-	/**
-	 * @param ormStopWatch $value
-	 * @param string $sSeparator
-	 * @param string $sTextQualifier
-	 * @param null $oHostObject
-	 * @param bool $bLocalize
-	 * @param bool $bConvertToPlainText
-	 *
-	 * @return string
-	 */
-	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		return $value->GetTimeSpent();
-	}
-
-	/**
-	 * @param \ormStopWatch $value
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 *
-	 * @return mixed
-	 */
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		return $value->GetTimeSpent();
-	}
-
-	public function ListThresholds()
-	{
-		return $this->Get('thresholds');
-	}
-	
-	public function Fingerprint($value)
-	{
-		$sFingerprint = '';
-		if (is_object($value))
-		{
-			$sFingerprint = $value->GetAsHTML($this);
-		}
-		return $sFingerprint;
-	}
-
-	/**
-	 * To expose internal values: Declare an attribute AttributeSubItem
-	 * and implement the GetSubItemXXXX verbs
-	 *
-	 * @param string $sItemCode
-	 *
-	 * @return array
-	 * @throws \CoreException
-	 */
-	public function GetSubItemSQLExpression($sItemCode)
-	{
-		$sPrefix = $this->GetCode();
-		switch($sItemCode)
-		{
-		case 'timespent':
-			return array('' => $sPrefix.'_timespent');
-		case 'started':
-			return array('' => $sPrefix.'_started');
-		case 'laststart':
-			return array('' => $sPrefix.'_laststart');
-		case 'stopped':
-			return array('' => $sPrefix.'_stopped');
-		}
-
-		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-		{
-			$sThPrefix = $iThreshold.'_';
-			if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
-			{
-				// The current threshold is concerned
-				$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
-				switch($sThresholdCode)
-				{
-				case 'deadline':
-					return array('' => $sPrefix.'_'.$iThreshold.'_deadline');
-				case 'passed':
-					return array('' => $sPrefix.'_'.$iThreshold.'_passed');
-				case 'triggered':
-					return array('' => $sPrefix.'_'.$iThreshold.'_triggered');
-				case 'overrun':
-					return array('' => $sPrefix.'_'.$iThreshold.'_overrun');
-				}
-			}
-		}
-		throw new CoreException("Unknown item code '$sItemCode' for attribute ".$this->GetHostClass().'::'.$this->GetCode());
-	}
-
-	/**
-	 * @param string $sItemCode
-	 * @param \ormStopWatch $value
-	 * @param \DBObject $oHostObject
-	 *
-	 * @return mixed
-	 * @throws \CoreException
-	 */
-	public function GetSubItemValue($sItemCode, $value, $oHostObject = null)
-	{
-		$oStopWatch = $value;
-		switch($sItemCode)
-		{
-		case 'timespent':
-			return $oStopWatch->GetTimeSpent();
-		case 'started':
-			return $oStopWatch->GetStartDate();
-		case 'laststart':
-			return $oStopWatch->GetLastStartDate();
-		case 'stopped':
-			return $oStopWatch->GetStopDate();
-		}
-
-		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-		{
-			$sThPrefix = $iThreshold.'_';
-			if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
-			{
-				// The current threshold is concerned
-				$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
-				switch($sThresholdCode)
-				{
-				case 'deadline':
-					return $oStopWatch->GetThresholdDate($iThreshold);
-				case 'passed':
-					return $oStopWatch->IsThresholdPassed($iThreshold);
-				case 'triggered':
-					return $oStopWatch->IsThresholdTriggered($iThreshold);
-				case 'overrun':
-					return $oStopWatch->GetOverrun($iThreshold);
-				}
-			}
-		}
-
-		throw new CoreException("Unknown item code '$sItemCode' for attribute ".$this->GetHostClass().'::'.$this->GetCode());
-	}
-
-	protected function GetBooleanLabel($bValue)
-	{
-		$sDictKey = $bValue ? 'yes' : 'no';
-		return Dict::S('BooleanLabel:'.$sDictKey, 'def:'.$sDictKey);
-	}
-
-	public function GetSubItemAsHTMLForHistory($sItemCode, $sValue)
-	{
-		$sHtml = null;
-		switch($sItemCode)
-		{
-		case 'timespent':
-			$sHtml = (int)$sValue ? Str::pure2html(AttributeDuration::FormatDuration($sValue)) : null;
-			break;
-		case 'started':
-		case 'laststart':
-		case 'stopped':
-			$sHtml = (int)$sValue ? date((string)AttributeDateTime::GetFormat(), (int)$sValue) : null;
-			break;
-
-		default:
-			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-			{
-				$sThPrefix = $iThreshold.'_';
-				if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
-				{
-					// The current threshold is concerned
-					$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
-					switch($sThresholdCode)
-					{
-					case 'deadline':
-						$sHtml = (int)$sValue ? date((string)AttributeDateTime::GetFormat(), (int)$sValue) : null;
-						break;
-					case 'passed':
-						$sHtml = $this->GetBooleanLabel((int)$sValue);
-						break;
-					case 'triggered':
-						$sHtml = $this->GetBooleanLabel((int)$sValue);
-						break;
-					case 'overrun':
-						$sHtml = (int)$sValue > 0 ? Str::pure2html(AttributeDuration::FormatDuration((int)$sValue)) : '';
-					}
-				}
-			}
-		}
-		return $sHtml;
-	}
-
-	public function GetSubItemAsPlainText($sItemCode, $value)
-	{
-		$sRet = $value;
-
-		switch ($sItemCode)
-		{
-			case 'timespent':
-				$sRet = AttributeDuration::FormatDuration($value);
-				break;
-			case 'started':
-			case 'laststart':
-			case 'stopped':
-				if (is_null($value))
-				{
-					$sRet = ''; // Undefined
-				}
-				else
-				{
-					$oDateTime = new DateTime();
-					$oDateTime->setTimestamp($value);
-					$oDateTimeFormat = AttributeDateTime::GetFormat();
-					$sRet = $oDateTimeFormat->Format($oDateTime);
-				}
-				break;
-
-			default:
-				foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-				{
-					$sThPrefix = $iThreshold . '_';
-					if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
-					{
-						// The current threshold is concerned
-						$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
-						switch ($sThresholdCode)
-						{
-							case 'deadline':
-								if ($value)
-								{
-									$sDate = date(AttributeDateTime::GetInternalFormat(), $value);
-									$sRet = AttributeDeadline::FormatDeadline($sDate);
-								}
-								else
-								{
-									$sRet = '';
-								}
-								break;
-							case 'passed':
-							case 'triggered':
-								$sRet = $this->GetBooleanLabel($value);
-								break;
-							case 'overrun':
-								$sRet = AttributeDuration::FormatDuration($value);
-								break;
-						}
-					}
-				}
-		}
-		return $sRet;
-	}
-
-	public function GetSubItemAsHTML($sItemCode, $value)
-	{
-		$sHtml = $value;
-
-		switch ($sItemCode)
-		{
-			case 'timespent':
-				$sHtml = Str::pure2html(AttributeDuration::FormatDuration($value));
-				break;
-			case 'started':
-			case 'laststart':
-			case 'stopped':
-				if (is_null($value))
-				{
-					$sHtml = ''; // Undefined
-				}
-				else
-				{
-					$oDateTime = new DateTime();
-					$oDateTime->setTimestamp($value);
-					$oDateTimeFormat = AttributeDateTime::GetFormat();
-					$sHtml = Str::pure2html($oDateTimeFormat->Format($oDateTime));
-				}
-				break;
-
-			default:
-				foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-				{
-					$sThPrefix = $iThreshold . '_';
-					if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
-					{
-						// The current threshold is concerned
-						$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
-						switch ($sThresholdCode)
-						{
-							case 'deadline':
-								if ($value)
-								{
-									$sDate = date(AttributeDateTime::GetInternalFormat(), $value);
-									$sHtml = Str::pure2html(AttributeDeadline::FormatDeadline($sDate));
-								}
-								else
-								{
-									$sHtml = '';
-								}
-								break;
-							case 'passed':
-							case 'triggered':
-								$sHtml = $this->GetBooleanLabel($value);
-								break;
-							case 'overrun':
-								$sHtml = Str::pure2html(AttributeDuration::FormatDuration($value));
-								break;
-						}
-					}
-				}
-		}
-		return $sHtml;
-	}
-
-	public function GetSubItemAsCSV($sItemCode, $value, $sSeparator = ',', $sTextQualifier = '"', $bConvertToPlainText = false)
-	{
-		$sFrom = array("\r\n", $sTextQualifier);
-		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
-		$sEscaped = str_replace($sFrom, $sTo, (string)$value);
-		$sRet = $sTextQualifier.$sEscaped.$sTextQualifier;
-
-		switch($sItemCode)
-		{
-		case 'timespent':
-				$sRet = $sTextQualifier . AttributeDuration::FormatDuration($value) . $sTextQualifier;
-				break;
-		case 'started':
-		case 'laststart':
-		case 'stopped':
-				if ($value !== null)
-				{
-					$oDateTime = new DateTime();
-					$oDateTime->setTimestamp($value);
-					$oDateTimeFormat = AttributeDateTime::GetFormat();
-					$sRet = $sTextQualifier . $oDateTimeFormat->Format($oDateTime) . $sTextQualifier;
-				}
-				break;
-
-		default:
-			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-			{
-				$sThPrefix = $iThreshold.'_';
-				if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
-				{
-					// The current threshold is concerned
-					$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
-					switch($sThresholdCode)
-					{
-						case 'deadline':
-								if ($value != '')
-								{
-									$oDateTime = new DateTime();
-									$oDateTime->setTimestamp($value);
-									$oDateTimeFormat = AttributeDateTime::GetFormat();
-									$sRet = $sTextQualifier . $oDateTimeFormat->Format($oDateTime) . $sTextQualifier;
-								}
-								break;
-
-							case 'passed':
-							case 'triggered':
-								$sRet = $sTextQualifier . $this->GetBooleanLabel($value) . $sTextQualifier;
-								break;
-
-							case 'overrun':
-								$sRet = $sTextQualifier . AttributeDuration::FormatDuration($value) . $sTextQualifier;
-								break;
-						}
-				}
-			}
-		}
-		return $sRet;
-	}
-
-	public function GetSubItemAsXML($sItemCode, $value)
-	{
-		$sRet = Str::pure2xml((string)$value);
-
-		switch($sItemCode)
-		{
-		case 'timespent':
-		case 'started':
-		case 'laststart':
-		case 'stopped':
-				break;
-
-		default:
-			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-			{
-				$sThPrefix = $iThreshold.'_';
-				if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
-				{
-					// The current threshold is concerned
-					$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
-					switch($sThresholdCode)
-					{
-					case 'deadline':
-						break;
-
-					case 'passed':
-					case 'triggered':
-						$sRet = $this->GetBooleanLabel($value);
-						break;
-
-					case 'overrun':
-						break;
-					}
-				}
-			}
-		}
-		return $sRet;
-	}
-
-	/**
-	 * Implemented for the HTML spreadsheet format!
-	 *
-	 * @param string $sItemCode
-	 * @param \ormStopWatch $value
-	 *
-	 * @return false|string
-	 */
-	public function GetSubItemAsEditValue($sItemCode, $value)
-	{
-		$sRet = $value;
-
-		switch($sItemCode)
-		{
-		case 'timespent':
-			break;
-
-		case 'started':
-		case 'laststart':
-		case 'stopped':
-			if (is_null($value))
-			{
-				$sRet = ''; // Undefined
-			}
-			else
-			{
-				$sRet = date((string)AttributeDateTime::GetFormat(), $value);
-			}
-			break;
-
-		default:
-			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
-			{
-				$sThPrefix = $iThreshold.'_';
-				if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
-				{
-					// The current threshold is concerned
-					$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
-					switch($sThresholdCode)
-					{
-					case 'deadline':
-						if ($value)
-						{
-							$sRet = date((string)AttributeDateTime::GetFormat(), $value);
-						}
-						else
-						{
-							$sRet = '';
-						}
-						break;
-					case 'passed':
-					case 'triggered':
-						$sRet = $this->GetBooleanLabel($value);
-						break;
-					case 'overrun':
-						break;
-					}
-				}
-			}
-		}
-		return $sRet;
-	}
-}
-
-/**
- * View of a subvalue of another attribute
- * If an attribute implements the verbs GetSubItem.... then it can expose
- * internal values, each of them being an attribute and therefore they
- * can be displayed at different times in the object lifecycle, and used for
- * reporting (as a condition in OQL, or as an additional column in an export)  
- * Known usages: Stop Watches can expose threshold statuses
- */
-class AttributeSubItem extends AttributeDefinition
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array('target_attcode', 'item_code'));
-	}
-
-	public function GetParentAttCode() {return $this->Get("target_attcode");} 
-
-	/**
-	 * Helper : get the attribute definition to which the execution will be forwarded	
-	 */	
-	public function GetTargetAttDef()
-	{
-		$sClass = $this->GetHostClass();
-		$oParentAttDef = MetaModel::GetAttributeDef($sClass, $this->Get('target_attcode'));
-		return $oParentAttDef;
-	}
-
-	public function GetEditClass() {return "";}
-	
-	public function GetValuesDef() {return null;}
-
-	static public function IsBasedOnDBColumns() {return true;}
-	static public function IsScalar() {return true;}
-	public function IsWritable() {return false;}
-	public function GetDefaultValue(DBObject $oHostObject = null) {return null;}
-//	public function IsNullAllowed() {return false;}
-
-	static public function LoadInObject() {return false;} // if this verb returns false, then GetValue must be implemented
-
-	/**
-	 * Used by DBOBject::Get()
-	 *
-	 * @param \DBObject $oHostObject
-	 *
-	 * @return \AttributeSubItem
-	 * @throws \CoreException
-	 */
-	public function GetValue($oHostObject)
-	{
-		/** @var \AttributeStopWatch $oParent */
-		$oParent = $this->GetTargetAttDef();
-		$parentValue = $oHostObject->GetStrict($oParent->GetCode());
-		$res = $oParent->GetSubItemValue($this->Get('item_code'), $parentValue, $oHostObject);
-		return $res;
-	}
-
-	// 
-//	protected function ScalarToSQL($value) {return $value;} // format value as a valuable SQL literal (quoted outside)
-
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-	}
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		return array();
-	}
-
-	public function GetFilterDefinitions()
-	{
-		return array($this->GetCode() => new FilterFromAttribute($this));
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array();
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return "=";
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		$sQValue = CMDBSource::Quote($value);
-		switch ($sOpCode)
-		{
-		case '!=':
-			return $this->GetSQLExpr()." != $sQValue";
-			break;
-		case '=':
-		default:
-			return $this->GetSQLExpr()." = $sQValue";
-		}
-	} 
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		$oParent = $this->GetTargetAttDef();
-		$res = $oParent->GetSubItemSQLExpression($this->Get('item_code'));
-		return $res;
-	}
-
-	public function GetAsPlainText($value, $oHostObject = null, $bLocalize = true)
-	{
-		$oParent = $this->GetTargetAttDef();
-		$res = $oParent->GetSubItemAsPlainText($this->Get('item_code'), $value);
-		return $res;
-	}
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		$oParent = $this->GetTargetAttDef();
-		$res = $oParent->GetSubItemAsHTML($this->Get('item_code'), $value);
-		return $res;
-	}
-
-	public function GetAsHTMLForHistory($value, $oHostObject = null, $bLocalize = true)
-	{
-		$oParent = $this->GetTargetAttDef();
-		$res = $oParent->GetSubItemAsHTMLForHistory($this->Get('item_code'), $value);
-		return $res;
-	}
-
-	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		$oParent = $this->GetTargetAttDef();
-		$res = $oParent->GetSubItemAsCSV($this->Get('item_code'), $value, $sSeparator, $sTextQualifier, $bConvertToPlainText);
-		return $res;
-	}
-	
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		$oParent = $this->GetTargetAttDef();
-		$res = $oParent->GetSubItemAsXML($this->Get('item_code'), $value);
-		return $res;
-	}
-
-	/**
-	 * As of now, this function must be implemented to have the value in spreadsheet format
-	 */	 	
-	public function GetEditValue($value, $oHostObj = null)
-	{
-		$oParent = $this->GetTargetAttDef();
-		$res = $oParent->GetSubItemAsEditValue($this->Get('item_code'), $value);
-		return $res;
-	}
-	
-	public function IsPartOfFingerprint()
-	{
-		return false;
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\LabelField';
-	}
-
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-		parent::MakeFormField($oObject, $oFormField);
-
-		// Note : As of today, this attribute is -by nature- only supported in readonly mode, not edition
-		$sAttCode = $this->GetCode();
-		$oFormField->SetCurrentValue(html_entity_decode($oObject->GetAsHTML($sAttCode), ENT_QUOTES, 'UTF-8'));
-		$oFormField->SetReadOnly(true);
-
-		return $oFormField;
-	}
-
-}
-
-/**
- * One way encrypted (hashed) password
- */
-class AttributeOneWayPassword extends AttributeDefinition
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("depends_on"));
-	}
-
-	public function GetEditClass() {return "One Way Password";}
-
-	static public function IsBasedOnDBColumns() {return true;}
-	static public function IsScalar() {return true;}
-	public function IsWritable() {return true;}
-	public function GetDefaultValue(DBObject $oHostObject = null) {return "";}
-	public function IsNullAllowed() {return $this->GetOptional("is_null_allowed", false);}
-
-	// Facilitate things: allow the user to Set the value from a string or from an ormPassword (already encrypted)
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		$oPassword = $proposedValue;
-		if (is_object($oPassword))
-		{
-			$oPassword = clone $proposedValue;
-		}
-		else
-		{
-			$oPassword = new ormPassword('', '');
-			$oPassword->SetPassword($proposedValue);
-		}
-		return $oPassword;
-	}
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		if ($sPrefix == '')
-		{
-			$sPrefix = $this->GetCode(); // Warning: AttributeOneWayPassword does not have any sql property so code = sql !
-		}
-		$aColumns = array();
-		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
-		$aColumns[''] = $sPrefix.'_hash';
-		$aColumns['_salt'] = $sPrefix.'_salt';
-		return $aColumns;
-	}
-
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		if (!array_key_exists($sPrefix, $aCols))
-		{
-			$sAvailable = implode(', ', array_keys($aCols));
-			throw new MissingColumnException("Missing column '$sPrefix' from {$sAvailable}");
-		} 
-		$hashed = isset($aCols[$sPrefix]) ? $aCols[$sPrefix] : '';
-
-		if (!array_key_exists($sPrefix.'_salt', $aCols)) 
-		{
-			$sAvailable = implode(', ', array_keys($aCols));
-			throw new MissingColumnException("Missing column '".$sPrefix."_salt' from {$sAvailable}");
-		} 
-		$sSalt = isset($aCols[$sPrefix.'_salt']) ? $aCols[$sPrefix.'_salt'] : '';
-
-		$value = new ormPassword($hashed, $sSalt);
-		return $value;
-	}
-
-	public function GetSQLValues($value)
-	{
-		// #@# Optimization: do not load blobs anytime
-		//	 As per mySQL doc, selecting blob columns will prevent mySQL from
-		//	 using memory in case a temporary table has to be created
-		//	 (temporary tables created on disk)
-		//	 We will have to remove the blobs from the list of attributes when doing the select
-		//	 then the use of Get() should finalize the load
-		if ($value instanceOf ormPassword)
-		{
-			$aValues = array();
-			$aValues[$this->GetCode().'_hash'] = $value->GetHash();
-			$aValues[$this->GetCode().'_salt'] = $value->GetSalt();
-		}
-		else
-		{
-			$aValues = array();
-			$aValues[$this->GetCode().'_hash'] = '';
-			$aValues[$this->GetCode().'_salt'] = '';
-		}
-		return $aValues;
-	}
-
-	public function GetSQLColumns($bFullSpec = false)
-	{
-		$aColumns = array();
-		$aColumns[$this->GetCode().'_hash'] = 'TINYBLOB';
-		$aColumns[$this->GetCode().'_salt'] = 'TINYBLOB';
-		return $aColumns;
-	}
-
-	public function GetImportColumns()
-	{
-		$aColumns = array();
-		$aColumns[$this->GetCode()] = 'TINYTEXT'.CMDBSource::GetSqlStringColumnDefinition();
-		return $aColumns;
-	}
-
-	public function FromImportToValue($aCols, $sPrefix = '')
-	{
-		if (!isset($aCols[$sPrefix]))
-		{
-			$sAvailable = implode(', ', array_keys($aCols));
-			throw new MissingColumnException("Missing column '$sPrefix' from {$sAvailable}");
-		} 
-		$sClearPwd = $aCols[$sPrefix];
-
-		$oPassword = new ormPassword('', '');
-		$oPassword->SetPassword($sClearPwd);
-		return $oPassword;
-	}
-
-	public function GetFilterDefinitions()
-	{
-		return array();
-		// still not working... see later...
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array();
-	}
-	public function GetBasicFilterLooseOperator()
-	{
-		return '=';
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		return 'true';
-	} 
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (is_object($value))
-		{
-			return $value->GetAsHTML();
-		}
-		return '';
-	}
-
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		return ''; // Not exportable in CSV
-	}
-	
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		return ''; // Not exportable in XML
-	}
-	
-	public function GetValueLabel($sValue, $oHostObj = null)
-	{
-		// Don't display anything in "group by" reports
-		return '*****';
-	}
-	
-}
-
-// Indexed array having two dimensions
-class AttributeTable extends AttributeDBField
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	public function GetEditClass() {return "Table";}
-
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return "LONGTEXT".CMDBSource::GetSqlStringColumnDefinition();
-	}
-
-	public function GetMaxSize()
-	{
-		return null;
-	}
-
-	public function GetNullValue()
-	{
-		return array();
-	} 
-
-	public function IsNull($proposedValue)
-	{
-		return (count($proposedValue) == 0);
-	} 
-
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		return '';
-	}
-
-	// Facilitate things: allow the user to Set the value from a string
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue))
-		{
-			return array();
-		}
-		else if (!is_array($proposedValue))
-		{
-			return array(0 => array(0 => $proposedValue));
-		}
-		return $proposedValue;
-	}
-
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
-		try
-		{
-			$value = @unserialize($aCols[$sPrefix.'']);
-			if ($value === false)
-			{
-				$value = $this->MakeRealValue($aCols[$sPrefix.''], null);
-			}
-		}
-		catch(Exception $e)
-		{
-			$value = $this->MakeRealValue($aCols[$sPrefix.''], null);
-		}
-
-		return $value;
-	}
-
-	public function GetSQLValues($value)
-	{
-		$aValues = array();
-		$aValues[$this->Get("sql")] = serialize($value);
-		return $aValues;
-	}
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (!is_array($value))
-		{
-			throw new CoreException('Expecting an array', array('found' => get_class($value)));
-		}
-		if (count($value) == 0)
-		{
-			return "";
-		}
-
-		$sRes = "<TABLE class=\"listResults\">";
-		$sRes .= "<TBODY>";
-		foreach($value as $iRow => $aRawData)
-		{
-			$sRes .= "<TR>";
-			foreach ($aRawData as $iCol => $cell)
-			{
-				// Note: avoid the warning in case the cell is made of an array
-				$sCell = @Str::pure2html((string)$cell);
-				$sCell = str_replace("\n", "<br>\n", $sCell);
-				$sRes .= "<TD>$sCell</TD>";
-			}
-			$sRes .= "</TR>";
-		}
-		$sRes .= "</TBODY>";
-		$sRes .= "</TABLE>";
-		return $sRes;
-	}
-
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		// Not implemented
-		return '';
-	}
-
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (!is_array($value) || count($value) == 0)
-		{
-			return "";
-		}
-
-		$sRes = "";
-		foreach($value as $iRow => $aRawData)
-		{
-			$sRes .= "<row>";
-			foreach ($aRawData as $iCol => $cell)
-			{
-				$sCell = Str::pure2xml((string)$cell);
-				$sRes .= "<cell icol=\"$iCol\">$sCell</cell>";
-			}
-			$sRes .= "</row>";
-		}
-		return $sRes;
-	}
-}
-
-// The PHP value is a hash array, it is stored as a TEXT column
-class AttributePropertySet extends AttributeTable
-{
-	public function GetEditClass() {return "PropertySet";}
-
-	// Facilitate things: allow the user to Set the value from a string
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (!is_array($proposedValue))
-		{
-			return array('?' => (string)$proposedValue);
-		}
-		return $proposedValue;
-	}
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (!is_array($value))
-		{
-			throw new CoreException('Expecting an array', array('found' => get_class($value)));
-		}
-		if (count($value) == 0)
-		{
-			return "";
-		}
-
-		$sRes = "<TABLE class=\"listResults\">";
-		$sRes .= "<TBODY>";
-		foreach($value as $sProperty => $sValue)
-		{
-			if ($sProperty == 'auth_pwd')
-			{
-				$sValue = '*****';
-			}
-			$sRes .= "<TR>";
-			$sCell = str_replace("\n", "<br>\n", Str::pure2html((string)$sValue));
-			$sRes .= "<TD class=\"label\">$sProperty</TD><TD>$sCell</TD>";
-			$sRes .= "</TR>";
-		}
-		$sRes .= "</TBODY>";
-		$sRes .= "</TABLE>";
-		return $sRes;
-	}
-
-	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		if (!is_array($value) || count($value) == 0)
-		{
-			return "";
-		}
-
-		$aRes = array();
-		foreach($value as $sProperty => $sValue)
-		{
-			if ($sProperty == 'auth_pwd')
-			{
-				$sValue = '*****';
-			}
-			$sFrom = array(',', '=');
-			$sTo = array('\,', '\=');
-			$aRes[] = $sProperty.'='.str_replace($sFrom, $sTo, (string)$sValue);
-		}
-		$sRaw = implode(',', $aRes);
-
-		$sFrom = array("\r\n", $sTextQualifier);
-		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
-		$sEscaped = str_replace($sFrom, $sTo, $sRaw);
-		return $sTextQualifier.$sEscaped.$sTextQualifier;
-	}
-
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		if (!is_array($value) || count($value) == 0)
-		{
-			return "";
-		}
-
-		$sRes = "";
-		foreach($value as $sProperty => $sValue)
-		{
-			if ($sProperty == 'auth_pwd')
-			{
-				$sValue = '*****';
-			}
-			$sRes .= "<property id=\"$sProperty\">";
-			$sRes .= Str::pure2xml((string)$sValue);
-			$sRes .= "</property>";
-		}
-		return $sRes;
-	}
-}
-
-/**
- * The attribute dedicated to the friendly name automatic attribute (not written) 
- *
- * @package	 iTopORM
- */
-
-/**
- * The attribute dedicated to the friendly name automatic attribute (not written) 
- *
- * @package	 iTopORM
- */
-class AttributeFriendlyName extends AttributeDefinition
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
-	public $m_sValue;
-
-	public function __construct($sCode)
-	{
-		$this->m_sCode = $sCode;
-		$aParams = array();
-		$aParams["default_value"] = '';
-		parent::__construct($sCode, $aParams);
-
-		$this->m_sValue = $this->Get("default_value");
-	}
-
-
-	public function GetEditClass() {return "";}
-
-	public function GetValuesDef() {return null;}
-	public function GetPrerequisiteAttributes($sClass = null) {return $this->GetOptional("depends_on", array());}
-
-	static public function IsScalar() {return true;}
-	public function IsNullAllowed() {return false;}
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		if ($sPrefix == '')
-		{
-			$sPrefix = $this->GetCode(); // Warning AttributeComputedFieldVoid does not have any sql property
-		}
-		return array('' => $sPrefix);
-	}
-
-	static public function IsBasedOnOQLExpression() {return true;}
-	public function GetOQLExpression()
-	{
-		return MetaModel::GetNameExpression($this->GetHostClass());
-	}
-
-	public function GetLabel($sDefault = null)
-	{
-		$sLabel = parent::GetLabel('');
-		if (strlen($sLabel) == 0)
-		{
-			$sLabel = Dict::S('Core:FriendlyName-Label');
-		}
-		return $sLabel;
-	}
-	public function GetDescription($sDefault = null)
-	{
-		$sLabel = parent::GetDescription('');
-		if (strlen($sLabel) == 0)
-		{
-			$sLabel = Dict::S('Core:FriendlyName-Description');
-		}
-		return $sLabel;
-	} 
-
-	public function FromSQLToValue($aCols, $sPrefix = '')
-	{
- 		$sValue = $aCols[$sPrefix];
-		return $sValue;
-	}
-
-	public function IsWritable()
-	{
-		return false;
-	}
-	public function IsMagic()
-	{
-		return true;
-	}
-
-	static public function IsBasedOnDBColumns()
-	{
-		return false;
-	}
-
-	public function SetFixedValue($sValue)
-	{
-		$this->m_sValue = $sValue;
-	}
-	public function GetDefaultValue(DBObject $oHostObject = null)
-	{
-		return $this->m_sValue;
-	}
-
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		return Str::pure2html((string)$sValue);
-	}
-
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		$sFrom = array("\r\n", $sTextQualifier);
-		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
-		$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
-		return $sTextQualifier.$sEscaped.$sTextQualifier;
-	}
-
-	static function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\StringField';
-	}
-
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-		}
-		$oFormField->SetReadOnly(true);
-		parent::MakeFormField($oObject, $oFormField);
-
-		return $oFormField;
-	}
-
-	// Do not display friendly names in the history of change
-	public function DescribeChangeAsHTML($sOldValue, $sNewValue, $sLabel = null)
-	{
-		return '';
-	}
-
-	public function GetFilterDefinitions()
-	{
-		return array($this->GetCode() => new FilterFromAttribute($this));
-	}
-
-	public function GetBasicFilterOperators()
-	{
-		return array("="=>"equals", "!="=>"differs from");
-	}
-
-	public function GetBasicFilterLooseOperator()
-	{
-		return "Contains";
-	}
-
-	public function GetBasicFilterSQLExpr($sOpCode, $value)
-	{
-		$sQValue = CMDBSource::Quote($value);
-		switch ($sOpCode)
-		{
-		case '=':
-		case '!=':
-			return $this->GetSQLExpr()." $sOpCode $sQValue";
-		case 'Contains':
-			return $this->GetSQLExpr()." LIKE ".CMDBSource::Quote("%$value%");
-		case 'NotLike':
-			return $this->GetSQLExpr()." NOT LIKE $sQValue";
-		case 'Like':
-		default:
-			return $this->GetSQLExpr()." LIKE $sQValue";
-		}
-	}
-	
-	public function IsPartOfFingerprint() { return false; }
-}
-
-/**
- * Holds the setting for the redundancy on a specific relation
- * Its value is a string, containing either:
- * - 'disabled'
- * - 'n', where n is a positive integer value giving the minimum count of items upstream
- * - 'n%', where n is a positive integer value, giving the minimum as a percentage of the total count of items upstream
- *
- * @package	 iTopORM
- */
-class AttributeRedundancySettings extends AttributeDBField
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static public function ListExpectedParams()
-	{
-		return array('sql', 'relation_code', 'from_class', 'neighbour_id', 'enabled', 'enabled_mode', 'min_up', 'min_up_type', 'min_up_mode');
-	}
-
-	public function GetValuesDef() {return null;} 
-	public function GetPrerequisiteAttributes($sClass = null) {return array();}
-
-	public function GetEditClass() {return "RedundancySetting";}
-	protected function GetSQLCol($bFullSpec = false)
-	{
-		return "VARCHAR(20)"
-			.CMDBSource::GetSqlStringColumnDefinition()
-			.($bFullSpec ? $this->GetSQLColSpec() : '');
-	}
-
-
-	public function GetValidationPattern()
-	{
-		return "^[0-9]{1,3}|[0-9]{1,2}%|disabled$";
-	}
-
-	public function GetMaxSize()
-	{
-		return 20;
-	}
-
-	public function GetDefaultValue(DBObject $oHostObject = null)
-	{
-		$sRet = 'disabled';
-		if ($this->Get('enabled'))
-		{
-			if ($this->Get('min_up_type') == 'count')
-			{
-				$sRet = (string) $this->Get('min_up');
-			}
-			else // percent
-			{
-				$sRet = $this->Get('min_up').'%';
-			}
-		}
-		return $sRet;
-	}
-
-	public function IsNullAllowed()
-	{
-		return false;
-	} 
-
-	public function GetNullValue()
-	{
-		return '';
-	} 
-
-	public function IsNull($proposedValue)
-	{
-		return ($proposedValue == '');
-	} 
-
-	public function MakeRealValue($proposedValue, $oHostObj)
-	{
-		if (is_null($proposedValue)) return '';
-		return (string)$proposedValue;
-	}
-
-	public function ScalarToSQL($value)
-	{
-		if (!is_string($value))
-		{
-			throw new CoreException('Expected the attribute value to be a string', array('found_type' => gettype($value), 'value' => $value, 'class' => $this->GetHostClass(), 'attribute' => $this->GetCode()));
-		}
-		return $value;
-	}
-
-	public function GetRelationQueryData()
-	{
-		foreach (MetaModel::EnumRelationQueries($this->GetHostClass(), $this->Get('relation_code'), false) as $sDummy => $aQueryInfo)
-		{
-			if ($aQueryInfo['sFromClass'] == $this->Get('from_class'))
-			{
-				if ($aQueryInfo['sNeighbour'] == $this->Get('neighbour_id'))
-				{
-					return $aQueryInfo;
-				}
-			}
-		}
-		return array();
-	}
-
-	/**
-	 * Find the user option label
-	 *
-	 * @param string $sUserOption possible values : disabled|cout|percent
-	 * @param string $sDefault
-	 *
-	 * @return string
-	 * @throws \Exception
-	 */
-	public function GetUserOptionFormat($sUserOption, $sDefault = null)
-	{
-		$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/'.$sUserOption, null, true /*user lang*/);
-		if (is_null($sLabel))
-		{
-			// If no default value is specified, let's define the most relevant one for developping purposes
-			if (is_null($sDefault))
-			{
-				$sDefault = str_replace('_', ' ', $this->m_sCode.':'.$sUserOption.'(%1$s)');
-			}
-			// Browse the hierarchy again, accepting default (english) translations
-			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/'.$sUserOption, $sDefault, false);
-		}
-		return $sLabel;
-	}
-
-	/**
-	 * Override to display the value in the GUI
-	 *
-	 * @param string $sValue
-	 * @param \DBObject $oHostObject
-	 * @param bool $bLocalize
-	 *
-	 * @return string
-	 * @throws \CoreException
-	 * @throws \DictExceptionMissingString
-	 */
-	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
-	{
-		$sCurrentOption = $this->GetCurrentOption($sValue);
-		$sClass = $oHostObject ? get_class($oHostObject) : $this->m_sHostClass;
-		return sprintf($this->GetUserOptionFormat($sCurrentOption), $this->GetMinUpValue($sValue), MetaModel::GetName($sClass));
-	}
-
-	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		$sFrom = array("\r\n", $sTextQualifier);
-		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
-		$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
-		return $sTextQualifier.$sEscaped.$sTextQualifier;
-	}
-
-	/**
-	 * Helper to interpret the value, given the current settings and string representation of the attribute	
-	 */	
-	public function IsEnabled($sValue)
-	{
-		if ($this->get('enabled_mode') == 'fixed')
-		{
-			$bRet = $this->get('enabled');
-		}
-		else
-		{
-			$bRet = ($sValue != 'disabled');
-		}
-		return $bRet;
-	}
-
-	/**
-	 * Helper to interpret the value, given the current settings and string representation of the attribute	
-	 */	
-	public function GetMinUpType($sValue)
-	{
-		if ($this->get('min_up_mode') == 'fixed')
-		{
-			$sRet = $this->get('min_up_type');
-		}
-		else
-		{
-			$sRet = 'count';
-			if (substr(trim($sValue), -1, 1) == '%')
-			{
-				$sRet = 'percent';
-			}
-		}
-		return $sRet;
-	}
-
-	/**
-	 * Helper to interpret the value, given the current settings and string representation of the attribute	
-	 */	
-	public function GetMinUpValue($sValue)
-	{
-		if ($this->get('min_up_mode') == 'fixed')
-		{
-			$iRet = (int) $this->Get('min_up');
-		}
-		else
-		{
-			$sRefValue = $sValue;
-			if (substr(trim($sValue), -1, 1) == '%')
-			{
-				$sRefValue = substr(trim($sValue), 0, -1);
-			}
-			$iRet = (int) trim($sRefValue);
-		}
-		return $iRet;
-	}
-
-	/**
-	 * Helper to determine if the redundancy can be viewed/edited by the end-user
-	 */	
-	public function IsVisible()
-	{
-		$bRet = false;
-		if ($this->Get('enabled_mode') == 'fixed')
-		{
-			$bRet = $this->Get('enabled');
-		}
-		elseif ($this->Get('enabled_mode') == 'user')
-		{
-			$bRet = true;
-		}
-		return $bRet;
-	}
-
-	public function IsWritable()
-	{
-		if (($this->Get('enabled_mode') == 'fixed') && ($this->Get('min_up_mode') == 'fixed'))
-		{
-			return false;
-		}
-		return true;
-	}
-
-	/**
-	 * Returns an HTML form that can be read by ReadValueFromPostedForm
-	 */	
-	public function GetDisplayForm($sCurrentValue, $oPage, $bEditMode = false, $sFormPrefix = '')
-	{
-		$sRet = '';
-		$aUserOptions = $this->GetUserOptions($sCurrentValue);
-		if (count($aUserOptions) < 2)
-		{
-			$bEditOption = false;
-		}
-		else
-		{
-			$bEditOption = $bEditMode;
-		}
-		$sCurrentOption = $this->GetCurrentOption($sCurrentValue);
-		foreach($aUserOptions as $sUserOption)
-		{
-			$bSelected = ($sUserOption == $sCurrentOption);
-			$sRet .= '<div>';
-			$sRet .= $this->GetDisplayOption($sCurrentValue, $oPage, $sFormPrefix, $bEditOption, $sUserOption, $bSelected);
-			$sRet .= '</div>';
-		}
-		return $sRet;
-	}
-
-	const USER_OPTION_DISABLED = 'disabled';
-	const USER_OPTION_ENABLED_COUNT = 'count';
-	const USER_OPTION_ENABLED_PERCENT = 'percent';
-
-	/**
-	 * Depending on the xxx_mode parameters, build the list of options that are allowed to the end-user
-	 */	 	
-	protected function GetUserOptions($sValue)
-	{
-		$aRet = array();
-		if ($this->Get('enabled_mode') == 'user')
-		{
-			$aRet[] = self::USER_OPTION_DISABLED;
-		}
-		
-		if ($this->Get('min_up_mode') == 'user')
-		{
-			$aRet[] = self::USER_OPTION_ENABLED_COUNT;
-			$aRet[] = self::USER_OPTION_ENABLED_PERCENT;
-		}
-		else
-		{
-			if ($this->GetMinUpType($sValue) == 'count')
-			{
-				$aRet[] = self::USER_OPTION_ENABLED_COUNT;
-			}
-			else
-			{
-				$aRet[] = self::USER_OPTION_ENABLED_PERCENT;
-			}
-		}
-		return $aRet;
-	}
-
-	/**
-	 * Convert the string representation into one of the existing options	
-	 */	
-	protected function GetCurrentOption($sValue)
-	{
-		$sRet = self::USER_OPTION_DISABLED;
-		if ($this->IsEnabled($sValue))
-		{
-			if ($this->GetMinUpType($sValue) == 'count')
-			{
-				$sRet = self::USER_OPTION_ENABLED_COUNT;
-			}
-			else
-			{
-				$sRet = self::USER_OPTION_ENABLED_PERCENT;
-			}
-		}
-		return $sRet;
-	}
-
-	/**
-	 * Display an option (form, or current value)
-	 *
-	 * @param string $sCurrentValue
-	 * @param \WebPage $oPage
-	 * @param string $sFormPrefix
-	 * @param bool $bEditMode
-	 * @param string $sUserOption
-	 * @param bool $bSelected
-	 *
-	 * @return string
-	 * @throws \CoreException
-	 * @throws \DictExceptionMissingString
-	 * @throws \Exception
-	 */
-	protected function GetDisplayOption($sCurrentValue, $oPage, $sFormPrefix, $bEditMode, $sUserOption, $bSelected = true)
-	{
-		$sRet = '';
-
-		$iCurrentValue = $this->GetMinUpValue($sCurrentValue);
-		if ($bEditMode)
-		{
-			$sValue = null;
-			$sHtmlNamesPrefix = 'rddcy_'.$this->Get('relation_code').'_'.$this->Get('from_class').'_'.$this->Get('neighbour_id');
-			switch ($sUserOption)
-			{
-			case self::USER_OPTION_DISABLED:
-				$sValue = ''; // Empty placeholder
-				break;
-	
-			case self::USER_OPTION_ENABLED_COUNT:
-				if ($bEditMode)
-				{
-					$sName = $sHtmlNamesPrefix.'_min_up_count';
-					$sEditValue = $bSelected ? $iCurrentValue : '';
-					$sValue = '<input class="redundancy-min-up-count" type="string" size="3" name="'.$sName.'" value="'.$sEditValue.'">';
-					// To fix an issue on Firefox: focus set to the option (because the input is within the label for the option)
-					$oPage->add_ready_script("\$('[name=\"$sName\"]').click(function(){var me=this; setTimeout(function(){\$(me).focus();}, 100);});");
-				}
-				else
-				{
-					$sValue = $iCurrentValue;
-				}
-				break;
-	
-			case self::USER_OPTION_ENABLED_PERCENT:
-				if ($bEditMode)
-				{
-					$sName = $sHtmlNamesPrefix.'_min_up_percent';
-					$sEditValue = $bSelected ? $iCurrentValue : '';
-					$sValue = '<input class="redundancy-min-up-percent" type="string" size="3" name="'.$sName.'" value="'.$sEditValue.'">';
-					// To fix an issue on Firefox: focus set to the option (because the input is within the label for the option)
-					$oPage->add_ready_script("\$('[name=\"$sName\"]').click(function(){var me=this; setTimeout(function(){\$(me).focus();}, 100);});");
-				}
-				else
-				{
-					$sValue = $iCurrentValue;
-				}
-				break;
-			}
-			$sLabel = sprintf($this->GetUserOptionFormat($sUserOption), $sValue, MetaModel::GetName($this->GetHostClass()));
-
-			$sOptionName = $sHtmlNamesPrefix.'_user_option';
-			$sOptionId = $sOptionName.'_'.$sUserOption;
-			$sChecked = $bSelected ? 'checked' : '';
-			$sRet = '<input type="radio" name="'.$sOptionName.'" id="'.$sOptionId.'" value="'.$sUserOption.'" '.$sChecked.'> <label for="'.$sOptionId.'">'.$sLabel.'</label>';
-		}
-		else
-		{
-			// Read-only: display only the currently selected option
-			if ($bSelected)
-			{
-				$sRet = sprintf($this->GetUserOptionFormat($sUserOption), $iCurrentValue, MetaModel::GetName($this->GetHostClass()));
-			}
-		}
-		return $sRet;
-	}
-
-	/**
-	 * Makes the string representation out of the values given by the form defined in GetDisplayForm	
-	 */	
-	public function ReadValueFromPostedForm($sFormPrefix)
-	{
-		$sHtmlNamesPrefix = 'rddcy_'.$this->Get('relation_code').'_'.$this->Get('from_class').'_'.$this->Get('neighbour_id');
-
-		$iMinUpCount = (int) utils::ReadPostedParam($sHtmlNamesPrefix.'_min_up_count', null, 'raw_data');
-		$iMinUpPercent = (int) utils::ReadPostedParam($sHtmlNamesPrefix.'_min_up_percent', null, 'raw_data');
-		$sSelectedOption = utils::ReadPostedParam($sHtmlNamesPrefix.'_user_option', null, 'raw_data');
-		switch ($sSelectedOption)
-		{
-		case self::USER_OPTION_ENABLED_COUNT:
-			$sRet = $iMinUpCount;
-			break;
-
-		case self::USER_OPTION_ENABLED_PERCENT:
-			$sRet = $iMinUpPercent.'%';
-			break;
-
-		case self::USER_OPTION_DISABLED:
-		default:
-			$sRet = 'disabled';
-			break;
-		}
-		return $sRet;
-	}
-}
-
-/**
- * Custom fields managed by an external implementation
- *
- * @package     iTopORM
- */
-class AttributeCustomFields extends AttributeDefinition
-{
-	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
-
-	static public function ListExpectedParams()
-	{
-		return array_merge(parent::ListExpectedParams(), array("handler_class"));
-	}
-
-	public function GetEditClass() {return "CustomFields";}
-	public function IsWritable() {return true;}
-	static public function LoadFromDB() {return false;} // See ReadValue...
-
-	public function GetDefaultValue(DBObject $oHostObject = null)
-	{
-		return new ormCustomFieldsValue($oHostObject, $this->GetCode());
-	}
-
-	public function GetBasicFilterOperators() {return array();}
-	public function GetBasicFilterLooseOperator() {return '';}
-	public function GetBasicFilterSQLExpr($sOpCode, $value) {return '';}
-
-	/**
-	 * @param DBObject $oHostObject
-	 * @param array|null $aValues
-	 * @return CustomFieldsHandler
-	 */
-	public function GetHandler($aValues = null)
-	{
-		$sHandlerClass = $this->Get('handler_class');
-		$oHandler = new $sHandlerClass($this->GetCode());
-		if (!is_null($aValues))
-		{
-			$oHandler->SetCurrentValues($aValues);
-		}
-		return $oHandler;
-	}
-
-	public function GetPrerequisiteAttributes($sClass = null)
-	{
-		$sHandlerClass = $this->Get('handler_class');
-		return $sHandlerClass::GetPrerequisiteAttributes($sClass);
-	}
-
-	public function GetEditValue($sValue, $oHostObj = null)
-	{
-		return $this->GetForTemplate($sValue, '', $oHostObj, true);
-	}
-
-	/**
-	 * Makes the string representation out of the values given by the form defined in GetDisplayForm
-	 */
-	public function ReadValueFromPostedForm($oHostObject, $sFormPrefix)
-	{
-		$aRawData = json_decode(utils::ReadPostedParam("attr_{$sFormPrefix}{$this->GetCode()}", '{}', 'raw_data'), true);
-		return new ormCustomFieldsValue($oHostObject, $this->GetCode(), $aRawData);
-	}
-
-	public function MakeRealValue($proposedValue, $oHostObject)
-	{
-		if (is_object($proposedValue) && ($proposedValue instanceof ormCustomFieldsValue))
-		{
-			return $proposedValue;
-		}
-		elseif (is_string($proposedValue))
-		{
-			$aValues = json_decode($proposedValue, true);
-			return new ormCustomFieldsValue($oHostObject, $this->GetCode(), $aValues);
-		}
-		elseif (is_array($proposedValue))
-		{
-			return new ormCustomFieldsValue($oHostObject, $this->GetCode(), $proposedValue);
-		}
-		elseif (is_null($proposedValue))
-		{
-			return new ormCustomFieldsValue($oHostObject, $this->GetCode());
-		}
-		throw new Exception('Unexpected type for the value of a custom fields attribute: '.gettype($proposedValue));
-	}
-
-	static public function GetFormFieldClass()
-	{
-		return '\\Combodo\\iTop\\Form\\Field\\SubFormField';
-	}
-
-	/**
-	 * Override to build the relevant form field
-	 *
-	 * When called first, $oFormField is null and will be created (eg. Make). Then when the ::parent is called and the $oFormField is passed, MakeFormField behaves more like a Prepare.
-	 */
-	public function MakeFormField(DBObject $oObject, $oFormField = null)
-	{
-		if ($oFormField === null)
-		{
-			$sFormFieldClass = static::GetFormFieldClass();
-			$oFormField = new $sFormFieldClass($this->GetCode());
-			$oFormField->SetForm($this->GetForm($oObject));
-		}
-		parent::MakeFormField($oObject, $oFormField);
-		
-		return $oFormField;
-	}
-
-	/**
-	 * @param DBObject $oHostObject
-	 * @param null $sFormPrefix
-	 * @return Combodo\iTop\Form\Form
-	 * @throws \Exception
-	 */
-	public function GetForm(DBObject $oHostObject, $sFormPrefix = null)
-	{
-		try
-		{
-			$oValue = $oHostObject->Get($this->GetCode());
-			$oHandler = $this->GetHandler($oValue->GetValues());
-			$sFormId = is_null($sFormPrefix) ? 'cf_'.$this->GetCode() : $sFormPrefix.'_cf_'.$this->GetCode();
-			$oHandler->BuildForm($oHostObject, $sFormId);
-			$oForm = $oHandler->GetForm();
-		}
-		catch (Exception $e)
-		{
-			$oForm = new \Combodo\iTop\Form\Form('');
-			$oField = new \Combodo\iTop\Form\Field\LabelField('');
-			$oField->SetLabel('Custom field error: '.$e->getMessage());
-			$oForm->AddField($oField);
-			$oForm->Finalize();
-		}
-		return $oForm;
-	}
-
-	/**
-	 * Read the data from where it has been stored. This verb must be implemented as soon as LoadFromDB returns false and LoadInObject returns true
-	 * @param $oHostObject
-	 * @return ormCustomFieldsValue
-	 */
-	public function ReadValue($oHostObject)
-	{
-		try
-		{
-			$oHandler = $this->GetHandler();
-			$aValues = $oHandler->ReadValues($oHostObject);
-			$oRet = new ormCustomFieldsValue($oHostObject, $this->GetCode(), $aValues);
-		}
-		catch (Exception $e)
-		{
-			$oRet = new ormCustomFieldsValue($oHostObject, $this->GetCode());
-		}
-		return $oRet;
-	}
-
-	/**
-	 * Record the data (currently in the processing of recording the host object)
-	 * It is assumed that the data has been checked prior to calling Write()
-	 * @param DBObject $oHostObject
-	 * @param ormCustomFieldsValue|null $oValue (null is the default value)
-	 */
-	public function WriteValue(DBObject $oHostObject, ormCustomFieldsValue $oValue = null)
-	{
-		if (is_null($oValue))
-		{
-			$oHandler = $this->GetHandler();
-			$aValues = array();
-		}
-		else
-		{
-			// Pass the values through the form to make sure that they are correct
-			$oHandler = $this->GetHandler($oValue->GetValues());
-			$oHandler->BuildForm($oHostObject, '');
-			$oForm = $oHandler->GetForm();
-			$aValues = $oForm->GetCurrentValues();
-		}
-		return $oHandler->WriteValues($oHostObject, $aValues);
-	}
-
-	/**
-	 * The part of the current attribute in the object's signature, for the supplied value
-	 * @param ormCustomFieldsValue $value The value of this attribute for the object
-	 * @return string The "signature" for this field/attribute
-	 */
-	public function Fingerprint($value)
-	{
-		$oHandler = $this->GetHandler($value->GetValues());
-		return $oHandler->GetValueFingerprint();
-	}
-
-	/**
-	 * Check the validity of the data
-	 * @param DBObject $oHostObject
-	 * @param $value
-	 * @return bool|string true or error message
-	 */
-	public function CheckValue(DBObject $oHostObject, $value)
-	{
-		try
-		{
-			$oHandler = $this->GetHandler($value->GetValues());
-			$oHandler->BuildForm($oHostObject, '');
-			$oForm = $oHandler->GetForm();
-			$oForm->Validate();
-			if ($oForm->GetValid())
-			{
-				$ret = true;
-			}
-			else
-			{
-				$aMessages = array();
-				foreach ($oForm->GetErrorMessages() as $sFieldId => $aFieldMessages)
-				{
-					$aMessages[] = $sFieldId.': '.implode(', ', $aFieldMessages);
-				}
-				$ret = 'Invalid value: '.implode(', ', $aMessages);
-			}
-		}
-		catch (Exception $e)
-		{
-			$ret = $e->getMessage();
-		}
-		return $ret;
-	}
-
-	/**
-	 * Cleanup data upon object deletion (object id still available here)
-	 * @param DBObject $oHostObject
-	 * @return
-	 * @throws \CoreException
-	 */
-	public function DeleteValue(DBObject $oHostObject)
-	{
-		$oValue = $oHostObject->Get($this->GetCode());
-		$oHandler = $this->GetHandler($oValue->GetValues());
-		return $oHandler->DeleteValues($oHostObject);
-	}
-
-	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
-	{
-		try
-		{
-			$sRet = $value->GetAsHTML($bLocalize);
-		}
-		catch (Exception $e)
-		{
-			$sRet = 'Custom field error: '.htmlentities($e->getMessage(), ENT_QUOTES, 'UTF-8');
-		}
-		return $sRet;
-	}
-
-	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
-	{
-		try
-		{
-			$sRet = $value->GetAsXML($bLocalize);
-		}
-		catch (Exception $e)
-		{
-			$sRet = Str::pure2xml('Custom field error: '.$e->getMessage());
-		}
-		return $sRet;
-	}
-
-	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
-	{
-		try
-		{
-			$sRet = $value->GetAsCSV($sSeparator, $sTextQualifier, $bLocalize, $bConvertToPlainText);
-		}
-		catch (Exception $e)
-		{
-			$sFrom = array("\r\n", $sTextQualifier);
-			$sTo = array("\n", $sTextQualifier.$sTextQualifier);
-			$sEscaped = str_replace($sFrom, $sTo, 'Custom field error: '.$e->getMessage());
-			$sRet = $sTextQualifier.$sEscaped.$sTextQualifier;
-		}
-		return $sRet;
-	}
-
-	/**
-	 * List the available verbs for 'GetForTemplate'
-	 */
-	public function EnumTemplateVerbs()
-	{
-		$sHandlerClass = $this->Get('handler_class');
-		return $sHandlerClass::EnumTemplateVerbs();
-	}
-
-	/**
-	 * Get various representations of the value, for insertion into a template (e.g. in Notifications)
-	 *
-	 * @param $value mixed The current value of the field
-	 * @param $sVerb string The verb specifying the representation of the value
-	 * @param $oHostObject DBObject The object
-	 * @param $bLocalize bool Whether or not to localize the value
-	 *
-	 * @return string
-	 */
-	public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
-	{
-		try
-		{
-			$sRet = $value->GetForTemplate($sVerb, $bLocalize);
-		}
-		catch (Exception $e)
-		{
-			$sRet = 'Custom field error: '.$e->getMessage();
-		}
-		return $sRet;
-	}
-
-	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
-	{
-		return null;
-	}
-
-	/**
-	 * Helper to get a value that will be JSON encoded
-	 * The operation is the opposite to FromJSONToValue
-	 *
-	 * @param $value
-	 *
-	 * @return string
-	 */
-	public function GetForJSON($value)
-	{
-		return null;
-	}
-
-	/**
-	 * Helper to form a value, given JSON decoded data
-	 * The operation is the opposite to GetForJSON
-	 *
-	 * @param string $json
-	 *
-	 * @return array
-	 */
-	public function FromJSONToValue($json)
-	{
-		return null;
-	}
-
-	public function Equals($val1, $val2)
-	{
-		try
-		{
-			$bEquals = $val1->Equals($val2);
-		}
-		catch (Exception $e)
-		{
-			$bEquals = false;
-		}
-		return $bEquals;
-	}
-}
-
-class AttributeArchiveFlag extends AttributeBoolean
-{
-	public function __construct($sCode)
-	{
-		parent::__construct($sCode, array("allowed_values" => null, "sql" => $sCode, "default_value" => false, "is_null_allowed" => false, "depends_on" => array()));
-	}
-	public function RequiresIndex()
-	{
-		return true;
-	}
-	public function CopyOnAllTables()
-	{
-		return true;
-	}
-	public function IsWritable()
-	{
-		return false;
-	}
-	public function IsMagic()
-	{
-		return true;
-	}
-	public function GetLabel($sDefault = null)
-	{
-		$sDefault = Dict::S('Core:AttributeArchiveFlag/Label', $sDefault);
-		return parent::GetLabel($sDefault);
-	}
-	public function GetDescription($sDefault = null)
-	{
-		$sDefault = Dict::S('Core:AttributeArchiveFlag/Label+', $sDefault);
-		return parent::GetDescription($sDefault);
-	}
-}
-class AttributeArchiveDate extends AttributeDate
-{
-	public function GetLabel($sDefault = null)
-	{
-		$sDefault = Dict::S('Core:AttributeArchiveDate/Label', $sDefault);
-		return parent::GetLabel($sDefault);
-	}
-	public function GetDescription($sDefault = null)
-	{
-		$sDefault = Dict::S('Core:AttributeArchiveDate/Label+', $sDefault);
-		return parent::GetDescription($sDefault);
-	}
-}
-
-class AttributeObsolescenceFlag extends AttributeBoolean
-{
-	public function __construct($sCode)
-	{
-		parent::__construct($sCode, array("allowed_values"=>null, "sql"=>$sCode, "default_value"=>"", "is_null_allowed"=>false, "depends_on"=>array()));
-	}
-	public function IsWritable()
-	{
-		return false;
-	}
-	public function IsMagic()
-	{
-		return true;
-	}
-
-	static public function IsBasedOnDBColumns() {return false;}
-	/**
-	 * Returns true if the attribute value is built after other attributes by the mean of an expression (obtained via GetOQLExpression)
-	 * @return bool
-	 */
-	static public function IsBasedOnOQLExpression() {return true;}
-	public function GetOQLExpression()
-	{
-		return MetaModel::GetObsolescenceExpression($this->GetHostClass());
-	}
-
-	public function GetSQLExpressions($sPrefix = '')
-	{
-		return array();
-	}
-	public function GetSQLColumns($bFullSpec = false) {return array();} // returns column/spec pairs (1 in most of the cases), for STRUCTURING (DB creation)
-	public function GetSQLValues($value) {return array();} // returns column/value pairs (1 in most of the cases), for WRITING (Insert, Update)
-
-	public function GetEditClass() {return "";}
-
-	public function GetValuesDef() {return null;}
-	public function GetPrerequisiteAttributes($sClass = null) {return $this->GetOptional("depends_on", array());}
-
-	public function IsDirectField() {return true;}
-	static public function IsScalar() {return true;}
-	public function GetSQLExpr()
-	{
-		return null;
-	}
-
-	public function GetDefaultValue(DBObject $oHostObject = null) {return $this->MakeRealValue("", $oHostObject);}
-	public function IsNullAllowed() {return false;}
-
-	public function GetLabel($sDefault = null)
-	{
-		$sDefault = Dict::S('Core:AttributeObsolescenceFlag/Label', $sDefault);
-		return parent::GetLabel($sDefault);
-	}
-	public function GetDescription($sDefault = null)
-	{
-		$sDefault = Dict::S('Core:AttributeObsolescenceFlag/Label+', $sDefault);
-		return parent::GetDescription($sDefault);
-	}
-}
-
-class AttributeObsolescenceDate extends AttributeDate
-{
-	public function GetLabel($sDefault = null)
-	{
-		$sDefault = Dict::S('Core:AttributeObsolescenceDate/Label', $sDefault);
-		return parent::GetLabel($sDefault);
-	}
-	public function GetDescription($sDefault = null)
-	{
-		$sDefault = Dict::S('Core:AttributeObsolescenceDate/Label+', $sDefault);
-		return parent::GetDescription($sDefault);
-	}
-}
+<?php
+// Copyright (C) 2010-2018 Combodo SARL
+//
+//   This file is part of iTop.
+//
+//   iTop is free software; you can redistribute it and/or modify	
+//   it under the terms of the GNU Affero General Public License as published by
+//   the Free Software Foundation, either version 3 of the License, or
+//   (at your option) any later version.
+//
+//   iTop is distributed in the hope that it will be useful,
+//   but WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//   GNU Affero General Public License for more details.
+//
+//   You should have received a copy of the GNU Affero General Public License
+//   along with iTop. If not, see <http://www.gnu.org/licenses/>
+
+
+/**
+ * Typology for the attributes
+ *
+ * @copyright   Copyright (C) 2010-2018 Combodo SARL
+ * @license	 http://opensource.org/licenses/AGPL-3.0
+ */
+
+
+require_once('MyHelpers.class.inc.php');
+require_once('ormdocument.class.inc.php');
+require_once('ormstopwatch.class.inc.php');
+require_once('ormpassword.class.inc.php');
+require_once('ormcaselog.class.inc.php');
+require_once('ormlinkset.class.inc.php');
+require_once('ormtagset.class.inc.php');
+require_once('htmlsanitizer.class.inc.php');
+require_once(APPROOT.'sources/autoload.php');
+require_once('customfieldshandler.class.inc.php');
+require_once('ormcustomfieldsvalue.class.inc.php');
+require_once('datetimeformat.class.inc.php');
+// This should be changed to a use when we go full-namespace
+require_once(APPROOT . 'sources/form/validator/validator.class.inc.php');
+require_once(APPROOT . 'sources/form/validator/notemptyextkeyvalidator.class.inc.php');
+
+/**
+ * MissingColumnException - sent if an attribute is being created but the column is missing in the row 
+ *
+ * @package	 iTopORM
+ */
+class MissingColumnException extends Exception
+{}
+
+/**
+ * add some description here... 
+ *
+ * @package	 iTopORM
+ */
+define('EXTKEY_RELATIVE', 1);
+
+/**
+ * add some description here... 
+ *
+ * @package	 iTopORM
+ */
+define('EXTKEY_ABSOLUTE', 2);
+
+/**
+ * Propagation of the deletion through an external key - ask the user to delete the referencing object 
+ *
+ * @package	 iTopORM
+ */
+define('DEL_MANUAL', 1);
+
+/**
+ * Propagation of the deletion through an external key - ask the user to delete the referencing object 
+ *
+ * @package	 iTopORM
+ */
+define('DEL_AUTO', 2);
+/**
+ * Fully silent delete... not yet implemented
+ */
+define('DEL_SILENT', 2);
+/**
+ * For HierarchicalKeys only: move all the children up one level automatically
+ */
+define('DEL_MOVEUP', 3);
+
+
+/**
+ * For Link sets: tracking_level
+ *
+ * @package	 iTopORM
+ */
+define('ATTRIBUTE_TRACKING_NONE', 0); // Do not track changes of the attribute
+define('ATTRIBUTE_TRACKING_ALL', 3); // Do track all changes of the attribute
+define('LINKSET_TRACKING_NONE', 0); // Do not track changes in the link set
+define('LINKSET_TRACKING_LIST', 1); // Do track added/removed items
+define('LINKSET_TRACKING_DETAILS', 2); // Do track modified items
+define('LINKSET_TRACKING_ALL', 3); // Do track added/removed/modified items
+
+define('LINKSET_EDITMODE_NONE', 0); // The linkset cannot be edited at all from inside this object
+define('LINKSET_EDITMODE_ADDONLY', 1); // The only possible action is to open a new window to create a new object
+define('LINKSET_EDITMODE_ACTIONS', 2); // Show the usual 'Actions' popup menu
+define('LINKSET_EDITMODE_INPLACE', 3); // The "linked" objects can be created/modified/deleted in place
+define('LINKSET_EDITMODE_ADDREMOVE', 4); // The "linked" objects can be added/removed in place
+
+
+/**
+ * Attribute definition API, implemented in and many flavours (Int, String, Enum, etc.) 
+ *
+ * @package	 iTopORM
+ */
+abstract class AttributeDefinition
+{
+	const SEARCH_WIDGET_TYPE_RAW = 'raw';
+	const SEARCH_WIDGET_TYPE_STRING = 'string';
+	const SEARCH_WIDGET_TYPE_NUMERIC = 'numeric';
+	const SEARCH_WIDGET_TYPE_ENUM = 'enum';
+	const SEARCH_WIDGET_TYPE_EXTERNAL_KEY = 'external_key';
+	const SEARCH_WIDGET_TYPE_HIERARCHICAL_KEY = 'hierarchical_key';
+	const SEARCH_WIDGET_TYPE_EXTERNAL_FIELD = 'external_field';
+	const SEARCH_WIDGET_TYPE_DATE_TIME = 'date_time';
+	const SEARCH_WIDGET_TYPE_DATE = 'date';
+
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	const INDEX_LENGTH = 95;
+
+	public function GetType()
+	{
+		return Dict::S('Core:'.get_class($this));
+	}
+	public function GetTypeDesc()
+	{
+		return Dict::S('Core:'.get_class($this).'+');
+	}
+
+	abstract public function GetEditClass();
+
+	/**
+	 * Return the search widget type corresponding to this attribute
+	 *
+	 * @return string
+	 */
+	public function GetSearchType()
+	{
+		return static::SEARCH_WIDGET_TYPE;
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function IsSearchable()
+	{
+		return static::SEARCH_WIDGET_TYPE != static::SEARCH_WIDGET_TYPE_RAW;
+	}
+
+	protected $m_sCode;
+	private $m_aParams = array();
+	protected $m_sHostClass = '!undefined!';
+	public function Get($sParamName) {return $this->m_aParams[$sParamName];}
+
+	public function GetIndexLength() {
+		$iMaxLength = $this->GetMaxSize();
+		if (is_null($iMaxLength))
+		{
+			return null;
+		}
+		if ($iMaxLength > static::INDEX_LENGTH)
+		{
+			return static::INDEX_LENGTH;
+		}
+		return $iMaxLength;
+	}
+
+	public function IsParam($sParamName) {return (array_key_exists($sParamName, $this->m_aParams));}
+
+	protected function GetOptional($sParamName, $default)
+	{
+		if (array_key_exists($sParamName, $this->m_aParams))
+		{
+			return $this->m_aParams[$sParamName];
+		}
+		else
+		{
+			return $default;
+		}
+	}
+
+    /**
+     * AttributeDefinition constructor.
+     *
+     * @param string $sCode
+     * @param array $aParams
+     *
+     * @throws \Exception
+     */
+    public function __construct($sCode, $aParams)
+	{
+		$this->m_sCode = $sCode;
+		$this->m_aParams = $aParams;
+		$this->ConsistencyCheck();
+	}
+
+	public function GetParams()
+	{
+		return $this->m_aParams;
+	}
+
+	public function HasParam($sParam)
+	{
+		return array_key_exists($sParam, $this->m_aParams);
+	}
+
+	public function SetHostClass($sHostClass)
+	{
+		$this->m_sHostClass = $sHostClass;
+	}
+	public function GetHostClass()
+	{
+		return $this->m_sHostClass;
+	}
+
+    /**
+     * @return array
+     *
+     * @throws \CoreException
+     */
+    public function ListSubItems()
+	{
+		$aSubItems = array();
+		foreach(MetaModel::ListAttributeDefs($this->m_sHostClass) as $sAttCode => $oAttDef)
+		{
+			if ($oAttDef instanceof AttributeSubItem)
+			{
+				if ($oAttDef->Get('target_attcode') == $this->m_sCode)
+				{
+					$aSubItems[$sAttCode] = $oAttDef;
+				}
+			}
+		}
+		return $aSubItems;
+	}
+
+	// Note: I could factorize this code with the parameter management made for the AttributeDef class
+	// to be overloaded
+	static public function ListExpectedParams()
+	{
+		return array();
+	}
+
+    /**
+     * @throws \Exception
+     */
+    private function ConsistencyCheck()
+	{
+		// Check that any mandatory param has been specified
+		//
+		$aExpectedParams = $this->ListExpectedParams();
+		foreach($aExpectedParams as $sParamName)
+		{
+			if (!array_key_exists($sParamName, $this->m_aParams))
+			{
+				$aBacktrace = debug_backtrace();
+				$sTargetClass = $aBacktrace[2]["class"];
+				$sCodeInfo = $aBacktrace[1]["file"]." - ".$aBacktrace[1]["line"];
+				throw new Exception("ERROR missing parameter '$sParamName' in ".get_class($this)." declaration for class $sTargetClass ($sCodeInfo)");
+			}
+		}
+	}
+
+	/**
+	 * Check the validity of the given value
+	 *
+	 * @param \DBObject $oHostObject
+	 * @param $value Object error if any, null otherwise
+	 *
+	 * @return bool
+	 */
+	public function CheckValue(DBObject $oHostObject, $value)
+	{
+		// later: factorize here the cases implemented into DBObject
+		return true;
+	}
+
+	// table, key field, name field
+
+    /**
+     * @return string
+     * @deprecated never used
+     */
+	public function ListDBJoins()
+	{
+		return "";
+		// e.g: return array("Site", "infrid", "name");
+	}
+
+	public function GetFinalAttDef()
+	{
+		return $this;
+	}
+
+	/**
+	 * Deprecated - use IsBasedOnDBColumns instead
+	 * @return bool
+	 */
+	public function IsDirectField() {return static::IsBasedOnDBColumns();}
+
+	/**
+	 * Returns true if the attribute value is built after DB columns
+	 * @return bool
+	 */
+	static public function IsBasedOnDBColumns() {return false;}
+	/**
+	 * Returns true if the attribute value is built after other attributes by the mean of an expression (obtained via GetOQLExpression)
+	 * @return bool
+	 */
+	static public function IsBasedOnOQLExpression() {return false;}
+	/**
+	 * Returns true if the attribute value can be shown as a string
+	 * @return bool
+	 */
+	static public function IsScalar() {return false;}
+	/**
+	 * Returns true if the attribute value is a set of related objects (1-N or N-N)
+	 * @return bool
+	 */
+	static public function IsLinkSet() {return false;}
+
+	/**
+	 * @param int $iType
+	 *
+	 * @return bool true if the attribute is an external key, either directly (RELATIVE to the host class), or indirectly (ABSOLUTELY)
+	 */
+	public function IsExternalKey($iType = EXTKEY_RELATIVE)
+	{
+		return false;
+	}
+	/**
+	 * @return bool true if the attribute value is an external key, pointing to the host class
+	 */
+	static public function IsHierarchicalKey() {return false;}
+	/**
+	 * @return bool true if the attribute value is stored on an object pointed to be an external key
+	 */
+	static public function IsExternalField() {return false;}
+	/**
+	 * @return bool true if the attribute can be written (by essence : metamodel field option)
+	 * @see \DBObject::IsAttributeReadOnlyForCurrentState() for a specific object instance (depending on its workflow)
+	 */
+	public function IsWritable() {return false;}
+	/**
+	 * @return bool true if the attribute has been added automatically by the framework
+	 */
+	public function IsMagic() {return $this->GetOptional('magic', false);}
+	/**
+	 * @return bool true if the attribute value is kept in the loaded object (in memory)
+	 */
+	static public function LoadInObject() {return true;}
+	/**
+	 * @return bool true if the attribute value comes from the database in one way or another
+	 */
+	static public function LoadFromDB() {return true;}
+	/**
+	 * @return bool true if the attribute should be loaded anytime (in addition to the column selected by the user)
+	 */
+	public function AlwaysLoadInTables() {return $this->GetOptional('always_load_in_tables', false);}
+
+	/**
+	 * @param \DBObject $oHostObject
+	 *
+	 * @return mixed Must return the value if LoadInObject returns false
+	 */
+	public function GetValue($oHostObject)
+	{
+		return null;
+	}
+
+	/**
+	 * Returns true if the attribute must not be stored if its current value is "null" (Cf. IsNull())
+	 * @return bool
+	 */
+	public function IsNullAllowed() {return true;}
+	/**
+	 * Returns the attribute code (identifies the attribute in the host class)
+	 * @return string
+	 */
+	public function GetCode() {return $this->m_sCode;}
+
+	/**
+	 * Find the corresponding "link" attribute on the target class, if any
+	 * @return null | AttributeDefinition
+	 */
+	public function GetMirrorLinkAttribute() {return null;}
+
+	/**
+	 * Helper to browse the hierarchy of classes, searching for a label
+	 *
+	 * @param string $sDictEntrySuffix
+	 * @param string $sDefault
+	 * @param bool $bUserLanguageOnly
+	 *
+	 * @return string
+	 * @throws \Exception
+	 */
+	protected function SearchLabel($sDictEntrySuffix, $sDefault, $bUserLanguageOnly)
+	{
+		$sLabel = Dict::S('Class:'.$this->m_sHostClass.$sDictEntrySuffix, '', $bUserLanguageOnly);
+		if (strlen($sLabel) == 0)
+		{
+			// Nothing found: go higher in the hierarchy (if possible)
+			//
+			$sLabel = $sDefault;
+			$sParentClass = MetaModel::GetParentClass($this->m_sHostClass);
+			if ($sParentClass)
+			{
+				if (MetaModel::IsValidAttCode($sParentClass, $this->m_sCode))
+				{
+					$oAttDef = MetaModel::GetAttributeDef($sParentClass, $this->m_sCode);
+					$sLabel = $oAttDef->SearchLabel($sDictEntrySuffix, $sDefault, $bUserLanguageOnly);
+				}
+			}
+		}
+		return $sLabel;
+	}
+
+    /**
+     * @param string|null $sDefault
+     *
+     * @return string
+     *
+     * @throws \Exception
+     */
+    public function GetLabel($sDefault = null)
+	{
+		$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode, null, true /*user lang*/);
+		if (is_null($sLabel))
+		{
+			// If no default value is specified, let's define the most relevant one for developping purposes
+			if (is_null($sDefault))
+			{
+				$sDefault = str_replace('_', ' ', $this->m_sCode);
+			}
+			// Browse the hierarchy again, accepting default (english) translations
+			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode, $sDefault, false);
+		}
+		return $sLabel;
+	}
+
+	/**
+	 * To be overloaded for localized enums
+	 *
+	 * @param string $sValue
+	 *
+	 * @return string label corresponding to the given value (in plain text)
+	 */
+	public function GetValueLabel($sValue)
+	{
+		return $sValue;
+	}
+
+	/**
+	 * Get the value from a given string (plain text, CSV import)
+	 *
+	 * @param string $sProposedValue
+	 * @param bool $bLocalizedValue
+	 * @param string $sSepItem
+	 * @param string $sSepAttribute
+	 * @param string $sSepValue
+	 * @param string $sAttributeQualifier
+	 *
+	 * @return mixed null if no match could be found
+	 */
+	public function MakeValueFromString(
+		$sProposedValue,
+		$bLocalizedValue = false,
+		$sSepItem = null,
+		$sSepAttribute = null,
+		$sSepValue = null,
+		$sAttributeQualifier = null
+	)
+	{
+		return $this->MakeRealValue($sProposedValue, null);
+	}
+
+	/**
+	 * Parses a search string coming from user input
+	 * @param string $sSearchString
+	 * @return string
+	 */
+	public function ParseSearchString($sSearchString)
+	{
+		return $sSearchString;
+	}
+
+    /**
+     * @return string
+     *
+     * @throws \Exception
+     */
+    public function GetLabel_Obsolete()
+	{
+		// Written for compatibility with a data model written prior to version 0.9.1
+		if (array_key_exists('label', $this->m_aParams))
+		{
+			return $this->m_aParams['label'];
+		}
+		else
+		{
+			return $this->GetLabel();
+		}
+	}
+
+    /**
+     * @param string|null $sDefault
+     *
+     * @return string
+     *
+     * @throws \Exception
+     */
+    public function GetDescription($sDefault = null)
+	{
+		$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'+', null, true /*user lang*/);
+		if (is_null($sLabel))
+		{
+			// If no default value is specified, let's define the most relevant one for developping purposes
+			if (is_null($sDefault))
+			{
+				$sDefault = '';
+			}
+			// Browse the hierarchy again, accepting default (english) translations
+			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'+', $sDefault, false);
+		}
+		return $sLabel;
+	}
+
+    /**
+     * @param string|null $sDefault
+     *
+     * @return string
+     *
+     * @throws \Exception
+     */
+    public function GetHelpOnEdition($sDefault = null)
+	{
+		$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'?', null, true /*user lang*/);
+		if (is_null($sLabel))
+		{
+			// If no default value is specified, let's define the most relevant one for developping purposes
+			if (is_null($sDefault))
+			{
+				$sDefault = '';
+			}
+			// Browse the hierarchy again, accepting default (english) translations
+			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'?', $sDefault, false);
+		}
+		return $sLabel;
+	} 
+
+	public function GetHelpOnSmartSearch()
+	{
+		$aParents = array_merge(array(get_class($this) => get_class($this)), class_parents($this));
+		foreach ($aParents as $sClass)
+		{
+			$sHelp = Dict::S("Core:$sClass?SmartSearch", '-missing-');
+			if ($sHelp != '-missing-')
+			{
+				return $sHelp;
+			}
+		} 
+		return '';
+	}
+
+    /**
+     * @return string
+     *
+     * @throws \Exception
+     */
+    public function GetDescription_Obsolete()
+	{
+		// Written for compatibility with a data model written prior to version 0.9.1
+		if (array_key_exists('description', $this->m_aParams))
+		{
+			return $this->m_aParams['description'];
+		}
+		else
+		{
+			return $this->GetDescription();
+		}
+	}
+
+	public function GetTrackingLevel()
+	{
+		return $this->GetOptional('tracking_level', ATTRIBUTE_TRACKING_ALL);
+	}
+
+	/**
+	 * @return \ValueSetObjects
+	 */
+	public function GetValuesDef() {return null;}
+
+	public function GetPrerequisiteAttributes($sClass = null)
+	{
+		return array();
+	}
+
+	public function GetNullValue() {return null;}
+
+	public function IsNull($proposedValue)
+	{
+		return is_null($proposedValue);
+	}
+
+	/**
+	 * force an allowed value (type conversion and possibly forces a value as mySQL would do upon writing!
+	 *
+	 * @param $proposedValue
+	 * @param $oHostObj
+	 *
+	 * @return mixed
+	 */
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		return $proposedValue;
+	}
+
+	public function Equals($val1, $val2) {return ($val1 == $val2);}
+
+	/**
+	 * @param string $sPrefix
+	 *
+	 * @return array suffix/expression pairs (1 in most of the cases), for READING (Select)
+	 */
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		return array();
+	}
+
+	/**
+	 * @param array $aCols
+	 * @param string $sPrefix
+	 *
+	 * @return mixed a value out of suffix/value pairs, for SELECT result interpretation
+	 */
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		return null;
+	}
+
+	/**
+	 * @param bool $bFullSpec
+	 *
+	 * @return array column/spec pairs (1 in most of the cases), for STRUCTURING (DB creation)
+	 * @see \CMDBSource::GetFieldSpec()
+	 */
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		return array();
+	}
+
+	/**
+	 * @param $value
+	 *
+	 * @return array column/value pairs (1 in most of the cases), for WRITING (Insert, Update)
+	 */
+	public function GetSQLValues($value)
+	{
+		return array();
+	}
+	public function RequiresIndex() {return false;}
+
+	public function RequiresFullTextIndex()
+	{
+		return false;
+	}
+	public function CopyOnAllTables() {return false;}
+
+	public function GetOrderBySQLExpressions($sClassAlias)
+	{
+		// Note: This is the responsibility of this function to place backticks around column aliases
+		return array('`'.$sClassAlias.$this->GetCode().'`');
+	}
+	
+	public function GetOrderByHint()
+	{
+		return '';
+	}
+
+   // Import - differs slightly from SQL input, but identical in most cases
+   //
+	public function GetImportColumns() {return $this->GetSQLColumns();}
+	public function FromImportToValue($aCols, $sPrefix = '')
+	{
+		$aValues = array();
+		foreach ($this->GetSQLExpressions($sPrefix) as $sAlias => $sExpr)
+		{
+			// This is working, based on the assumption that importable fields
+			// are not computed fields => the expression is the name of a column
+			$aValues[$sPrefix.$sAlias] = $aCols[$sExpr];
+		}
+		return $this->FromSQLToValue($aValues, $sPrefix);
+	}
+
+	public function GetValidationPattern()
+	{
+		return '';
+	}
+	
+	public function CheckFormat($value)
+	{
+		return true;
+	}
+	 
+	public function GetMaxSize()
+	{
+		return null;
+	}
+
+    /**
+     * @return mixed|null
+     * @deprecated never used
+     */
+	public function MakeValue()
+	{
+		$sComputeFunc = $this->Get("compute_func");
+		if (empty($sComputeFunc)) return null;
+
+		return call_user_func($sComputeFunc);
+	}
+	
+	abstract public function GetDefaultValue(DBObject $oHostObject = null);
+
+	//
+	// To be overloaded in subclasses
+	//
+	
+	abstract public function GetBasicFilterOperators(); // returns an array of "opCode"=>"description"
+	abstract public function GetBasicFilterLooseOperator(); // returns an "opCode"
+	//abstract protected GetBasicFilterHTMLInput();
+	abstract public function GetBasicFilterSQLExpr($sOpCode, $value); 
+
+	public function GetFilterDefinitions()
+	{
+		return array();
+	}
+
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		return (string)$sValue;
+	}
+
+	/**
+	 * For fields containing a potential markup, return the value without this markup
+	 *
+	 * @param string $sValue
+	 * @param \DBObject $oHostObj
+	 *
+	 * @return string
+	 */
+	public function GetAsPlainText($sValue, $oHostObj = null)
+	{
+		return (string) $this->GetEditValue($sValue, $oHostObj);
+	}
+
+	/**
+	 * Helper to get a value that will be JSON encoded
+	 * The operation is the opposite to FromJSONToValue
+	 *
+	 * @param $value
+	 *
+	 * @return string
+	 */
+	public function GetForJSON($value)
+	{
+		// In most of the cases, that will be the expected behavior...
+		return $this->GetEditValue($value);
+	}
+
+	/**
+	 * Helper to form a value, given JSON decoded data
+	 * The operation is the opposite to GetForJSON
+	 *
+	 * @param $json
+	 *
+	 * @return mixed
+	 */
+	public function FromJSONToValue($json)
+	{
+		// Passthrough in most of the cases
+		return $json;
+	}
+
+	/**
+	 * Override to display the value in the GUI
+	 *
+	 * @param string $sValue
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 *
+	 * @return string
+	 */
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		return Str::pure2html((string)$sValue);
+	}
+
+	/**
+	 * Override to export the value in XML
+	 *
+	 * @param string $sValue
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 *
+	 * @return mixed
+	 */
+	public function GetAsXML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		return Str::pure2xml((string)$sValue);
+	}
+
+	/**
+	 * Override to escape the value when read by DBObject::GetAsCSV()
+	 *
+	 * @param string $sValue
+	 * @param string $sSeparator
+	 * @param string $sTextQualifier
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 * @param bool $bConvertToPlainText
+	 *
+	 * @return string
+	 */
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		return (string)$sValue;
+	}
+
+	/**
+	 * Override to differentiate a value displayed in the UI or in the history
+	 *
+	 * @param string $sValue
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 *
+	 * @return string
+	 */
+	public function GetAsHTMLForHistory($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		return $this->GetAsHTML($sValue, $oHostObject, $bLocalize);
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\StringField';
+	}
+
+	/**
+	 * Override to specify Field class
+	 *
+	 * When called first, $oFormField is null and will be created (eg. Make). Then when the ::parent is called and the $oFormField is
+	 * passed, MakeFormField behave more like a Prepare.
+	 *
+	 * @param \DBObject $oObject
+	 * @param \Combodo\iTop\Form\Field\Field $oFormField
+	 *
+	 * @return null
+	 * @throws \CoreException
+	 * @throws \Exception
+	 */
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		// This is a fallback in case the AttributeDefinition subclass has no overloading of this function.
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+			//$oFormField->SetReadOnly(true);
+		}
+
+		$oFormField->SetLabel($this->GetLabel());
+
+		// Attributes flags
+		// - Retrieving flags for the current object
+		if ($oObject->IsNew())
+		{
+			$iFlags = $oObject->GetInitialStateAttributeFlags($this->GetCode());
+		}
+		else
+		{
+			$iFlags = $oObject->GetAttributeFlags($this->GetCode());
+		}
+
+		// - Comparing flags
+		if ($this->IsWritable() && (!$this->IsNullAllowed() || (($iFlags & OPT_ATT_MANDATORY) === OPT_ATT_MANDATORY)))
+		{
+			$oFormField->SetMandatory(true);
+		}
+		if ((!$oObject->IsNew() || !$oFormField->GetMandatory()) && (($iFlags & OPT_ATT_READONLY) === OPT_ATT_READONLY))
+		{
+			$oFormField->SetReadOnly(true);
+		}
+		
+		// CurrentValue
+		$oFormField->SetCurrentValue($oObject->Get($this->GetCode()));
+
+		// Validation pattern
+		if ($this->GetValidationPattern() !== '')
+		{
+			$oFormField->AddValidator(new \Combodo\iTop\Form\Validator\Validator($this->GetValidationPattern()));
+		}
+
+		return $oFormField;
+	}
+
+	/**
+	 * List the available verbs for 'GetForTemplate'
+	 */	 
+	public function EnumTemplateVerbs()
+	{
+		return array(
+			'' => 'Plain text (unlocalized) representation',
+			'html' => 'HTML representation',
+			'label' => 'Localized representation',
+			'text' => 'Plain text representation (without any markup)',
+		);
+	}
+
+	/**
+	 * Get various representations of the value, for insertion into a template (e.g. in Notifications)
+	 *
+	 * @param mixed $value The current value of the field
+	 * @param string $sVerb The verb specifying the representation of the value
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize Whether or not to localize the value
+	 *
+	 * @return mixed|null|string
+     *
+	 * @throws \Exception
+	 */
+	public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
+	{
+		if ($this->IsScalar())
+		{
+			switch ($sVerb)
+			{
+				case '':
+				return $value;
+				
+				case 'html':
+				return $this->GetAsHtml($value, $oHostObject, $bLocalize);
+				
+				case 'label':
+				return $this->GetEditValue($value);
+				
+				case 'text':
+				return $this->GetAsPlainText($value);
+				break;
+				
+				default:
+				throw new Exception("Unknown verb '$sVerb' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * @param array $aArgs
+	 * @param string $sContains
+	 *
+	 * @return array|null
+	 * @throws \CoreException
+	 * @throws \OQLException
+	 */
+	public function GetAllowedValues($aArgs = array(), $sContains = '')
+	{
+		$oValSetDef = $this->GetValuesDef();
+		if (!$oValSetDef) return null;
+		return $oValSetDef->GetValues($aArgs, $sContains);
+	}
+
+	/**
+	 * Explain the change of the attribute (history)
+	 *
+	 * @param string $sOldValue
+	 * @param string $sNewValue
+	 * @param string $sLabel
+	 *
+	 * @return string
+	 * @throws \ArchivedObjectException
+	 * @throws \CoreException
+	 * @throws \DictExceptionMissingString
+	 * @throws \OQLException
+	 * @throws \Exception
+	 */
+	public function DescribeChangeAsHTML($sOldValue, $sNewValue, $sLabel = null)
+	{
+		if (is_null($sLabel))
+		{
+			$sLabel = $this->GetLabel();
+		}
+
+		$sNewValueHtml = $this->GetAsHTMLForHistory($sNewValue);
+		$sOldValueHtml = $this->GetAsHTMLForHistory($sOldValue);
+
+		if($this->IsExternalKey())
+		{
+			/** @var \AttributeExternalKey $this */
+			$sTargetClass = $this->GetTargetClass();
+			$sOldValueHtml = (int)$sOldValue ? MetaModel::GetHyperLink($sTargetClass, (int)$sOldValue) : null;
+			$sNewValueHtml = (int)$sNewValue ? MetaModel::GetHyperLink($sTargetClass, (int)$sNewValue) : null;
+		}
+		if ( (($this->GetType() == 'String') || ($this->GetType() == 'Text')) &&
+			 (strlen($sNewValue) > strlen($sOldValue)) )
+		{
+			// Check if some text was not appended to the field
+			if (substr($sNewValue,0, strlen($sOldValue)) == $sOldValue) // Text added at the end
+			{
+				$sDelta = $this->GetAsHTML(substr($sNewValue, strlen($sOldValue)));
+				$sResult = Dict::Format('Change:Text_AppendedTo_AttName', $sDelta, $sLabel);
+			}
+			else if (substr($sNewValue, -strlen($sOldValue)) == $sOldValue)   // Text added at the beginning
+			{
+				$sDelta = $this->GetAsHTML(substr($sNewValue, 0, strlen($sNewValue) - strlen($sOldValue)));
+				$sResult = Dict::Format('Change:Text_AppendedTo_AttName', $sDelta, $sLabel);
+			}
+			else
+			{
+				if (strlen($sOldValue) == 0)
+				{
+					$sResult = Dict::Format('Change:AttName_SetTo', $sLabel, $sNewValueHtml);
+				}
+				else
+				{
+					if (is_null($sNewValue))
+					{
+						$sNewValueHtml = Dict::S('UI:UndefinedObject');
+					}
+					$sResult = Dict::Format('Change:AttName_SetTo_NewValue_PreviousValue_OldValue', $sLabel, $sNewValueHtml, $sOldValueHtml);
+				}
+			}
+		}
+		else
+		{
+			if (strlen($sOldValue) == 0)
+			{
+				$sResult = Dict::Format('Change:AttName_SetTo', $sLabel, $sNewValueHtml);
+			}
+			else
+			{
+				if (is_null($sNewValue))
+				{
+					$sNewValueHtml = Dict::S('UI:UndefinedObject');
+				}
+				$sResult = Dict::Format('Change:AttName_SetTo_NewValue_PreviousValue_OldValue', $sLabel, $sNewValueHtml, $sOldValueHtml);
+			}
+		}
+		return $sResult;
+	}
+
+
+    /**
+     * Parses a string to find some smart search patterns and build the corresponding search/OQL condition
+     * Each derived class is reponsible for defining and processing their own smart patterns, the base class
+     * does nothing special, and just calls the default (loose) operator
+     *
+     * @param string $sSearchText The search string to analyze for smart patterns
+     * @param \FieldExpression $oField
+     * @param array $aParams Values of the query parameters
+     *
+     * @return \Expression The search condition to be added (AND) to the current search
+     *
+     * @throws \CoreException
+     */
+	public function GetSmartConditionExpression($sSearchText, FieldExpression $oField, &$aParams)
+	{
+		$sParamName = $oField->GetParent().'_'.$oField->GetName();
+		$oRightExpr = new VariableExpression($sParamName);
+		$sOperator = $this->GetBasicFilterLooseOperator();
+		switch ($sOperator)
+		{
+			case 'Contains':
+			$aParams[$sParamName] = "%$sSearchText%";
+			$sSQLOperator = 'LIKE';
+			break;
+			
+			default:
+			$sSQLOperator = $sOperator;
+			$aParams[$sParamName] = $sSearchText;
+		}
+		$oNewCondition = new BinaryExpression($oField, $sSQLOperator, $oRightExpr);
+		return $oNewCondition;
+	}
+	
+	/**
+	 * Tells if an attribute is part of the unique fingerprint of the object (used for comparing two objects)
+	 * All attributes which value is not based on a value from the object itself (like ExternalFields or LinkedSet)
+	 * must be excluded from the object's signature
+	 * @return boolean
+	 */
+	public function IsPartOfFingerprint()
+	{
+		return true;
+	}
+	
+	/**
+	 * The part of the current attribute in the object's signature, for the supplied value
+	 * @param mixed $value The value of this attribute for the object
+	 * @return string The "signature" for this field/attribute
+	 */
+	public function Fingerprint($value)
+	{
+		return (string)$value;
+	}
+}
+
+/**
+ * Set of objects directly linked to an object, and being part of its definition  
+ *
+ * @package	 iTopORM
+ */
+class AttributeLinkedSet extends AttributeDefinition
+{
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("allowed_values", "depends_on", "linked_class", "ext_key_to_me", "count_min", "count_max"));
+	}
+
+	public function GetEditClass() {return "LinkedSet";}
+
+	public function IsWritable() {return true;}
+	static public function IsLinkSet() {return true;}
+	public function IsIndirect() {return false;} 
+
+	public function GetValuesDef() {return $this->Get("allowed_values");} 
+	public function GetPrerequisiteAttributes($sClass = null) {return $this->Get("depends_on");}
+
+    /**
+     * @param \DBObject|null $oHostObject
+     *
+     * @return \ormLinkSet
+     *
+     * @throws \Exception
+     * @throws \CoreException
+     * @throws \CoreWarning
+     */
+    public function GetDefaultValue(DBObject $oHostObject = null)
+	{
+		$sLinkClass = $this->GetLinkedClass();
+		$sExtKeyToMe = $this->GetExtKeyToMe();
+
+		// The class to target is not the current class, because if this is a derived class,
+		// it may differ from the target class, then things start to become confusing
+		/** @var \AttributeExternalKey $oRemoteExtKeyAtt */
+		$oRemoteExtKeyAtt = MetaModel::GetAttributeDef($sLinkClass, $sExtKeyToMe);
+		$sMyClass = $oRemoteExtKeyAtt->GetTargetClass();
+
+		$oMyselfSearch = new DBObjectSearch($sMyClass);
+		if ($oHostObject !== null)
+		{
+			$oMyselfSearch->AddCondition('id', $oHostObject->GetKey(), '=');
+		}
+
+		$oLinkSearch = new DBObjectSearch($sLinkClass);
+		$oLinkSearch->AddCondition_PointingTo($oMyselfSearch, $sExtKeyToMe);
+		if ($this->IsIndirect())
+		{
+			// Join the remote class so that the archive flag will be taken into account
+			/** @var \AttributeLinkedSetIndirect $this */
+			$sExtKeyToRemote = $this->GetExtKeyToRemote();
+			/** @var \AttributeExternalKey $oExtKeyToRemote */
+			$oExtKeyToRemote = MetaModel::GetAttributeDef($sLinkClass, $sExtKeyToRemote);
+			$sRemoteClass = $oExtKeyToRemote->GetTargetClass();
+			if (MetaModel::IsArchivable($sRemoteClass))
+			{
+				$oRemoteSearch = new DBObjectSearch($sRemoteClass);
+				/** @var \AttributeLinkedSetIndirect $this */
+				$oLinkSearch->AddCondition_PointingTo($oRemoteSearch, $this->GetExtKeyToRemote());
+			}
+		}
+		$oLinks = new DBObjectSet($oLinkSearch);
+		$oLinkSet = new ormLinkSet($this->GetHostClass(), $this->GetCode(), $oLinks);
+		return $oLinkSet;
+	}
+
+	public function GetTrackingLevel()
+	{
+		return $this->GetOptional('tracking_level', MetaModel::GetConfig()->Get('tracking_level_linked_set_default'));
+	}
+
+	public function GetEditMode()
+	{
+		return $this->GetOptional('edit_mode', LINKSET_EDITMODE_ACTIONS);
+	}
+	
+	public function GetLinkedClass() {return $this->Get('linked_class');}
+	public function GetExtKeyToMe() {return $this->Get('ext_key_to_me');}
+
+	public function GetBasicFilterOperators() {return array();}
+	public function GetBasicFilterLooseOperator() {return '';}
+	public function GetBasicFilterSQLExpr($sOpCode, $value) {return '';}
+
+    /**
+     * @param string $sValue
+     * @param \DBObject $oHostObject
+     * @param bool $bLocalize
+     *
+     * @return string|null
+     *
+     * @throws \CoreException
+     */
+    public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		if (is_object($sValue) && ($sValue instanceof ormLinkSet))
+		{
+			$sValue->Rewind();
+			$aItems = array();
+			while ($oObj = $sValue->Fetch())
+			{
+				// Show only relevant information (hide the external key to the current object)
+				$aAttributes = array();
+				foreach(MetaModel::ListAttributeDefs($this->GetLinkedClass()) as $sAttCode => $oAttDef)
+				{
+					if ($sAttCode == $this->GetExtKeyToMe()) continue;
+					if ($oAttDef->IsExternalField()) continue;
+					$sAttValue = $oObj->GetAsHTML($sAttCode);
+					if (strlen($sAttValue) > 0)
+					{
+						$aAttributes[] = $sAttValue;
+					}
+				}
+				$sAttributes = implode(', ', $aAttributes);
+				$aItems[] = $sAttributes;
+			}
+			return implode('<br/>', $aItems);
+		}
+		return null;
+	}
+
+    /**
+     * @param string $sValue
+     * @param \DBObject $oHostObject
+     * @param bool $bLocalize
+     *
+     * @return string
+     *
+     * @throws \CoreException
+     */
+    public function GetAsXML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		if (is_object($sValue) && ($sValue instanceof ormLinkSet))
+		{
+			$sValue->Rewind();
+			$sRes = "<Set>\n";
+			while ($oObj = $sValue->Fetch())
+			{
+				$sObjClass = get_class($oObj);
+				$sRes .= "<$sObjClass id=\"".$oObj->GetKey()."\">\n";
+				// Show only relevant information (hide the external key to the current object)
+				foreach(MetaModel::ListAttributeDefs($sObjClass) as $sAttCode => $oAttDef)
+				{
+					if ($sAttCode == 'finalclass')
+					{
+						if ($sObjClass == $this->GetLinkedClass())
+						{
+							// Simplify the output if the exact class could be determined implicitely
+							continue;
+						}
+					}
+					if ($sAttCode == $this->GetExtKeyToMe()) continue;
+					if ($oAttDef->IsExternalField())
+					{
+						/** @var \AttributeExternalField $oAttDef */
+						if ($oAttDef->GetKeyAttCode() == $this->GetExtKeyToMe()) continue;
+						/** @var AttributeExternalField $oAttDef */
+						if ($oAttDef->IsFriendlyName()) continue;
+					}
+					if ($oAttDef instanceof AttributeFriendlyName) continue;
+					if (!$oAttDef->IsScalar()) continue;
+					$sAttValue = $oObj->GetAsXML($sAttCode, $bLocalize);
+					$sRes .= "<$sAttCode>$sAttValue</$sAttCode>\n";
+				}
+				$sRes .= "</$sObjClass>\n";
+			}
+			$sRes .= "</Set>\n";
+		}
+		else
+		{
+			$sRes = '';
+		}
+		return $sRes;
+	}
+
+	/**
+	 * @param $sValue
+	 * @param string $sSeparator
+	 * @param string $sTextQualifier
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 * @param bool $bConvertToPlainText
+	 *
+	 * @return mixed|string
+	 * @throws \CoreException
+	 */
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		$sSepItem = MetaModel::GetConfig()->Get('link_set_item_separator');
+		$sSepAttribute = MetaModel::GetConfig()->Get('link_set_attribute_separator');
+		$sSepValue = MetaModel::GetConfig()->Get('link_set_value_separator');
+		$sAttributeQualifier = MetaModel::GetConfig()->Get('link_set_attribute_qualifier');
+
+		if (is_object($sValue) && ($sValue instanceof ormLinkSet))
+		{
+			$sValue->Rewind();
+			$aItems = array();
+			while ($oObj = $sValue->Fetch())
+			{
+				$sObjClass = get_class($oObj);
+				// Show only relevant information (hide the external key to the current object)
+				$aAttributes = array();
+				foreach(MetaModel::ListAttributeDefs($sObjClass) as $sAttCode => $oAttDef)
+				{
+					if ($sAttCode == 'finalclass')
+					{
+						if ($sObjClass == $this->GetLinkedClass())
+						{
+							// Simplify the output if the exact class could be determined implicitely 
+							continue;
+						}
+					}
+					if ($sAttCode == $this->GetExtKeyToMe()) continue;
+					if ($oAttDef->IsExternalField()) continue;
+					if (!$oAttDef->IsBasedOnDBColumns()) continue;
+					if (!$oAttDef->IsScalar()) continue;
+					$sAttValue = $oObj->GetAsCSV($sAttCode, $sSepValue, '', $bLocalize);
+					if (strlen($sAttValue) > 0)
+					{
+						$sAttributeData = str_replace($sAttributeQualifier, $sAttributeQualifier.$sAttributeQualifier, $sAttCode.$sSepValue.$sAttValue);
+						$aAttributes[] = $sAttributeQualifier.$sAttributeData.$sAttributeQualifier;
+					}
+				}
+				$sAttributes = implode($sSepAttribute, $aAttributes);
+				$aItems[] = $sAttributes;
+			}
+			$sRes = implode($sSepItem, $aItems);
+		}
+		else
+		{
+			$sRes = '';
+		}
+		$sRes = str_replace($sTextQualifier, $sTextQualifier.$sTextQualifier, $sRes);
+		$sRes = $sTextQualifier.$sRes.$sTextQualifier;
+		return $sRes;
+	}
+
+	/**
+	 * List the available verbs for 'GetForTemplate'
+	 */	 
+	public function EnumTemplateVerbs()
+	{
+		return array(
+			'' => 'Plain text (unlocalized) representation',
+			'html' => 'HTML representation (unordered list)',
+		);
+	}
+
+	/**
+	 * Get various representations of the value, for insertion into a template (e.g. in Notifications)
+	 *
+	 * @param mixed $value The current value of the field
+	 * @param string $sVerb The verb specifying the representation of the value
+	 * @param DBObject $oHostObject The object
+	 * @param bool $bLocalize Whether or not to localize the value
+	 *
+	 * @return string
+	 * @throws \Exception
+	 */
+	public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
+	{
+		$sRemoteName = $this->IsIndirect() ?
+			/** @var \AttributeLinkedSetIndirect $this */
+			$this->GetExtKeyToRemote().'_friendlyname' : 'friendlyname';
+
+		$oLinkSet = clone $value; // Workaround/Safety net for Trac #887
+		$iLimit = MetaModel::GetConfig()->Get('max_linkset_output');
+		$iCount = 0;
+		$aNames = array();
+		foreach($oLinkSet as $oItem)
+		{
+			if (($iLimit > 0) && ($iCount == $iLimit))
+			{
+				$iTotal = $oLinkSet->Count();
+				$aNames[] = '... '.Dict::Format('UI:TruncatedResults', $iCount, $iTotal);
+				break;
+			}
+			$aNames[] = $oItem->Get($sRemoteName);
+			$iCount++;
+		}
+
+		switch($sVerb)
+		{
+			case '':
+			return implode("\n", $aNames);
+					
+			case 'html':
+			return '<ul><li>'.implode("</li><li>", $aNames).'</li></ul>';
+			
+			default:
+			throw new Exception("Unknown verb '$sVerb' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
+		}
+	}
+
+	public function DuplicatesAllowed() {return false;} // No duplicates for 1:n links, never
+
+	public function GetImportColumns()
+	{
+		$aColumns = array();
+		$aColumns[$this->GetCode()] = 'TEXT';
+		return $aColumns;
+	}
+
+	/**
+	 * @param string $sProposedValue
+	 * @param bool $bLocalizedValue
+	 * @param string $sSepItem
+	 * @param string $sSepAttribute
+	 * @param string $sSepValue
+	 * @param string $sAttributeQualifier
+	 *
+	 * @return \DBObjectSet|mixed
+	 * @throws \CSVParserException
+	 * @throws \CoreException
+	 * @throws \CoreUnexpectedValue
+	 * @throws \MissingQueryArgument
+	 * @throws \MySQLException
+	 * @throws \MySQLHasGoneAwayException
+	 * @throws \Exception
+	 */
+	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
+	{
+		if (is_null($sSepItem) || empty($sSepItem))
+		{
+			$sSepItem = MetaModel::GetConfig()->Get('link_set_item_separator');
+		}
+		if (is_null($sSepAttribute) || empty($sSepAttribute))
+		{
+			$sSepAttribute = MetaModel::GetConfig()->Get('link_set_attribute_separator');
+		}
+		if (is_null($sSepValue) || empty($sSepValue))
+		{
+			$sSepValue = MetaModel::GetConfig()->Get('link_set_value_separator');
+		}
+		if (is_null($sAttributeQualifier) || empty($sAttributeQualifier))
+		{
+			$sAttributeQualifier = MetaModel::GetConfig()->Get('link_set_attribute_qualifier');
+		}
+
+		$sTargetClass = $this->Get('linked_class');
+
+		$sInput = str_replace($sSepItem, "\n", $sProposedValue);
+		$oCSVParser = new CSVParser($sInput, $sSepAttribute, $sAttributeQualifier);
+
+		$aInput = $oCSVParser->ToArray(0 /* do not skip lines */);
+
+		$aLinks = array();
+		foreach($aInput as $aRow)
+		{
+			// 1st - get the values, split the extkey->searchkey specs, and eventually get the finalclass value
+			$aExtKeys = array();
+			$aValues = array();
+			foreach($aRow as $sCell)
+			{
+				$iSepPos = strpos($sCell, $sSepValue);
+				if ($iSepPos === false)
+				{
+					// Houston...
+					throw new CoreException('Wrong format for link attribute specification', array('value' => $sCell));
+				}
+
+				$sAttCode = trim(substr($sCell, 0, $iSepPos));
+				$sValue = substr($sCell, $iSepPos + strlen($sSepValue));
+
+				if (preg_match('/^(.+)->(.+)$/', $sAttCode, $aMatches))
+				{
+					$sKeyAttCode = $aMatches[1];
+					$sRemoteAttCode = $aMatches[2];
+					$aExtKeys[$sKeyAttCode][$sRemoteAttCode] = $sValue;
+					if (!MetaModel::IsValidAttCode($sTargetClass, $sKeyAttCode))
+					{
+						throw new CoreException('Wrong attribute code for link attribute specification', array('class' => $sTargetClass, 'attcode' => $sKeyAttCode));
+					}
+					/** @var \AttributeExternalKey $oKeyAttDef */
+					$oKeyAttDef = MetaModel::GetAttributeDef($sTargetClass, $sKeyAttCode);
+					$sRemoteClass = $oKeyAttDef->GetTargetClass();
+					if (!MetaModel::IsValidAttCode($sRemoteClass, $sRemoteAttCode))
+					{
+						throw new CoreException('Wrong attribute code for link attribute specification', array('class' => $sRemoteClass, 'attcode' => $sRemoteAttCode));
+					}
+				}
+				else
+				{
+					if(!MetaModel::IsValidAttCode($sTargetClass, $sAttCode))
+					{
+						throw new CoreException('Wrong attribute code for link attribute specification', array('class' => $sTargetClass, 'attcode' => $sAttCode));
+					}
+					$oAttDef = MetaModel::GetAttributeDef($sTargetClass, $sAttCode);
+					$aValues[$sAttCode] = $oAttDef->MakeValueFromString($sValue, $bLocalizedValue, $sSepItem, $sSepAttribute, $sSepValue, $sAttributeQualifier);
+				}
+			}
+
+			// 2nd - Instanciate the object and set the value
+			if (isset($aValues['finalclass']))
+			{
+				$sLinkClass = $aValues['finalclass'];
+				if (!is_subclass_of($sLinkClass, $sTargetClass))
+				{
+					throw new CoreException('Wrong class for link attribute specification', array('requested_class' => $sLinkClass, 'expected_class' => $sTargetClass));
+				}
+			}
+			elseif (MetaModel::IsAbstract($sTargetClass))
+			{
+					throw new CoreException('Missing finalclass for link attribute specification');
+			}
+			else
+			{
+				$sLinkClass = $sTargetClass;
+			}
+
+			$oLink = MetaModel::NewObject($sLinkClass);
+			foreach ($aValues as $sAttCode => $sValue)
+			{
+				$oLink->Set($sAttCode, $sValue);
+			}
+
+			// 3rd - Set external keys from search conditions
+			foreach ($aExtKeys as $sKeyAttCode => $aReconciliation)
+			{
+				$oKeyAttDef = MetaModel::GetAttributeDef($sTargetClass, $sKeyAttCode);
+				$sKeyClass = $oKeyAttDef->GetTargetClass();
+				$oExtKeyFilter = new DBObjectSearch($sKeyClass);
+				$aReconciliationDesc = array();
+				foreach($aReconciliation as $sRemoteAttCode => $sValue)
+				{
+					$oExtKeyFilter->AddCondition($sRemoteAttCode, $sValue, '=');
+					$aReconciliationDesc[] = "$sRemoteAttCode=$sValue";
+				}
+				$oExtKeySet = new DBObjectSet($oExtKeyFilter);
+				switch($oExtKeySet->Count())
+				{
+				case 0:
+					$sReconciliationDesc = implode(', ', $aReconciliationDesc);
+					throw new CoreException("Found no match", array('ext_key' => $sKeyAttCode, 'reconciliation' => $sReconciliationDesc));
+					break;
+				case 1:
+					$oRemoteObj = $oExtKeySet->Fetch();
+					$oLink->Set($sKeyAttCode, $oRemoteObj->GetKey());
+					break;
+				default:
+					$sReconciliationDesc = implode(', ', $aReconciliationDesc);
+					throw new CoreException("Found several matches", array('ext_key' => $sKeyAttCode, 'reconciliation' => $sReconciliationDesc));
+					// Found several matches, ambiguous
+				}
+			}
+
+			// Check (roughly) if such a link is valid
+			$aErrors = array();
+			foreach(MetaModel::ListAttributeDefs($sTargetClass) as $sAttCode => $oAttDef)
+			{
+				if ($oAttDef->IsExternalKey())
+				{
+					/** @var \AttributeExternalKey $oAttDef */
+					if (($oAttDef->GetTargetClass() == $this->GetHostClass()) || (is_subclass_of($this->GetHostClass(), $oAttDef->GetTargetClass())))
+					{
+						continue; // Don't check the key to self
+					}
+				}
+				
+				if ($oAttDef->IsWritable() && $oAttDef->IsNull($oLink->Get($sAttCode)) && !$oAttDef->IsNullAllowed())
+				{
+					$aErrors[] = $sAttCode;
+				}
+			}
+			if (count($aErrors) > 0)
+			{
+				throw new CoreException("Missing value for mandatory attribute(s): ".implode(', ', $aErrors));
+			}
+
+			$aLinks[] = $oLink;
+		}
+		$oSet = DBObjectSet::FromArray($sTargetClass, $aLinks);
+		return $oSet;
+	}
+
+	/**
+	 * Helper to get a value that will be JSON encoded
+	 * The operation is the opposite to FromJSONToValue
+	 *
+	 * @param \ormLinkSet $value
+	 *
+	 * @return array
+	 * @throws \CoreException
+	 */
+	public function GetForJSON($value)
+	{
+		$aRet = array();
+		if (is_object($value) && ($value instanceof ormLinkSet))
+		{
+			$value->Rewind();
+			while ($oObj = $value->Fetch())
+			{
+				$sObjClass = get_class($oObj);
+				// Show only relevant information (hide the external key to the current object)
+				$aAttributes = array();
+				foreach(MetaModel::ListAttributeDefs($sObjClass) as $sAttCode => $oAttDef)
+				{
+					if ($sAttCode == 'finalclass')
+					{
+						if ($sObjClass == $this->GetLinkedClass())
+						{
+							// Simplify the output if the exact class could be determined implicitely 
+							continue;
+						}
+					}
+					if ($sAttCode == $this->GetExtKeyToMe()) continue;
+					if ($oAttDef->IsExternalField()) continue;
+					if (!$oAttDef->IsBasedOnDBColumns()) continue;
+					if (!$oAttDef->IsScalar()) continue;
+					$attValue = $oObj->Get($sAttCode);
+					$aAttributes[$sAttCode] = $oAttDef->GetForJSON($attValue);
+				}
+				$aRet[] = $aAttributes;
+			}
+		}
+		return $aRet;
+	}
+
+	/**
+	 * Helper to form a value, given JSON decoded data
+	 * The operation is the opposite to GetForJSON
+	 *
+	 * @param $json
+	 *
+	 * @return \DBObjectSet
+	 * @throws \CoreException
+	 * @throws \CoreUnexpectedValue
+	 * @throws \Exception
+	 */
+	public function FromJSONToValue($json)
+	{
+		$sTargetClass = $this->Get('linked_class');
+
+		$aLinks = array();
+		foreach($json as $aValues)
+		{
+			if (isset($aValues['finalclass']))
+			{
+				$sLinkClass = $aValues['finalclass'];
+				if (!is_subclass_of($sLinkClass, $sTargetClass))
+				{
+					throw new CoreException('Wrong class for link attribute specification', array('requested_class' => $sLinkClass, 'expected_class' => $sTargetClass));
+				}
+			}
+			elseif (MetaModel::IsAbstract($sTargetClass))
+			{
+					throw new CoreException('Missing finalclass for link attribute specification');
+			}
+			else
+			{
+				$sLinkClass = $sTargetClass;
+			}
+
+			$oLink = MetaModel::NewObject($sLinkClass);
+			foreach ($aValues as $sAttCode => $sValue)
+			{
+				$oLink->Set($sAttCode, $sValue);
+			}
+
+			// Check (roughly) if such a link is valid
+			$aErrors = array();
+			foreach(MetaModel::ListAttributeDefs($sTargetClass) as $sAttCode => $oAttDef)
+			{
+				if ($oAttDef->IsExternalKey())
+				{
+					/** @var AttributeExternalKey $oAttDef */
+					if (($oAttDef->GetTargetClass() == $this->GetHostClass()) || (is_subclass_of($this->GetHostClass(), $oAttDef->GetTargetClass())))
+					{
+						continue; // Don't check the key to self
+					}
+				}
+				
+				if ($oAttDef->IsWritable() && $oAttDef->IsNull($oLink->Get($sAttCode)) && !$oAttDef->IsNullAllowed())
+				{
+					$aErrors[] = $sAttCode;
+				}
+			}
+			if (count($aErrors) > 0)
+			{
+				throw new CoreException("Missing value for mandatory attribute(s): ".implode(', ', $aErrors));
+			}
+
+			$aLinks[] = $oLink;
+		}
+		$oSet = DBObjectSet::FromArray($sTargetClass, $aLinks);
+		return $oSet;
+	}
+
+	/**
+	 * @param $proposedValue
+	 * @param $oHostObj
+	 *
+	 * @return mixed
+	 * @throws \Exception
+	 */
+    public function MakeRealValue($proposedValue, $oHostObj){
+        if($proposedValue === null)
+        {
+            $sLinkedClass = $this->GetLinkedClass();
+            $aLinkedObjectsArray = array();
+            $oSet = DBObjectSet::FromArray($sLinkedClass, $aLinkedObjectsArray);
+
+            return new ormLinkSet(
+                get_class($oHostObj),
+                $this->GetCode(),
+                $oSet
+            );
+        }
+
+        return $proposedValue;
+    }
+
+	/**
+	 * @param ormLinkSet $val1
+	 * @param ormLinkSet $val2
+	 * @return bool
+	 */
+	public function Equals($val1, $val2)
+	{
+		if ($val1 === $val2)
+		{
+			$bAreEquivalent = true;
+		}
+		else
+		{
+            $bAreEquivalent = ($val2->HasDelta() === false);
+		}
+		return $bAreEquivalent;
+	}
+
+	/**
+	 * Find the corresponding "link" attribute on the target class, if any
+	 *
+	 * @return null | AttributeDefinition
+	 * @throws \Exception
+	 */
+	public function GetMirrorLinkAttribute()
+	{
+		$oRemoteAtt = MetaModel::GetAttributeDef($this->GetLinkedClass(), $this->GetExtKeyToMe());
+		return $oRemoteAtt;
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\LinkedSetField';
+	}
+
+	/**
+	 * @param \DBObject $oObject
+	 * @param \Combodo\iTop\Form\Field\LinkedSetField $oFormField
+	 *
+	 * @return \Combodo\iTop\Form\Field\LinkedSetField
+	 * @throws \CoreException
+	 * @throws \DictExceptionMissingString
+	 * @throws \Exception
+	 */
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+		
+		// Setting target class
+		if (!$this->IsIndirect())
+		{
+			$sTargetClass = $this->GetLinkedClass();
+		}
+		else
+		{
+			/** @var \AttributeExternalKey $oRemoteAttDef */
+			/** @var \AttributeLinkedSetIndirect $this */
+			$oRemoteAttDef = MetaModel::GetAttributeDef($this->GetLinkedClass(), $this->GetExtKeyToRemote());
+			$sTargetClass = $oRemoteAttDef->GetTargetClass();
+
+			/** @var \AttributeLinkedSetIndirect $this */
+			$oFormField->SetExtKeyToRemote($this->GetExtKeyToRemote());
+		}
+		$oFormField->SetTargetClass($sTargetClass);
+		$oFormField->SetIndirect($this->IsIndirect());
+		// Setting attcodes to display
+		$aAttCodesToDisplay = MetaModel::FlattenZList(MetaModel::GetZListItems($sTargetClass, 'list'));
+		// - Adding friendlyname attribute to the list is not already in it
+		$sTitleAttCode = MetaModel::GetFriendlyNameAttributeCode($sTargetClass);
+		if (($sTitleAttCode !== null) && !in_array($sTitleAttCode, $aAttCodesToDisplay))
+		{
+			$aAttCodesToDisplay = array_merge(array($sTitleAttCode), $aAttCodesToDisplay);
+		}
+		// - Adding attribute labels
+		$aAttributesToDisplay = array();
+		foreach ($aAttCodesToDisplay as $sAttCodeToDisplay)
+		{
+			$oAttDefToDisplay = MetaModel::GetAttributeDef($sTargetClass, $sAttCodeToDisplay);
+			$aAttributesToDisplay[$sAttCodeToDisplay] = $oAttDefToDisplay->GetLabel();
+		}
+		$oFormField->SetAttributesToDisplay($aAttributesToDisplay);
+		
+		parent::MakeFormField($oObject, $oFormField);
+		
+		return $oFormField;
+	}
+
+	public function IsPartOfFingerprint() { return false; }
+}
+
+/**
+ * Set of objects linked to an object (n-n), and being part of its definition  
+ *
+ * @package	 iTopORM
+ */
+class AttributeLinkedSetIndirect extends AttributeLinkedSet
+{
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("ext_key_to_remote"));
+	}
+
+	public function IsIndirect()
+	{
+		return true;
+	}
+
+	public function GetExtKeyToRemote() { return $this->Get('ext_key_to_remote'); }
+	public function GetEditClass() {return "LinkedSet";}
+	public function DuplicatesAllowed() {return $this->GetOptional("duplicates", false);} // The same object may be linked several times... or not...
+
+	public function GetTrackingLevel()
+	{
+		return $this->GetOptional('tracking_level', MetaModel::GetConfig()->Get('tracking_level_linked_set_indirect_default'));
+	}
+
+	/**
+	 * Find the corresponding "link" attribute on the target class, if any
+	 * @return null | AttributeDefinition
+	 * @throws \CoreException
+	 */
+	public function GetMirrorLinkAttribute()
+	{
+		$oRet = null;
+		/** @var \AttributeExternalKey $oExtKeyToRemote */
+		$oExtKeyToRemote = MetaModel::GetAttributeDef($this->GetLinkedClass(), $this->GetExtKeyToRemote());
+		$sRemoteClass = $oExtKeyToRemote->GetTargetClass();
+		foreach (MetaModel::ListAttributeDefs($sRemoteClass) as $sRemoteAttCode => $oRemoteAttDef)
+		{
+			if (!$oRemoteAttDef instanceof AttributeLinkedSetIndirect) continue;
+			if ($oRemoteAttDef->GetLinkedClass() != $this->GetLinkedClass()) continue;
+			if ($oRemoteAttDef->GetExtKeyToMe() != $this->GetExtKeyToRemote()) continue;
+			if ($oRemoteAttDef->GetExtKeyToRemote() != $this->GetExtKeyToMe()) continue;
+			$oRet = $oRemoteAttDef;
+			break;
+		}
+		return $oRet;
+	}
+}
+
+/**
+ * Abstract class implementing default filters for a DB column  
+ *
+ * @package	 iTopORM
+ */
+class AttributeDBFieldVoid extends AttributeDefinition
+{	
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("allowed_values", "depends_on", "sql"));
+	}
+
+	// To be overriden, used in GetSQLColumns
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return 'VARCHAR(255)'
+			.CMDBSource::GetSqlStringColumnDefinition()
+			.($bFullSpec ? $this->GetSQLColSpec() : '');
+	}
+	protected function GetSQLColSpec()
+	{
+		$default = $this->ScalarToSQL($this->GetDefaultValue());
+		if (is_null($default))
+		{
+			$sRet = '';
+		}
+		else
+		{
+			if (is_numeric($default))
+			{
+				// Though it is a string in PHP, it will be considered as a numeric value in MySQL
+				// Then it must not be quoted here, to preserve the compatibility with the value returned by CMDBSource::GetFieldSpec
+				$sRet = " DEFAULT $default";
+			}
+			else
+			{
+				$sRet = " DEFAULT ".CMDBSource::Quote($default);
+			}
+		}
+		return $sRet;
+	}
+
+	public function GetEditClass() {return "String";}
+	
+	public function GetValuesDef() {return $this->Get("allowed_values");} 
+	public function GetPrerequisiteAttributes($sClass = null) {return $this->Get("depends_on");}
+
+	static public function IsBasedOnDBColumns() {return true;}
+	static public function IsScalar() {return true;}
+	public function IsWritable() {return !$this->IsMagic();}
+	public function GetSQLExpr()
+	{
+		return $this->Get("sql");
+	}
+
+	public function GetDefaultValue(DBObject $oHostObject = null) {return $this->MakeRealValue("", $oHostObject);}
+	public function IsNullAllowed() {return false;}
+
+	// 
+	protected function ScalarToSQL($value) {return $value;} // format value as a valuable SQL literal (quoted outside)
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		$aColumns = array();
+		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
+		$aColumns[''] = $this->Get("sql");
+		return $aColumns;
+	}
+
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		$value = $this->MakeRealValue($aCols[$sPrefix.''], null);
+		return $value;
+	}
+	public function GetSQLValues($value)
+	{
+		$aValues = array();
+		$aValues[$this->Get("sql")] = $this->ScalarToSQL($value);
+		return $aValues;
+	}
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->Get("sql")] = $this->GetSQLCol($bFullSpec);
+		return $aColumns;
+	}
+
+	public function GetFilterDefinitions()
+	{
+		return array($this->GetCode() => new FilterFromAttribute($this));
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array("="=>"equals", "!="=>"differs from");
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return "=";
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		$sQValue = CMDBSource::Quote($value);
+		switch ($sOpCode)
+		{
+		case '!=':
+			return $this->GetSQLExpr()." != $sQValue";
+			break;
+		case '=':
+		default:
+			return $this->GetSQLExpr()." = $sQValue";
+		}
+	} 
+}
+
+/**
+ * Base class for all kind of DB attributes, with the exception of external keys 
+ *
+ * @package	 iTopORM
+ */
+class AttributeDBField extends AttributeDBFieldVoid
+{	
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("default_value", "is_null_allowed"));
+	}
+	public function GetDefaultValue(DBObject $oHostObject = null) {return $this->MakeRealValue($this->Get("default_value"), $oHostObject);}
+	public function IsNullAllowed() {return $this->Get("is_null_allowed");}
+}
+
+/**
+ * Map an integer column to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeInteger extends AttributeDBField
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_NUMERIC;
+
+	static public function ListExpectedParams()
+	{
+		return parent::ListExpectedParams();
+		//return array_merge(parent::ListExpectedParams(), array());
+	}
+
+	public function GetEditClass() {return "String";}
+	protected function GetSQLCol($bFullSpec = false) {return "INT(11)".($bFullSpec ? $this->GetSQLColSpec() : '');}
+	
+	public function GetValidationPattern()
+	{
+		return "^[0-9]+$";
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array(
+			"!="=>"differs from",
+			"="=>"equals",
+			">"=>"greater (strict) than",
+			">="=>"greater than",
+			"<"=>"less (strict) than",
+			"<="=>"less than",
+			"in"=>"in"
+		);
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		// Unless we implement an "equals approximately..." or "same order of magnitude"
+		return "=";
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		$sQValue = CMDBSource::Quote($value);
+		switch ($sOpCode)
+		{
+		case '!=':
+			return $this->GetSQLExpr()." != $sQValue";
+			break;
+		case '>':
+			return $this->GetSQLExpr()." > $sQValue";
+			break;
+		case '>=':
+			return $this->GetSQLExpr()." >= $sQValue";
+			break;
+		case '<':
+			return $this->GetSQLExpr()." < $sQValue";
+			break;
+		case '<=':
+			return $this->GetSQLExpr()." <= $sQValue";
+			break;
+		case 'in':
+			if (!is_array($value)) throw new CoreException("Expected an array for argument value (sOpCode='$sOpCode')");
+			return $this->GetSQLExpr()." IN ('".implode("', '", $value)."')"; 
+			break;
+
+		case '=':
+		default:
+			return $this->GetSQLExpr()." = \"$value\"";
+		}
+	} 
+
+	public function GetNullValue()
+	{
+		return null;
+	} 
+	public function IsNull($proposedValue)
+	{
+		return is_null($proposedValue);
+	} 
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return null;
+		if ($proposedValue === '') return null; // 0 is transformed into '' !
+		return (int)$proposedValue;
+	}
+
+	public function ScalarToSQL($value)
+	{
+		assert(is_numeric($value) || is_null($value));
+		return $value; // supposed to be an int
+	}
+}
+
+/**
+ * An external key for which the class is defined as the value of another attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeObjectKey extends AttributeDBFieldVoid
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_EXTERNAL_KEY;
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array('class_attcode', 'is_null_allowed'));
+	}
+
+	public function GetEditClass() {return "String";}
+	protected function GetSQLCol($bFullSpec = false) {return "INT(11)".($bFullSpec ? " DEFAULT 0" : "");}
+
+	public function GetDefaultValue(DBObject $oHostObject = null) {return 0;}
+	public function IsNullAllowed()
+	{
+		return $this->Get("is_null_allowed");
+	}
+
+
+	public function GetBasicFilterOperators()
+	{
+		return parent::GetBasicFilterOperators();
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return parent::GetBasicFilterLooseOperator();
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		return parent::GetBasicFilterSQLExpr($sOpCode, $value);
+	} 
+
+	public function GetNullValue()
+	{
+		return 0;
+	} 
+
+	public function IsNull($proposedValue)
+	{
+		return ($proposedValue == 0);
+	} 
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return 0;
+		if ($proposedValue === '') return 0;
+		if (MetaModel::IsValidObject($proposedValue)) {
+			/** @var \DBObject $proposedValue */
+			return $proposedValue->GetKey();
+		}
+		return (int)$proposedValue;
+	}
+}
+
+/**
+ * Display an integer between 0 and 100 as a percentage / horizontal bar graph 
+ *
+ * @package	 iTopORM
+ */
+class AttributePercentage extends AttributeInteger
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_NUMERIC;
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		$iWidth = 5; // Total width of the percentage bar graph, in em...
+		$iValue = (int)$sValue;
+		if ($iValue > 100)
+		{
+			$iValue = 100;
+		}
+		else if ($iValue < 0)
+		{
+			$iValue = 0;
+		}
+		if ($iValue > 90)
+		{
+			$sColor = "#cc3300";
+		}
+		else if ($iValue > 50)
+		{
+			$sColor = "#cccc00";
+		}
+		else
+		{
+			$sColor = "#33cc00";
+		}
+		$iPercentWidth = ($iWidth * $iValue) / 100;
+		return "<div style=\"width:{$iWidth}em;-moz-border-radius: 3px;-webkit-border-radius: 3px;border-radius: 3px;display:inline-block;border: 1px #ccc solid;\"><div style=\"width:{$iPercentWidth}em; display:inline-block;background-color:$sColor;\">&nbsp;</div></div>&nbsp;$sValue %";
+	}
+}
+
+/**
+ * Map a decimal value column (suitable for financial computations) to an attribute
+ * internally in PHP such numbers are represented as string. Should you want to perform
+ * a calculation on them, it is recommended to use the BC Math functions in order to
+ * retain the precision
+ *
+ * @package	 iTopORM
+ */
+class AttributeDecimal extends AttributeDBField
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_NUMERIC;
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array('digits', 'decimals' /* including precision */));
+	}
+
+	public function GetEditClass() {return "String";}
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return "DECIMAL(".$this->Get('digits').",".$this->Get('decimals').")".($bFullSpec ? $this->GetSQLColSpec() : '');
+	}
+	
+	public function GetValidationPattern()
+	{
+		$iNbDigits = $this->Get('digits');
+		$iPrecision = $this->Get('decimals');
+		$iNbIntegerDigits = $iNbDigits - $iPrecision - 1; // -1 because the first digit is treated separately in the pattern below
+		return "^[-+]?[0-9]\d{0,$iNbIntegerDigits}(\.\d{0,$iPrecision})?$";
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array(
+			"!="=>"differs from",
+			"="=>"equals",
+			">"=>"greater (strict) than",
+			">="=>"greater than",
+			"<"=>"less (strict) than",
+			"<="=>"less than",
+			"in"=>"in"
+		);
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		// Unless we implement an "equals approximately..." or "same order of magnitude"
+		return "=";
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		$sQValue = CMDBSource::Quote($value);
+		switch ($sOpCode)
+		{
+		case '!=':
+			return $this->GetSQLExpr()." != $sQValue";
+			break;
+		case '>':
+			return $this->GetSQLExpr()." > $sQValue";
+			break;
+		case '>=':
+			return $this->GetSQLExpr()." >= $sQValue";
+			break;
+		case '<':
+			return $this->GetSQLExpr()." < $sQValue";
+			break;
+		case '<=':
+			return $this->GetSQLExpr()." <= $sQValue";
+			break;
+		case 'in':
+			if (!is_array($value)) throw new CoreException("Expected an array for argument value (sOpCode='$sOpCode')");
+			return $this->GetSQLExpr()." IN ('".implode("', '", $value)."')"; 
+			break;
+
+		case '=':
+		default:
+			return $this->GetSQLExpr()." = \"$value\"";
+		}
+	} 
+
+	public function GetNullValue()
+	{
+		return null;
+	} 
+	public function IsNull($proposedValue)
+	{
+		return is_null($proposedValue);
+	} 
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return null;
+		if ($proposedValue === '') return null;
+		return (string)$proposedValue;
+	}
+
+	public function ScalarToSQL($value)
+	{
+		assert(is_null($value) || preg_match('/'.$this->GetValidationPattern().'/', $value));
+		return $value; // null or string
+	}
+}
+
+/**
+ * Map a boolean column to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeBoolean extends AttributeInteger
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static public function ListExpectedParams()
+	{
+		return parent::ListExpectedParams();
+		//return array_merge(parent::ListExpectedParams(), array());
+	}
+
+	public function GetEditClass() {return "Integer";}
+	protected function GetSQLCol($bFullSpec = false) {return "TINYINT(1)".($bFullSpec ? $this->GetSQLColSpec() : '');}
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return null;
+		if ($proposedValue === '') return null;
+		if ((int)$proposedValue) return true;
+		return false;
+	}
+
+	public function ScalarToSQL($value)
+	{
+		if ($value) return 1;
+		return 0;
+	}
+
+	public function GetValueLabel($bValue)
+	{
+		if (is_null($bValue))
+		{
+			$sLabel = Dict::S('Core:'.get_class($this).'/Value:null');
+		}
+		else
+		{
+			$sValue = $bValue ? 'yes' : 'no';
+			$sDefault = Dict::S('Core:'.get_class($this).'/Value:'.$sValue);
+			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/Value:'.$sValue, $sDefault, true /*user lang*/);
+		}
+		return $sLabel;
+	}
+
+	public function GetValueDescription($bValue)
+	{
+		if (is_null($bValue))
+		{
+			$sDescription = Dict::S('Core:'.get_class($this).'/Value:null+');
+		}
+		else
+		{
+			$sValue = $bValue ? 'yes' : 'no';
+			$sDefault = Dict::S('Core:'.get_class($this).'/Value:'.$sValue.'+');
+			$sDescription = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/Value:'.$sValue.'+', $sDefault, true /*user lang*/);
+		}
+		return $sDescription;
+	}
+
+	public function GetAsHTML($bValue, $oHostObject = null, $bLocalize = true)
+	{
+		if (is_null($bValue))
+		{
+			$sRes = '';
+		}
+		elseif ($bLocalize)
+		{
+			$sLabel = $this->GetValueLabel($bValue);
+			$sDescription = $this->GetValueDescription($bValue);
+			// later, we could imagine a detailed description in the title
+			$sRes = "<span title=\"$sDescription\">".parent::GetAsHtml($sLabel)."</span>";
+		}
+		else
+		{
+			$sRes = $bValue ? 'yes' : 'no';
+		}
+		return $sRes;
+	}
+
+	public function GetAsXML($bValue, $oHostObject = null, $bLocalize = true)
+	{
+		if (is_null($bValue))
+		{
+			$sFinalValue = '';
+		}
+		elseif ($bLocalize)
+		{
+			$sFinalValue = $this->GetValueLabel($bValue);
+		}
+		else
+		{
+			$sFinalValue = $bValue ? 'yes' : 'no';
+		}
+		$sRes = parent::GetAsXML($sFinalValue, $oHostObject, $bLocalize);
+		return $sRes;
+	}
+
+	public function GetAsCSV($bValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		if (is_null($bValue))
+		{
+			$sFinalValue = '';
+		}
+		elseif ($bLocalize)
+		{
+			$sFinalValue = $this->GetValueLabel($bValue);
+		}
+		else
+		{
+			$sFinalValue = $bValue ? 'yes' : 'no';
+		}
+		$sRes = parent::GetAsCSV($sFinalValue, $sSeparator, $sTextQualifier, $oHostObject, $bLocalize);
+		return $sRes;
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\SelectField';
+	}
+
+	/**
+	 * @param \DBObject $oObject
+	 * @param \Combodo\iTop\Form\Field\SelectField $oFormField
+	 *
+	 * @return \Combodo\iTop\Form\Field\SelectField
+	 * @throws \CoreException
+	 */
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+
+		$oFormField->SetChoices(array('yes' => $this->GetValueLabel(true), 'no' => $this->GetValueLabel(false)));
+		parent::MakeFormField($oObject, $oFormField);
+
+		return $oFormField;
+	}
+
+	public function GetEditValue($value, $oHostObj = null)
+	{
+		if (is_null($value))
+		{
+			return '';
+		}
+		else
+		{
+			return $this->GetValueLabel($value);
+		}
+	}
+
+	/**
+	 * Helper to get a value that will be JSON encoded
+	 * The operation is the opposite to FromJSONToValue
+	 *
+	 * @param $value
+	 *
+	 * @return bool
+	 */
+	public function GetForJSON($value)
+	{
+		return (bool)$value;
+	}
+
+	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
+	{
+		$sInput = strtolower(trim($sProposedValue));
+		if ($bLocalizedValue)
+		{
+			switch ($sInput)
+			{
+				case '1': // backward compatibility
+				case $this->GetValueLabel(true):
+					$value = true;
+					break;
+				case '0': // backward compatibility
+				case 'no':
+				case $this->GetValueLabel(false):
+					$value = false;
+					break;
+				default:
+					$value = null;
+			}
+		}
+		else
+		{
+			switch ($sInput)
+			{
+				case '1': // backward compatibility
+				case 'yes':
+					$value = true;
+					break;
+				case '0': // backward compatibility
+				case 'no':
+					$value = false;
+					break;
+				default:
+					$value = null;
+			}
+		}
+		return $value;
+	}
+}
+
+/**
+ * Map a varchar column (size < ?) to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeString extends AttributeDBField
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+
+	static public function ListExpectedParams()
+	{
+		return parent::ListExpectedParams();
+		//return array_merge(parent::ListExpectedParams(), array());
+	}
+
+	public function GetEditClass() {return "String";}
+
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return 'VARCHAR(255)'
+			.CMDBSource::GetSqlStringColumnDefinition()
+			.($bFullSpec ? $this->GetSQLColSpec() : '');
+	}
+
+	public function GetValidationPattern()
+	{
+		$sPattern = $this->GetOptional('validation_pattern', '');
+		if (empty($sPattern))
+		{
+			return parent::GetValidationPattern();
+		}
+		else
+		{
+			return $sPattern;
+		}
+	}
+
+	public function CheckFormat($value)
+	{
+		$sRegExp = $this->GetValidationPattern();
+		if (empty($sRegExp))
+		{
+			return true;
+		}
+		else
+		{
+			$sRegExp = str_replace('/', '\\/', $sRegExp);
+			return preg_match("/$sRegExp/", $value);
+		}
+	}
+
+	public function GetMaxSize()
+	{
+		return 255;
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array(
+			"="=>"equals",
+			"!="=>"differs from",
+			"Like"=>"equals (no case)",
+			"NotLike"=>"differs from (no case)",
+			"Contains"=>"contains",
+			"Begins with"=>"begins with",
+			"Finishes with"=>"finishes with"
+		);
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return "Contains";
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		$sQValue = CMDBSource::Quote($value);
+		switch ($sOpCode)
+		{
+		case '=':
+		case '!=':
+			return $this->GetSQLExpr()." $sOpCode $sQValue";
+		case 'Begins with':
+			return $this->GetSQLExpr()." LIKE ".CMDBSource::Quote("$value%");
+		case 'Finishes with':
+			return $this->GetSQLExpr()." LIKE ".CMDBSource::Quote("%$value");
+		case 'Contains':
+			return $this->GetSQLExpr()." LIKE ".CMDBSource::Quote("%$value%");
+		case 'NotLike':
+			return $this->GetSQLExpr()." NOT LIKE $sQValue";
+		case 'Like':
+		default:
+			return $this->GetSQLExpr()." LIKE $sQValue";
+		}
+	} 
+
+	public function GetNullValue()
+	{
+		return '';
+	} 
+
+	public function IsNull($proposedValue)
+	{
+		return ($proposedValue == '');
+	} 
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return '';
+		return (string)$proposedValue;
+	}
+
+	public function ScalarToSQL($value)
+	{
+		if (!is_string($value) && !is_null($value))
+		{
+			throw new CoreWarning('Expected the attribute value to be a string', array('found_type' => gettype($value), 'value' => $value, 'class' => $this->GetHostClass(), 'attribute' => $this->GetCode()));
+		}
+		return $value;
+	}
+
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		$sFrom = array("\r\n", $sTextQualifier);
+		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
+		$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
+		return $sTextQualifier.$sEscaped.$sTextQualifier;
+	}
+
+	public function GetDisplayStyle()
+	{
+		return $this->GetOptional('display_style', 'select');
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\StringField';
+	}
+
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+		parent::MakeFormField($oObject, $oFormField);
+
+		return $oFormField;
+	}
+
+}
+
+/**
+ * An attibute that matches an object class 
+ *
+ * @package	 iTopORM
+ */
+class AttributeClass extends AttributeString
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_ENUM;
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("class_category", "more_values"));
+	}
+
+	public function __construct($sCode, $aParams)
+	{
+		$this->m_sCode = $sCode;
+		$aParams["allowed_values"] = new ValueSetEnumClasses($aParams['class_category'], $aParams['more_values']);
+		parent::__construct($sCode, $aParams);
+	}
+
+	public function GetDefaultValue(DBObject $oHostObject = null)
+	{
+		$sDefault = parent::GetDefaultValue($oHostObject);
+		if (!$this->IsNullAllowed() && $this->IsNull($sDefault))
+		{
+			// For this kind of attribute specifying null as default value
+			// is authorized even if null is not allowed
+			
+			// Pick the first one...
+			$aClasses = $this->GetAllowedValues();
+			$sDefault = key($aClasses);
+		}
+		return $sDefault;
+	}
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		if (empty($sValue)) return '';
+		return MetaModel::GetName($sValue);
+	}
+
+	public function RequiresIndex()
+	{
+		return true;
+	}
+	
+	public function GetBasicFilterLooseOperator()
+	{
+		return '=';
+	}
+	
+}
+
+/**
+ * An attibute that matches one of the language codes availables in the dictionnary 
+ *
+ * @package	 iTopORM
+ */
+class AttributeApplicationLanguage extends AttributeString
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+
+	static public function ListExpectedParams()
+	{
+		return parent::ListExpectedParams();
+	}
+
+	public function __construct($sCode, $aParams)
+	{
+		$this->m_sCode = $sCode;
+		$aAvailableLanguages = Dict::GetLanguages();
+		$aLanguageCodes = array();
+		foreach($aAvailableLanguages as $sLangCode => $aInfo)
+		{
+			$aLanguageCodes[$sLangCode] = $aInfo['description'].' ('.$aInfo['localized_description'].')';
+		}
+		$aParams["allowed_values"] = new ValueSetEnum($aLanguageCodes);
+		parent::__construct($sCode, $aParams);
+	}
+
+	public function RequiresIndex()
+	{
+		return true;
+	}
+	
+	public function GetBasicFilterLooseOperator()
+	{
+		return '=';
+	}
+}
+
+/**
+ * The attribute dedicated to the finalclass automatic attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeFinalClass extends AttributeString
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+	public $m_sValue;
+
+	public function __construct($sCode, $aParams)
+	{
+		$this->m_sCode = $sCode;
+		$aParams["allowed_values"] = null;
+		parent::__construct($sCode, $aParams);
+
+		$this->m_sValue = $this->Get("default_value");
+	}
+
+	public function IsWritable()
+	{
+		return false;
+	}
+	public function IsMagic()
+	{
+		return true;
+	}
+
+	public function RequiresIndex()
+	{
+		return true;
+	}
+
+	public function SetFixedValue($sValue)
+	{
+		$this->m_sValue = $sValue;
+	}
+	public function GetDefaultValue(DBObject $oHostObject = null)
+	{
+		return $this->m_sValue;
+	}
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		if (empty($sValue)) return '';
+		if ($bLocalize)
+		{
+			return MetaModel::GetName($sValue);
+		}
+		else
+		{
+			return $sValue;
+		}
+	}
+
+	/**
+	 * An enum can be localized
+	 *
+	 * @param string $sProposedValue
+	 * @param bool $bLocalizedValue
+	 * @param string $sSepItem
+	 * @param string $sSepAttribute
+	 * @param string $sSepValue
+	 * @param string $sAttributeQualifier
+	 *
+	 * @return mixed|null|string
+	 * @throws \CoreException
+	 * @throws \OQLException
+	 */
+	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
+	{
+		if ($bLocalizedValue)
+		{
+			// Lookup for the value matching the input
+			//
+			$sFoundValue = null;
+			$aRawValues = self::GetAllowedValues();
+			if (!is_null($aRawValues))
+			{
+				foreach ($aRawValues as $sKey => $sValue)
+				{
+					if ($sProposedValue == $sValue)
+					{
+						$sFoundValue = $sKey;
+						break;
+					}
+				}
+			}
+			if (is_null($sFoundValue))
+			{
+				return null;
+			}
+			return $this->MakeRealValue($sFoundValue, null);
+		}
+		else
+		{
+			return parent::MakeValueFromString($sProposedValue, $bLocalizedValue, $sSepItem, $sSepAttribute, $sSepValue, $sAttributeQualifier);
+		}
+	}
+
+
+	// Because this is sometimes used to get a localized/string version of an attribute...
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		if (empty($sValue)) return '';
+		return MetaModel::GetName($sValue);
+	}
+
+	/**
+	 * Helper to get a value that will be JSON encoded
+	 * The operation is the opposite to FromJSONToValue
+	 *
+	 * @param $value
+	 *
+	 * @return string
+	 */
+	public function GetForJSON($value)
+	{
+		// JSON values are NOT localized
+		return $value;
+	}
+
+	/**
+	 * @param $value
+	 * @param string $sSeparator
+	 * @param string $sTextQualifier
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 * @param bool $bConvertToPlainText
+	 *
+	 * @return string
+	 * @throws \CoreException
+	 * @throws \DictExceptionMissingString
+	 */
+	public function GetAsCSV(
+		$value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false
+	)
+	{
+		if ($bLocalize && $value != '')
+		{
+			$sRawValue = MetaModel::GetName($value);
+		}
+		else
+		{
+			$sRawValue = $value;
+		}
+		return parent::GetAsCSV($sRawValue, $sSeparator, $sTextQualifier, null, false, $bConvertToPlainText);
+	}
+
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (empty($value)) return '';
+		if ($bLocalize)
+		{
+			$sRawValue = MetaModel::GetName($value);
+		}
+		else
+		{
+			$sRawValue = $value;
+		}
+		return Str::pure2xml($sRawValue);
+	}
+
+	public function GetBasicFilterLooseOperator()
+	{
+		return '=';
+	}
+	
+	public function GetValueLabel($sValue)
+	{
+		if (empty($sValue)) return '';
+		return MetaModel::GetName($sValue);
+	}
+
+	public function GetAllowedValues($aArgs = array(), $sContains = '')
+	{
+		$aRawValues = MetaModel::EnumChildClasses($this->GetHostClass(), ENUM_CHILD_CLASSES_ALL);
+		$aLocalizedValues = array();
+		foreach ($aRawValues as $sClass)
+		{
+			$aLocalizedValues[$sClass] = MetaModel::GetName($sClass);
+		}
+  		return $aLocalizedValues;
+  	}
+}
+
+
+/**
+ * Map a varchar column (size < ?) to an attribute that must never be shown to the user 
+ *
+ * @package	 iTopORM
+ */
+class AttributePassword extends AttributeString
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static public function ListExpectedParams()
+	{
+		return parent::ListExpectedParams();
+		//return array_merge(parent::ListExpectedParams(), array());
+	}
+
+	public function GetEditClass() {return "Password";}
+
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return "VARCHAR(64)"
+			.CMDBSource::GetSqlStringColumnDefinition()
+			.($bFullSpec ? $this->GetSQLColSpec() : '');
+	}
+
+	public function GetMaxSize()
+	{
+		return 64;
+	}
+
+	public function GetFilterDefinitions()
+	{
+	// Note: due to this, you will get an error if a password is being declared as a search criteria (see ZLists)
+		// not allowed to search on passwords!
+		return array();
+	}
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		if (strlen($sValue) == 0)
+		{
+			return '';
+		}
+		else
+		{
+			return '******';
+		}
+	}
+	
+	public function IsPartOfFingerprint() { return false; } // Cannot reliably compare two encrypted passwords since the same password will be encrypted in diffferent manners depending on the random 'salt'
+}
+
+/**
+ * Map a text column (size < 255) to an attribute that is encrypted in the database
+ * The encryption is based on a key set per iTop instance. Thus if you export your
+ * database (in SQL) to someone else without providing the key at the same time
+ * the encrypted fields will remain encrypted
+ *
+ * @package	 iTopORM
+ */
+class AttributeEncryptedString extends AttributeString
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static $sKey = null; // Encryption key used for all encrypted fields
+	static $sLibrary = null; // Encryption library used for all encrypted fields
+	public function __construct($sCode, $aParams)
+	{
+		parent::__construct($sCode, $aParams);
+		if (self::$sKey == null)
+		{
+			self::$sKey = MetaModel::GetConfig()->GetEncryptionKey();
+		}
+		if(self::$sLibrary == null)
+		{
+			self::$sLibrary = MetaModel::GetConfig()->GetEncryptionLibrary();
+		}
+	}
+	/**
+	 * When the attribute definitions are stored in APC cache:
+	 * 1) The static class variable $sKey is NOT serialized
+	 * 2) The object's constructor is NOT called upon wakeup
+	 * 3) mcrypt may crash the server if passed an empty key !!
+	 * 
+	 * So let's restore the key (if needed) when waking up
+	 **/
+	public function __wakeup()
+	{
+		if (self::$sKey == null)
+		{
+			self::$sKey = MetaModel::GetConfig()->GetEncryptionKey();
+		}
+		if(self::$sLibrary == null)
+		{
+			self::$sLibrary = MetaModel::GetConfig()->GetEncryptionLibrary();
+		}
+	}
+	
+
+	protected function GetSQLCol($bFullSpec = false) {return "TINYBLOB";}	
+
+	public function GetMaxSize()
+	{
+		return 255;
+	}
+
+	public function GetFilterDefinitions()
+	{
+		// Note: due to this, you will get an error if a an encrypted field is declared as a search criteria (see ZLists)
+		// not allowed to search on encrypted fields !
+		return array();
+	}
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return null;
+		return (string)$proposedValue;
+	}
+
+	/**
+	 * Decrypt the value when reading from the database
+	 *
+	 * @param array $aCols
+	 * @param string $sPrefix
+	 *
+	 * @return string
+	 * @throws \Exception
+	 */
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+ 		$oSimpleCrypt = new SimpleCrypt(self::$sLibrary);
+ 		$sValue = $oSimpleCrypt->Decrypt(self::$sKey, $aCols[$sPrefix]);
+		return $sValue;
+	}
+
+	/**
+	 * Encrypt the value before storing it in the database
+	 *
+	 * @param $value
+	 *
+	 * @return array
+	 * @throws \Exception
+	 */
+	public function GetSQLValues($value)
+	{
+ 		$oSimpleCrypt = new SimpleCrypt(self::$sLibrary);
+ 		$encryptedValue = $oSimpleCrypt->Encrypt(self::$sKey, $value);
+
+		$aValues = array();
+		$aValues[$this->Get("sql")] = $encryptedValue;
+		return $aValues;
+	}
+}
+
+
+// Wiki formatting - experimental
+//
+// [[<objClass>:<objName>]]
+// Example: [[Server:db1.tnut.com]]
+define('WIKI_OBJECT_REGEXP', '/\[\[(.+):(.+)\]\]/U');
+
+
+/**
+ * Map a text column (size > ?) to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeText extends AttributeString
+{
+	public function GetEditClass() {return ($this->GetFormat() == 'text') ? 'Text' : "HTML";}
+
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return "TEXT".CMDBSource::GetSqlStringColumnDefinition();
+	}
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->Get('sql')] = $this->GetSQLCol($bFullSpec);
+		if ($this->GetOptional('format', null) != null )
+		{
+			// Add the extra column only if the property 'format' is specified for the attribute
+			$aColumns[$this->Get('sql').'_format'] = "ENUM('text','html')".CMDBSource::GetSqlStringColumnDefinition();
+			if ($bFullSpec)
+			{
+				$aColumns[$this->Get('sql').'_format'].= " DEFAULT 'text'"; // default 'text' is for migrating old records
+			}
+		}
+		return $aColumns;
+	}
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		if ($sPrefix == '')
+		{
+			$sPrefix = $this->Get('sql');
+		}
+		$aColumns = array();
+		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
+		$aColumns[''] = $sPrefix;
+		if ($this->GetOptional('format', null) != null )
+		{
+			// Add the extra column only if the property 'format' is specified for the attribute
+			$aColumns['_format'] = $sPrefix.'_format';
+		}
+		return $aColumns;
+	}
+	
+	public function GetMaxSize()
+	{
+		// Is there a way to know the current limitation for mysql?
+		// See mysql_field_len()
+		return 65535;
+	}
+
+	static public function RenderWikiHtml($sText, $bWikiOnly = false)
+	{
+		if (!$bWikiOnly)
+		{
+			$sPattern = '/'.str_replace('/', '\/', utils::GetConfig()->Get('url_validation_pattern')).'/i';
+			if (preg_match_all($sPattern, $sText, $aAllMatches, PREG_SET_ORDER /* important !*/ |PREG_OFFSET_CAPTURE /* important ! */))
+			{
+				$i = count($aAllMatches);
+				// Replace the URLs by an actual hyperlink <a href="...">...</a>
+				// Let's do it backwards so that the initial positions are not modified by the replacement
+				// This works if the matches are captured: in the order they occur in the string  AND
+				// with their offset (i.e. position) inside the string
+				while($i > 0)
+				{
+					$i--;
+					$sUrl = $aAllMatches[$i][0][0]; // String corresponding to the main pattern
+					$iPos = $aAllMatches[$i][0][1]; // Position of the main pattern
+					$sText = substr_replace($sText, "<a href=\"$sUrl\">$sUrl</a>", $iPos, strlen($sUrl));
+					
+				}
+			}
+		}
+		if (preg_match_all(WIKI_OBJECT_REGEXP, $sText, $aAllMatches, PREG_SET_ORDER))
+		{
+			foreach($aAllMatches as $iPos => $aMatches)
+			{
+				$sClass = trim($aMatches[1]);
+				$sName = trim($aMatches[2]);
+				
+				if (MetaModel::IsValidClass($sClass))
+				{
+					$oObj = MetaModel::GetObjectByName($sClass, $sName, false /* MustBeFound */);
+					if (is_object($oObj))
+					{
+						// Propose a std link to the object
+						$sText = str_replace($aMatches[0], $oObj->GetHyperlink(), $sText);
+					}
+					else
+					{
+						// Propose a std link to the object
+						$sClassLabel = MetaModel::GetName($sClass);
+						$sText = str_replace($aMatches[0], "<span class=\"wiki_broken_link\">$sClassLabel:$sName</span>", $sText);
+						// Later: propose a link to create a new object
+						// Anyhow... there is no easy way to suggest default values based on the given FRIENDLY name
+						//$sText = preg_replace('/\[\[(.+):(.+)\]\]/', '<a href="'.utils::GetAbsoluteUrlAppRoot().'pages/UI.php?operation=new&class='.$sClass.'&default[att1]=xxx&default[att2]=yyy">'.$sName.'</a>', $sText);
+					}
+				}
+			}
+		}
+		return $sText;
+	}
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		$aStyles = array();
+		if ($this->GetWidth() != '')
+		{
+			$aStyles[] = 'width:'.$this->GetWidth();
+		}
+		if ($this->GetHeight() != '')
+		{
+			$aStyles[] = 'height:'.$this->GetHeight();
+		}
+		$sStyle = '';
+		if (count($aStyles) > 0)
+		{
+			$aStyles[] = 'overflow:auto';
+			$sStyle = 'style="'.implode(';', $aStyles).'"';
+		}
+		
+		if ($this->GetFormat() == 'text')
+		{
+			$sValue = parent::GetAsHTML($sValue, $oHostObject, $bLocalize);
+			$sValue = self::RenderWikiHtml($sValue);
+			return "<div $sStyle>".str_replace("\n", "<br>\n", $sValue).'</div>';			
+		}
+		else
+		{
+			$sValue = self::RenderWikiHtml($sValue, true /* wiki only */);
+			return "<div class=\"HTML\" $sStyle>".InlineImage::FixUrls($sValue).'</div>';
+		}
+		
+	}
+
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		if ($this->GetFormat() == 'text')
+		{
+			if (preg_match_all(WIKI_OBJECT_REGEXP, $sValue, $aAllMatches, PREG_SET_ORDER))
+			{
+				foreach($aAllMatches as $iPos => $aMatches)
+				{
+					$sClass = $aMatches[1];
+					$sName = $aMatches[2];
+
+					if (MetaModel::IsValidClass($sClass))
+					{
+						$sClassLabel = MetaModel::GetName($sClass);
+						$sValue = str_replace($aMatches[0], "[[$sClassLabel:$sName]]", $sValue);
+					}
+				}
+			}
+		}
+		else
+		{
+			$sValue = str_replace('&', '&amp;', $sValue);
+		}
+		return $sValue;
+	}
+
+	/**
+	 * For fields containing a potential markup, return the value without this markup
+	 *
+	 * @param string $sValue
+	 * @param \DBObject $oHostObj
+	 *
+	 * @return string
+	 */
+	public function GetAsPlainText($sValue, $oHostObj = null)
+	{
+		if ($this->GetFormat() == 'html')
+		{
+			return (string) utils::HtmlToText($this->GetEditValue($sValue, $oHostObj));
+		}
+		else
+		{
+			return parent::GetAsPlainText($sValue, $oHostObj);
+		}
+	}
+	
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		$sValue = $proposedValue;
+		switch ($this->GetFormat())
+		{
+			case 'html':
+			if (($sValue !== null) && ($sValue !== ''))
+			{
+				$sValue = HTMLSanitizer::Sanitize($sValue);
+			}
+			break;
+			
+			case 'text':
+			default:
+			if (preg_match_all(WIKI_OBJECT_REGEXP, $sValue, $aAllMatches, PREG_SET_ORDER))
+			{
+				foreach($aAllMatches as $iPos => $aMatches)
+				{
+					$sClassLabel = $aMatches[1];
+					$sName = $aMatches[2];
+
+					if (!MetaModel::IsValidClass($sClassLabel))
+					{
+						$sClass = MetaModel::GetClassFromLabel($sClassLabel);
+						if ($sClass)
+						{
+							$sValue = str_replace($aMatches[0], "[[$sClass:$sName]]", $sValue);
+						}
+					}
+				}
+			}
+		}
+		return $sValue;
+	}
+
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		return Str::pure2xml($value);
+	}
+	
+	public function GetWidth()
+	{
+		return $this->GetOptional('width', '');		
+	}
+	
+	public function GetHeight()
+	{
+		return $this->GetOptional('height', '');		
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\TextAreaField';
+	}
+
+	/**
+	 * @param \DBObject $oObject
+	 * @param \Combodo\iTop\Form\Field\TextAreaField $oFormField
+	 *
+	 * @return \Combodo\iTop\Form\Field\TextAreaField
+	 * @throws \CoreException
+	 */
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			/** @var \Combodo\iTop\Form\Field\TextAreaField $oFormField */
+			$oFormField = new $sFormFieldClass($this->GetCode(), null, $oObject);
+			$oFormField->SetFormat($this->GetFormat());
+		}
+		parent::MakeFormField($oObject, $oFormField);
+
+		return $oFormField;
+	}
+
+	/**
+	 * The actual formatting of the field: either text (=plain text) or html (= text with HTML markup)
+	 * @return string
+	 */
+	public function GetFormat()
+	{
+		return $this->GetOptional('format', 'text');
+	}
+
+	/**
+	 * Read the value from the row returned by the SQL query and transorms it to the appropriate
+	 * internal format (either text or html)
+	 *
+	 * @see AttributeDBFieldVoid::FromSQLToValue()
+	 *
+	 * @param array $aCols
+	 * @param string $sPrefix
+	 *
+	 * @return string
+	 */
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		$value = $aCols[$sPrefix.''];
+		if ($this->GetOptional('format', null) != null )
+		{
+			// Read from the extra column only if the property 'format' is specified for the attribute
+			$sFormat = $aCols[$sPrefix.'_format'];
+		}
+		else
+		{
+			$sFormat = $this->GetFormat();
+		}
+		
+		switch($sFormat)
+		{
+			case 'text':
+			if ($this->GetFormat() == 'html')
+			{
+				$value = utils::TextToHtml($value);
+			}
+			break;
+			
+			case 'html':
+			if ($this->GetFormat() == 'text')
+			{
+				$value = utils::HtmlToText($value);
+			}
+			else
+			{
+				$value = InlineImage::FixUrls((string)$value);
+			}
+			break;
+			
+			default:
+			// unknown format ??
+		}
+		return $value;
+	}
+	
+	public function GetSQLValues($value)
+	{
+		$aValues = array();
+		$aValues[$this->Get("sql")] = $this->ScalarToSQL($value);
+		if ($this->GetOptional('format', null) != null )
+		{
+			// Add the extra column only if the property 'format' is specified for the attribute
+			$aValues[$this->Get("sql").'_format'] = $this->GetFormat();
+		}
+		return $aValues;
+	}	
+	
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		switch($this->GetFormat())
+		{
+			case 'html':
+			if ($bConvertToPlainText)
+			{
+				$sValue = utils::HtmlToText((string)$sValue);
+			}
+			$sFrom = array("\r\n", $sTextQualifier);
+			$sTo = array("\n", $sTextQualifier.$sTextQualifier);
+			$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
+			return $sTextQualifier.$sEscaped.$sTextQualifier;
+			break;
+			
+			case 'text':
+			default:
+			return parent::GetAsCSV($sValue, $sSeparator, $sTextQualifier, $oHostObject, $bLocalize, $bConvertToPlainText);
+		}
+	}
+}
+
+/**
+ * Map a log to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeLongText extends AttributeText
+{
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return "LONGTEXT".CMDBSource::GetSqlStringColumnDefinition();
+	}
+
+	public function GetMaxSize()
+	{
+		// Is there a way to know the current limitation for mysql?
+		// See mysql_field_len()
+		return 65535*1024; // Limited... still 64 Mb!
+	}
+}
+
+/**
+ * An attibute that stores a case log (i.e journal) 
+ *
+ * @package	 iTopORM
+ */
+class AttributeCaseLog extends AttributeLongText
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+
+	public function GetNullValue()
+	{
+		return '';
+	} 
+
+	public function IsNull($proposedValue)
+	{
+		if (!($proposedValue instanceof ormCaseLog))
+		{
+			return ($proposedValue == '');
+		}
+		return ($proposedValue->GetText() == '');
+	} 
+
+	public function ScalarToSQL($value)
+	{
+		if (!is_string($value) && !is_null($value))
+		{
+			throw new CoreWarning('Expected the attribute value to be a string', array('found_type' => gettype($value), 'value' => $value, 'class' => $this->GetCode(), 'attribute' => $this->GetHostClass()));
+		}
+		return $value;
+	}
+	public function GetEditClass() {return "CaseLog";}
+
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		if (!($sValue instanceOf ormCaseLog))
+		{
+			return '';
+		}
+		return $sValue->GetModifiedEntry();
+	}
+
+	/**
+	 * For fields containing a potential markup, return the value without this markup
+	 *
+	 * @param mixed $value
+	 * @param \DBObject $oHostObj
+	 *
+	 * @return string
+	 */
+	public function GetAsPlainText($value, $oHostObj = null)
+	{
+		if ($value instanceOf ormCaseLog)
+		{
+			/** ormCaseLog $value */
+			return $value->GetAsPlainText();
+		}
+		else
+		{
+			return (string) $value;
+		}
+	}
+	
+	public function GetDefaultValue(DBObject $oHostObject = null) {return new ormCaseLog();}
+	public function Equals($val1, $val2) {return ($val1->GetText() == $val2->GetText());}
+
+
+	/**
+	 * Facilitate things: allow the user to Set the value from a string
+	 *
+	 * @param $proposedValue
+	 * @param \DBObject $oHostObj
+	 *
+	 * @return mixed|null|\ormCaseLog|string
+	 * @throws \Exception
+	 */
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if ($proposedValue instanceof ormCaseLog)
+		{
+			// Passthrough
+			$ret = clone $proposedValue;
+		}
+		else
+		{
+			// Append the new value if an instance of the object is supplied
+			//
+			$oPreviousLog = null;
+			if ($oHostObj != null)
+			{
+				$oPreviousLog = $oHostObj->Get($this->GetCode());
+				if (!is_object($oPreviousLog))
+				{
+					$oPreviousLog = $oHostObj->GetOriginal($this->GetCode());;
+				}
+				
+			}
+			if (is_object($oPreviousLog))
+			{
+				$oCaseLog = clone($oPreviousLog);
+			}
+			else
+			{
+				$oCaseLog = new ormCaseLog();
+			}
+
+			if ($proposedValue instanceof stdClass)
+			{
+				$oCaseLog->AddLogEntryFromJSON($proposedValue);
+			}
+			else
+			{
+				if (strlen($proposedValue) > 0)
+				{
+					$oCaseLog->AddLogEntry($proposedValue);
+				}
+			}
+			$ret = $oCaseLog;
+		}
+		return $ret;
+	}
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		if ($sPrefix == '')
+		{
+			$sPrefix = $this->Get('sql');
+		}
+		$aColumns = array();
+		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
+		$aColumns[''] = $sPrefix;
+		$aColumns['_index'] = $sPrefix.'_index';
+		return $aColumns;
+	}
+
+	/**
+	 * @param array $aCols
+	 * @param string $sPrefix
+	 *
+	 * @return \ormCaseLog
+	 * @throws \MissingColumnException
+	 */
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		if (!array_key_exists($sPrefix, $aCols))
+		{
+			$sAvailable = implode(', ', array_keys($aCols));
+			throw new MissingColumnException("Missing column '$sPrefix' from {$sAvailable}");
+		} 
+		$sLog = $aCols[$sPrefix];
+
+		if (isset($aCols[$sPrefix.'_index'])) 
+		{
+			$sIndex = $aCols[$sPrefix.'_index'];
+		}
+		else
+		{
+			// For backward compatibility, allow the current state to be: 1 log, no index
+			$sIndex = '';
+		}
+
+		if (strlen($sIndex) > 0)
+		{ 
+			$aIndex = unserialize($sIndex);
+			$value = new ormCaseLog($sLog, $aIndex);
+		}
+		else
+		{
+			$value = new ormCaseLog($sLog);
+		}
+		return $value;
+	}
+
+	public function GetSQLValues($value)
+	{
+		if (!($value instanceOf ormCaseLog))
+		{
+			$value = new ormCaseLog('');
+		}
+		$aValues = array();
+		$aValues[$this->GetCode()] = $value->GetText();
+		$aValues[$this->GetCode().'_index'] = serialize($value->GetIndex());
+
+		return $aValues;
+	}
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->GetCode()] = 'LONGTEXT' // 2^32 (4 Gb)
+			.CMDBSource::GetSqlStringColumnDefinition();
+		$aColumns[$this->GetCode().'_index'] = 'BLOB';
+		return $aColumns;
+	}
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if ($value instanceOf ormCaseLog)
+		{
+			$sContent = $value->GetAsHTML(null, false, array(__class__, 'RenderWikiHtml'));
+		}
+		else
+		{
+			$sContent = '';
+		}
+		$aStyles = array();
+		if ($this->GetWidth() != '')
+		{
+			$aStyles[] = 'width:'.$this->GetWidth();
+		}
+		if ($this->GetHeight() != '')
+		{
+			$aStyles[] = 'height:'.$this->GetHeight();
+		}
+		$sStyle = '';
+		if (count($aStyles) > 0)
+		{
+			$sStyle = 'style="'.implode(';', $aStyles).'"';
+		}
+		return "<div class=\"caselog\" $sStyle>".$sContent.'</div>';	}
+
+
+	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		if ($value instanceOf ormCaseLog)
+		{
+			return parent::GetAsCSV($value->GetText($bConvertToPlainText), $sSeparator, $sTextQualifier, $oHostObject, $bLocalize, $bConvertToPlainText);
+		}
+		else
+		{
+			return '';
+		}
+	}
+	
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if ($value instanceOf ormCaseLog)
+		{
+			return parent::GetAsXML($value->GetText(), $oHostObject, $bLocalize);
+		}
+		else
+		{
+			return '';
+		}
+	}
+
+	/**
+	 * List the available verbs for 'GetForTemplate'
+	 */	 
+	public function EnumTemplateVerbs()
+	{
+		return array(
+			'' => 'Plain text representation of all the log entries',
+			'head' => 'Plain text representation of the latest entry',
+			'head_html' => 'HTML representation of the latest entry',
+			'html' => 'HTML representation of all the log entries',
+		);
+	}
+
+	/**
+	 * Get various representations of the value, for insertion into a template (e.g. in Notifications)
+	 *
+	 * @param $value mixed The current value of the field
+	 * @param $sVerb string The verb specifying the representation of the value
+	 * @param $oHostObject DBObject The object
+	 * @param $bLocalize bool Whether or not to localize the value
+	 *
+	 * @return mixed
+	 * @throws \Exception
+	 */
+	public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
+	{
+		switch($sVerb)
+		{
+			case '':
+			return $value->GetText(true);
+			
+			case 'head':
+			return $value->GetLatestEntry('text');
+
+			case 'head_html':
+			return $value->GetLatestEntry('html');
+			
+			case 'html':
+			return $value->GetAsEmailHtml();
+	
+			default:
+			throw new Exception("Unknown verb '$sVerb' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
+		}
+	}
+	
+	/**
+	 * Helper to get a value that will be JSON encoded
+	 * The operation is the opposite to FromJSONToValue	 
+	 */	 	
+	public function GetForJSON($value)
+	{
+		return $value->GetForJSON();
+	}
+
+	/**
+	 * Helper to form a value, given JSON decoded data
+	 * The operation is the opposite to GetForJSON	 
+	 */	 	
+	public function FromJSONToValue($json)
+	{
+		if (is_string($json))
+		{
+			// Will be correctly handled in MakeRealValue
+			$ret = $json;
+		}
+		else
+		{
+			if (isset($json->add_item))
+			{
+				// Will be correctly handled in MakeRealValue
+				$ret = $json->add_item;
+				if (!isset($ret->message))
+				{
+					throw new Exception("Missing mandatory entry: 'message'");
+				}
+			}
+			else
+			{
+				$ret = ormCaseLog::FromJSON($json);
+			}
+		}
+		return $ret;
+	}
+	
+	public function Fingerprint($value)
+	{
+		$sFingerprint = '';
+		if ($value instanceOf ormCaseLog)
+		{
+			$sFingerprint = $value->GetText();
+		}
+		return $sFingerprint;
+	}
+	
+	/**
+	 * The actual formatting of the text: either text (=plain text) or html (= text with HTML markup)
+	 * @return string
+	 */
+	public function GetFormat()
+	{
+		return $this->GetOptional('format', 'html'); // default format for case logs is now HTML
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\CaseLogField';
+	}
+
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		// First we call the parent so the field is build
+		$oFormField = parent::MakeFormField($oObject, $oFormField);
+		// Then only we set the value
+		$oFormField->SetCurrentValue($this->GetEditValue($oObject->Get($this->GetCode())));
+		// And we set the entries
+		$oFormField->SetEntries($oObject->Get($this->GetCode())->GetAsArray());
+
+		return $oFormField;
+	}
+}
+
+/**
+ * Map a text column (size > ?), containing HTML code, to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeHTML extends AttributeLongText
+{
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->Get('sql')] = $this->GetSQLCol();
+		if ($this->GetOptional('format', null) != null )
+		{
+			// Add the extra column only if the property 'format' is specified for the attribute
+			$aColumns[$this->Get('sql').'_format'] = "ENUM('text','html')";
+			if ($bFullSpec)
+			{
+				$aColumns[$this->Get('sql').'_format'].= " DEFAULT 'html'"; // default 'html' is for migrating old records
+			}
+		}
+		return $aColumns;
+	}
+
+	/**
+	 * The actual formatting of the text: either text (=plain text) or html (= text with HTML markup)
+	 * @return string
+	 */
+	public function GetFormat()
+	{
+		return $this->GetOptional('format', 'html'); // Defaults to HTML
+	}
+}
+
+/**
+ * Specialization of a string: email 
+ *
+ * @package	 iTopORM
+ */
+class AttributeEmailAddress extends AttributeString
+{
+	public function GetValidationPattern()
+	{
+		return $this->GetOptional('validation_pattern', '^'.utils::GetConfig()->Get('email_validation_pattern').'$');
+	}
+
+    static public function GetFormFieldClass()
+    {
+        return '\\Combodo\\iTop\\Form\\Field\\EmailField';
+    }
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		if (empty($sValue)) return '';
+
+		$sUrlDecorationClass = utils::GetConfig()->Get('email_decoration_class');
+
+		return '<a class="mailto" href="mailto:'.$sValue.'"><span class="text_decoration '.$sUrlDecorationClass.'"></span>'.parent::GetAsHTML($sValue).'</a>';
+	}
+}
+
+/**
+ * Specialization of a string: IP address 
+ *
+ * @package	 iTopORM
+ */
+class AttributeIPAddress extends AttributeString
+{
+	public function GetValidationPattern()
+	{
+		$sNum = '(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])';
+		return "^($sNum\\.$sNum\\.$sNum\\.$sNum)$";
+	}
+
+	public function GetOrderBySQLExpressions($sClassAlias)
+	{
+		// Note: This is the responsibility of this function to place backticks around column aliases
+		return array('INET_ATON(`'.$sClassAlias.$this->GetCode().'`)');
+	}
+}
+
+/**
+ * Specialization of a string: phone number
+ *
+ * @package	 iTopORM
+ */
+class AttributePhoneNumber extends AttributeString
+{
+    public function GetValidationPattern()
+    {
+        return $this->GetOptional('validation_pattern', '^'.utils::GetConfig()->Get('phone_number_validation_pattern').'$');
+    }
+
+    static public function GetFormFieldClass()
+    {
+        return '\\Combodo\\iTop\\Form\\Field\\PhoneField';
+    }
+
+    public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+    {
+        if (empty($sValue)) return '';
+
+        $sUrlDecorationClass = utils::GetConfig()->Get('phone_number_decoration_class');
+        $sUrlPattern = utils::GetConfig()->Get('phone_number_url_pattern');
+        $sUrl = sprintf($sUrlPattern, $sValue);
+
+        return '<a class="tel" href="'.$sUrl.'"><span class="text_decoration '.$sUrlDecorationClass.'"></span>'.parent::GetAsHTML($sValue).'</a>';
+    }
+}
+
+/**
+ * Specialization of a string: OQL expression 
+ *
+ * @package	 iTopORM
+ */
+class AttributeOQL extends AttributeText
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+
+	public function GetEditClass() {return "OQLExpression";}
+}
+
+/**
+ * Specialization of a string: template (contains iTop placeholders like $current_contact_id$ or $this->name$) 
+ *
+ * @package	 iTopORM
+ */
+class AttributeTemplateString extends AttributeString
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+}
+
+/**
+ * Specialization of a text: template (contains iTop placeholders like $current_contact_id$ or $this->name$)
+ *
+ * @package	 iTopORM
+ */
+class AttributeTemplateText extends AttributeText
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+}
+
+/**
+ * Specialization of a HTML: template (contains iTop placeholders like $current_contact_id$ or $this->name$)
+ *
+ * @package	 iTopORM
+ */
+class AttributeTemplateHTML extends AttributeText
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->Get('sql')] = $this->GetSQLCol();
+		if ($this->GetOptional('format', null) != null )
+		{
+			// Add the extra column only if the property 'format' is specified for the attribute
+			$aColumns[$this->Get('sql').'_format'] = "ENUM('text','html')";
+			if ($bFullSpec)
+			{
+				$aColumns[$this->Get('sql').'_format'].= " DEFAULT 'html'"; // default 'html' is for migrating old records
+			}
+		}
+		return $aColumns;
+	}
+
+	/**
+	 * The actual formatting of the text: either text (=plain text) or html (= text with HTML markup)
+	 * @return string
+	 */
+	public function GetFormat()
+	{
+		return $this->GetOptional('format', 'html'); // Defaults to HTML
+	}
+}
+
+
+/**
+ * Map a enum column to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeEnum extends AttributeString
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_ENUM;
+
+	static public function ListExpectedParams()
+	{
+		return parent::ListExpectedParams();
+		//return array_merge(parent::ListExpectedParams(), array());
+	}
+
+	public function GetEditClass() {return "String";}
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		$oValDef = $this->GetValuesDef();
+		if ($oValDef)
+		{
+			$aValues = CMDBSource::Quote(array_keys($oValDef->GetValues(array(), "")), true);
+		}
+		else
+		{
+			$aValues = array();
+		}
+		if (count($aValues) > 0)
+		{
+			// The syntax used here do matters
+			// In particular, I had to remove unnecessary spaces to
+			// make sure that this string will match the field type returned by the DB
+			// (used to perform a comparison between the current DB format and the data model)
+			return "ENUM(".implode(",", $aValues).")"
+				.CMDBSource::GetSqlStringColumnDefinition()
+				.($bFullSpec ? $this->GetSQLColSpec() : '');
+		}
+		else
+		{
+			return "VARCHAR(255)"
+				.CMDBSource::GetSqlStringColumnDefinition()
+				.($bFullSpec ? " DEFAULT ''" : ""); // ENUM() is not an allowed syntax!
+		}
+	}
+	
+	protected function GetSQLColSpec()
+	{
+		$default = $this->ScalarToSQL($this->GetDefaultValue());
+		if (is_null($default))
+		{
+			$sRet = '';
+		}
+		else
+		{
+			// ENUMs values are strings so the default value must be a string as well,
+			// otherwise MySQL interprets the number as the zero-based index of the value in the list (i.e. the nth value in the list)
+			$sRet = " DEFAULT ".CMDBSource::Quote($default);
+		}
+		return $sRet;
+	}
+
+	public function ScalarToSQL($value)
+	{
+		// Note: for strings, the null value is an empty string and it is recorded as such in the DB
+		//	   but that wasn't working for enums, because '' is NOT one of the allowed values
+		//	   that's why a null value must be forced to a real null
+		$value = parent::ScalarToSQL($value);
+		if ($this->IsNull($value))
+		{
+			return null;
+		}
+		else
+		{
+			return $value;
+		}
+	}
+
+	public function RequiresIndex()
+	{
+		return false;
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return parent::GetBasicFilterOperators();
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return '=';
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		return parent::GetBasicFilterSQLExpr($sOpCode, $value);
+	} 
+
+	public function GetValueLabel($sValue)
+	{
+		if (is_null($sValue))
+		{
+			// Unless a specific label is defined for the null value of this enum, use a generic "undefined" label		
+			$sLabel = Dict::S('Class:'.$this->GetHostClass().'/Attribute:'.$this->GetCode().'/Value:'.$sValue, Dict::S('Enum:Undefined'));
+		}
+		else
+		{
+			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/Value:'.$sValue, null, true /*user lang*/);
+			if (is_null($sLabel))
+			{
+				$sDefault = str_replace('_', ' ', $sValue);
+				// Browse the hierarchy again, accepting default (english) translations
+				$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/Value:'.$sValue, $sDefault, false);
+			}
+		}
+		return $sLabel;
+	}
+
+	public function GetValueDescription($sValue)
+	{
+		if (is_null($sValue))
+		{
+			// Unless a specific label is defined for the null value of this enum, use a generic "undefined" label		
+			$sDescription = Dict::S('Class:'.$this->GetHostClass().'/Attribute:'.$this->GetCode().'/Value:'.$sValue.'+', Dict::S('Enum:Undefined'));
+		}
+		else
+		{
+			$sDescription = Dict::S('Class:'.$this->GetHostClass().'/Attribute:'.$this->GetCode().'/Value:'.$sValue.'+', '', true /* user language only */);
+			if (strlen($sDescription) == 0)
+			{
+				$sParentClass = MetaModel::GetParentClass($this->m_sHostClass);
+				if ($sParentClass)
+				{
+					if (MetaModel::IsValidAttCode($sParentClass, $this->m_sCode))
+					{
+						$oAttDef = MetaModel::GetAttributeDef($sParentClass, $this->m_sCode);
+						$sDescription = $oAttDef->GetValueDescription($sValue);
+					}
+				}
+			}
+		}
+		return $sDescription;
+	}
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		if ($bLocalize)
+		{
+			$sLabel = $this->GetValueLabel($sValue);
+			$sDescription = $this->GetValueDescription($sValue);
+			// later, we could imagine a detailed description in the title
+			$sRes = "<span title=\"$sDescription\">".parent::GetAsHtml($sLabel)."</span>";
+		}
+		else
+		{
+			$sRes = parent::GetAsHtml($sValue, $oHostObject, $bLocalize);
+		}
+		return $sRes;
+	}
+
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (is_null($value))
+		{
+			$sFinalValue = '';
+		}
+		elseif ($bLocalize)
+		{
+			$sFinalValue = $this->GetValueLabel($value);
+		}
+		else
+		{
+			$sFinalValue = $value;
+		}
+		$sRes = parent::GetAsXML($sFinalValue, $oHostObject, $bLocalize);
+		return $sRes;
+	}
+
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		if (is_null($sValue))
+		{
+			$sFinalValue = '';
+		}
+		elseif ($bLocalize)
+		{
+			$sFinalValue = $this->GetValueLabel($sValue);
+		}
+		else
+		{
+			$sFinalValue = $sValue;
+		}
+		$sRes = parent::GetAsCSV($sFinalValue, $sSeparator, $sTextQualifier, $oHostObject, $bLocalize);
+		return $sRes;
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\SelectField';
+	}
+
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			// Later : We should check $this->Get('display_style') and create a Radio / Select / ... regarding its value
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+
+		$oFormField->SetChoices($this->GetAllowedValues($oObject->ToArgsForQuery()));
+		parent::MakeFormField($oObject, $oFormField);
+
+		return $oFormField;
+	}
+
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		if (is_null($sValue))
+		{
+			return '';
+		}
+		else
+		{
+			return $this->GetValueLabel($sValue);
+		}
+	}
+
+	/**
+	 * Helper to get a value that will be JSON encoded
+	 * The operation is the opposite to FromJSONToValue	 
+	 */	 	
+	public function GetForJSON($value)
+	{
+		return $value;
+	}
+
+	public function GetAllowedValues($aArgs = array(), $sContains = '')
+	{
+		$aRawValues = parent::GetAllowedValues($aArgs, $sContains);
+		if (is_null($aRawValues)) return null;
+		$aLocalizedValues = array();
+		foreach ($aRawValues as $sKey => $sValue)
+		{
+			$aLocalizedValues[$sKey] = $this->GetValueLabel($sKey);
+		}
+  		return $aLocalizedValues;
+  	}
+
+  	public function GetMaxSize()
+    {
+	    return null;
+    }
+
+	/**
+	 * An enum can be localized
+	 */	 	
+	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
+	{
+		if ($bLocalizedValue)
+		{
+			// Lookup for the value matching the input
+			//
+			$sFoundValue = null;
+			$aRawValues = parent::GetAllowedValues();
+			if (!is_null($aRawValues))
+			{
+				foreach ($aRawValues as $sKey => $sValue)
+				{
+					$sRefValue = $this->GetValueLabel($sKey);
+					if ($sProposedValue == $sRefValue)
+					{
+						$sFoundValue = $sKey;
+						break;
+					}
+				}
+			}
+			if (is_null($sFoundValue))
+			{
+				return null;
+			}
+	  		return $this->MakeRealValue($sFoundValue, null);
+		}
+		else
+		{
+			return parent::MakeValueFromString($sProposedValue, $bLocalizedValue, $sSepItem, $sSepAttribute, $sSepValue, $sAttributeQualifier);
+		}
+	}
+
+  	/**
+  	 * Processes the input value to align it with the values supported
+  	 * by this type of attribute. In this case: turns empty strings into nulls
+  	 * @param mixed $proposedValue The value to be set for the attribute
+  	 * @return mixed The actual value that will be set
+  	 */
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if ($proposedValue == '') return null;
+		return parent::MakeRealValue($proposedValue, $oHostObj);
+	}
+	
+	public function GetOrderByHint()
+	{
+		$aValues = $this->GetAllowedValues();
+	
+		return Dict::Format('UI:OrderByHint_Values', implode(', ', $aValues));
+	}
+}
+
+/**
+ * A meta enum is an aggregation of enum from subclasses into an enum of a base class
+ * It has been designed is to cope with the fact that statuses must be defined in leaf classes, while it makes sense to
+ * have a superstatus available on the root classe(s)
+ *
+ * @package	 iTopORM
+ */
+class AttributeMetaEnum extends AttributeEnum
+{
+	static public function ListExpectedParams()
+	{
+		return array('allowed_values', 'sql', 'default_value', 'mapping');
+	}
+
+	public function IsNullAllowed()
+	{
+		return false; // Well... this actually depends on the mapping
+	}
+
+	public function IsWritable()
+	{
+		return false;
+	}
+
+	public function RequiresIndex()
+	{
+		return true;
+	}
+
+	public function GetPrerequisiteAttributes($sClass = null)
+	{
+		if (is_null($sClass))
+		{
+			$sClass = $this->GetHostClass();
+		}
+		$aMappingData = $this->GetMapRule($sClass);
+		if ($aMappingData == null)
+		{
+			$aRet = array();
+		}
+		else
+		{
+			$aRet = array($aMappingData['attcode']);
+		}
+		return $aRet;
+	}
+
+	/**
+	 * Overload the standard so as to leave the data unsorted
+	 *
+	 * @param array $aArgs
+	 * @param string $sContains
+	 * @return array|null
+	 */
+	public function GetAllowedValues($aArgs = array(), $sContains = '')
+	{
+		$oValSetDef = $this->GetValuesDef();
+		if (!$oValSetDef) return null;
+		$aRawValues = $oValSetDef->GetValueList();
+
+		if (is_null($aRawValues)) return null;
+		$aLocalizedValues = array();
+		foreach ($aRawValues as $sKey => $sValue)
+		{
+			$aLocalizedValues[$sKey] = Str::pure2html($this->GetValueLabel($sKey));
+		}
+		return $aLocalizedValues;
+	}
+
+	/**
+	 * Returns the meta value for the given object.
+	 * See also MetaModel::RebuildMetaEnums() that must be maintained when MapValue changes
+	 *
+	 * @param $oObject
+	 * @return mixed
+	 * @throws Exception
+	 */
+	public function MapValue($oObject)
+	{
+		$aMappingData = $this->GetMapRule(get_class($oObject));
+		if ($aMappingData == null)
+		{
+			$sRet = $this->GetDefaultValue();
+		}
+		else
+		{
+			$sAttCode = $aMappingData['attcode'];
+			$value = $oObject->Get($sAttCode);
+			if (array_key_exists($value, $aMappingData['values']))
+			{
+				$sRet = $aMappingData['values'][$value];
+			}
+			elseif ($this->GetDefaultValue() != '')
+			{
+				$sRet = $this->GetDefaultValue();
+			}
+			else
+			{
+				throw new Exception('AttributeMetaEnum::MapValue(): mapping not found for value "'.$value.'" in '.get_class($oObject).', on attribute '.MetaModel::GetAttributeOrigin($this->GetHostClass(), $this->GetCode()).'::'.$this->GetCode());
+			}
+		}
+		return $sRet;
+	}
+
+	public function GetMapRule($sClass)
+	{
+		$aMappings = $this->Get('mapping');
+		if (array_key_exists($sClass, $aMappings))
+		{
+			$aMappingData = $aMappings[$sClass];
+		}
+		else
+		{
+			$sParent = MetaModel::GetParentClass($sClass);
+			if (is_null($sParent))
+			{
+				$aMappingData = null;
+			}
+			else
+			{
+				$aMappingData = $this->GetMapRule($sParent);
+			}
+		}
+
+		return $aMappingData;
+	}
+}
+/**
+ * Map a date+time column to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeDateTime extends AttributeDBField
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_DATE_TIME;
+
+	static $oFormat = null;
+
+	/**
+	 *
+	 * @return DateTimeFormat
+	 */
+	static public function GetFormat()
+	{
+		if (self::$oFormat == null)
+		{
+			static::LoadFormatFromConfig();		
+		}
+		return self::$oFormat;
+	}	
+	
+	/**
+	 * Load the 3 settings: date format, time format and data_time format from the configuration
+	 */
+	protected static function LoadFormatFromConfig()
+	{
+		$aFormats = MetaModel::GetConfig()->Get('date_and_time_format');
+		$sLang = Dict::GetUserLanguage();
+		$sDateFormat = isset($aFormats[$sLang]['date']) ? $aFormats[$sLang]['date'] : (isset($aFormats['default']['date']) ? $aFormats['default']['date'] : 'Y-m-d');
+		$sTimeFormat = isset($aFormats[$sLang]['time']) ? $aFormats[$sLang]['time'] : (isset($aFormats['default']['time']) ? $aFormats['default']['time'] : 'H:i:s');
+		$sDateAndTimeFormat = isset($aFormats[$sLang]['date_time']) ? $aFormats[$sLang]['date_time'] : (isset($aFormats['default']['date_time']) ? $aFormats['default']['date_time'] : '$date $time');
+		
+		$sFullFormat = str_replace(array('$date', '$time'), array($sDateFormat, $sTimeFormat), $sDateAndTimeFormat);
+		
+		self::SetFormat(new DateTimeFormat($sFullFormat));
+		AttributeDate::SetFormat(new DateTimeFormat($sDateFormat));		
+	}
+	
+	/**
+	 * Returns the format string used for the date & time stored in memory
+	 * @return string
+	 */
+	static public function GetInternalFormat()
+	{
+		return 'Y-m-d H:i:s';
+	}
+
+	/**
+	 * Returns the format string used for the date & time written to MySQL
+	 * @return string
+	 */
+	static public function GetSQLFormat()
+	{
+		return 'Y-m-d H:i:s';
+	}
+	
+	static public function SetFormat(DateTimeFormat $oDateTimeFormat)
+	{
+		self::$oFormat = $oDateTimeFormat;
+	}
+	
+	static public function GetSQLTimeFormat()
+	{
+		return 'H:i:s';
+	}
+	
+	/**
+	 * Parses a search string coming from user input
+	 * @param string $sSearchString
+	 * @return string
+	 */
+	public function ParseSearchString($sSearchString)
+	{
+		try
+		{
+			$oDateTime = $this->GetFormat()->Parse($sSearchString);
+			$sSearchString = $oDateTime->format($this->GetInternalFormat());
+		}
+		catch(Exception $e)
+		{
+			$sFormatString = '!'.(string)AttributeDate::GetFormat(); // BEWARE: ! is needed to set non-parsed fields to zero !!!
+			$oDateTime = DateTime::createFromFormat($sFormatString, $sSearchString); 
+			if ($oDateTime !== false)
+			{
+				$sSearchString = $oDateTime->format($this->GetInternalFormat());
+			}
+		}
+		return $sSearchString;
+	}
+	
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\DateTimeField';
+	}
+	
+	/**
+	 * Override to specify Field class
+	 *
+	 * When called first, $oFormField is null and will be created (eg. Make). Then when the ::parent is called and the $oFormField is passed, MakeFormField behave more like a Prepare.
+	 */
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+		$oFormField->SetPHPDateTimeFormat((string) $this->GetFormat());
+		$oFormField->SetJSDateTimeFormat($this->GetFormat()->ToMomentJS());
+
+		$oFormField = parent::MakeFormField($oObject, $oFormField);
+
+		// After call to the parent as it sets the current value
+		$oFormField->SetCurrentValue($this->GetFormat()->Format($oObject->Get($this->GetCode())));
+
+		return $oFormField;
+	}
+
+    /**
+     * @inheritdoc
+     */
+    public function EnumTemplateVerbs()
+    {
+        return array(
+            '' => 'Formatted representation',
+            'raw' => 'Not formatted representation',
+        );
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
+    {
+        switch ($sVerb)
+        {
+            case '':
+            case 'text':
+                return static::GetFormat()->format($value);
+                break;
+            case 'html':
+                // Note: Not passing formatted value as the method will format it.
+                return $this->GetAsHTML($value);
+                break;
+            case 'raw':
+                return $value;
+                break;
+            default:
+                return parent::GetForTemplate($value, $sVerb, $oHostObject, $bLocalize);
+                break;
+        }
+    }
+
+	static public function ListExpectedParams()
+	{
+		return parent::ListExpectedParams();
+		//return array_merge(parent::ListExpectedParams(), array());
+	}
+
+	public function GetEditClass() {return "DateTime";}
+
+
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		return (string)static::GetFormat()->format($sValue);
+	}	
+	public function GetValueLabel($sValue, $oHostObj = null)
+	{
+		return (string)static::GetFormat()->format($sValue);
+	}	
+	
+	protected function GetSQLCol($bFullSpec = false) {return "DATETIME";}
+
+	public function GetImportColumns()
+	{
+		// Allow an empty string to be a valid value (synonym for "reset")
+		$aColumns = array();
+		$aColumns[$this->GetCode()] = 'VARCHAR(19)';
+		return $aColumns;
+	}
+
+	public static function GetAsUnixSeconds($value)
+	{
+		$oDeadlineDateTime = new DateTime($value);
+		$iUnixSeconds = $oDeadlineDateTime->format('U');
+		return $iUnixSeconds;
+	}
+
+	public function GetDefaultValue(DBObject $oHostObject = null)
+	{
+		// null value will be replaced by the current date, if not already set, in DoComputeValues
+		return $this->GetNullValue();
+	}
+
+	public function GetValidationPattern()
+	{
+		return static::GetFormat()->ToRegExpr();
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array(
+			"="=>"equals",
+			"!="=>"differs from",
+			"<"=>"before",
+			"<="=>"before",
+			">"=>"after (strictly)",
+			">="=>"after",
+			"SameDay"=>"same day (strip time)",
+			"SameMonth"=>"same year/month",
+			"SameYear"=>"same year",
+			"Today"=>"today",
+			">|"=>"after today + N days",
+			"<|"=>"before today + N days",
+			"=|"=>"equals today + N days",
+		);
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		// Unless we implement a "same xxx, depending on given precision" !
+		return "=";
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		$sQValue = CMDBSource::Quote($value);
+
+		switch ($sOpCode)
+		{
+		case '=':
+		case '!=':
+		case '<':
+		case '<=':
+		case '>':
+		case '>=':
+			return $this->GetSQLExpr()." $sOpCode $sQValue";
+		case 'SameDay':
+			return "DATE(".$this->GetSQLExpr().") = DATE($sQValue)";
+		case 'SameMonth':
+			return "DATE_FORMAT(".$this->GetSQLExpr().", '%Y-%m') = DATE_FORMAT($sQValue, '%Y-%m')";
+		case 'SameYear':
+			return "MONTH(".$this->GetSQLExpr().") = MONTH($sQValue)";
+		case 'Today':
+			return "DATE(".$this->GetSQLExpr().") = CURRENT_DATE()";
+		case '>|':
+			return "DATE(".$this->GetSQLExpr().") > DATE_ADD(CURRENT_DATE(), INTERVAL $sQValue DAY)";
+		case '<|':
+			return "DATE(".$this->GetSQLExpr().") < DATE_ADD(CURRENT_DATE(), INTERVAL $sQValue DAY)";
+		case '=|':
+			return "DATE(".$this->GetSQLExpr().") = DATE_ADD(CURRENT_DATE(), INTERVAL $sQValue DAY)";
+		default:
+			return $this->GetSQLExpr()." = $sQValue";
+		}
+	}
+	
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue))
+		{
+			return null;
+		}
+		if (is_string($proposedValue) && ($proposedValue == "") && $this->IsNullAllowed())
+		{
+			return null;
+		}
+		if (!is_numeric($proposedValue))
+		{
+			// Check the format
+			try
+			{
+				$oFormat = new DateTimeFormat($this->GetInternalFormat());
+				$oFormat->Parse($proposedValue);
+			}
+			catch (Exception $e)
+			{
+				throw new Exception('Wrong format for date attribute '.$this->GetCode().', expecting "'.$this->GetInternalFormat().'" and got "'.$proposedValue.'"');
+			}
+
+			return $proposedValue;
+		}
+
+		return date(static::GetInternalFormat(), $proposedValue);
+	}
+
+	public function ScalarToSQL($value)
+	{
+		if (empty($value))
+		{	
+			return null;
+		}
+		return $value;
+	}
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		return Str::pure2html(static::GetFormat()->format($value));
+	}
+
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		return Str::pure2xml($value);
+	}
+
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		if (empty($sValue) || ($sValue === '0000-00-00 00:00:00') || ($sValue === '0000-00-00'))
+		{
+			return '';
+		}
+		else if ((string)static::GetFormat() !== static::GetInternalFormat())
+		{
+			// Format conversion
+			$oDate = new DateTime($sValue);
+			if ($oDate !== false)
+			{
+				$sValue = static::GetFormat()->format($oDate);
+			}
+		}
+		$sFrom = array("\r\n", $sTextQualifier);
+		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
+		$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
+		return $sTextQualifier.$sEscaped.$sTextQualifier;
+	}
+
+	/**
+	 * Parses a string to find some smart search patterns and build the corresponding search/OQL condition
+	 * Each derived class is reponsible for defining and processing their own smart patterns, the base class
+	 * does nothing special, and just calls the default (loose) operator
+	 *
+	 * @param string $sSearchText The search string to analyze for smart patterns
+	 * @param FieldExpression $oField The FieldExpression representing the atttribute code in this OQL query
+	 * @param array $aParams Values of the query parameters
+	 * @param bool $bParseSearchString
+	 *
+	 * @return Expression The search condition to be added (AND) to the current search
+	 * @throws \CoreException
+	 */
+	public function GetSmartConditionExpression($sSearchText, FieldExpression $oField, &$aParams, $bParseSearchString = false)
+	{
+		// Possible smart patterns
+		$aPatterns = array(
+			'between' => array('pattern' => '/^\[(.*),(.*)\]$/', 'operator' => 'n/a'),
+			'greater than or equal' => array('pattern' => '/^>=(.*)$/', 'operator' => '>='),
+			'greater than' => array('pattern' => '/^>(.*)$/', 'operator' => '>'),
+			'less than or equal' => array('pattern' => '/^<=(.*)$/', 'operator' => '<='),
+			'less than' =>  array('pattern' => '/^<(.*)$/', 'operator' => '<'),
+		);
+		
+		$sPatternFound = '';
+		$aMatches = array();
+		foreach($aPatterns as $sPatName => $sPattern)
+		{
+			if (preg_match($sPattern['pattern'], $sSearchText, $aMatches))
+			{
+				$sPatternFound = $sPatName;
+				break;
+			}			
+		}
+		
+		switch($sPatternFound)
+		{
+			case 'between':
+			
+			$sParamName1 = $oField->GetParent().'_'.$oField->GetName().'_1';
+			$oRightExpr = new VariableExpression($sParamName1);
+			if ($bParseSearchString)
+			{
+				$aParams[$sParamName1] = $this->ParseSearchString($aMatches[1]);
+			}
+			else
+			{
+			$aParams[$sParamName1] = $aMatches[1];
+			}
+			$oCondition1 = new BinaryExpression($oField, '>=', $oRightExpr);
+
+			$sParamName2 = $oField->GetParent().'_'.$oField->GetName().'_2';
+			$oRightExpr = new VariableExpression($sParamName2);
+			if ($bParseSearchString)
+			{
+				$aParams[$sParamName2] = $this->ParseSearchString($aMatches[2]);
+			}
+			else
+			{
+			$aParams[$sParamName2] = $aMatches[2];
+			}
+			$oCondition2 = new BinaryExpression($oField, '<=', $oRightExpr);
+			
+			$oNewCondition = new BinaryExpression($oCondition1, 'AND', $oCondition2);
+			break;
+			
+			case 'greater than':
+			case 'greater than or equal':
+			case 'less than':
+			case 'less than or equal':
+			$sSQLOperator = $aPatterns[$sPatternFound]['operator'];
+			$sParamName = $oField->GetParent().'_'.$oField->GetName();
+			$oRightExpr = new VariableExpression($sParamName);
+			if ($bParseSearchString)
+			{
+				$aParams[$sParamName] = $this->ParseSearchString($aMatches[1]);
+			}
+			else
+			{
+			$aParams[$sParamName] = $aMatches[1];
+			}
+			$oNewCondition = new BinaryExpression($oField, $sSQLOperator, $oRightExpr);
+			
+			break;
+						
+			default:
+			$oNewCondition = parent::GetSmartConditionExpression($sSearchText, $oField, $aParams);
+
+		}
+
+		return $oNewCondition;
+	}
+
+
+	public function GetHelpOnSmartSearch()
+	{
+		$sDict = parent::GetHelpOnSmartSearch();
+		
+		$oFormat = static::GetFormat();
+		$sExample = $oFormat->Format(new DateTime('2015-07-19 18:40:00'));
+		return vsprintf($sDict, array($oFormat->ToPlaceholder(), $sExample));
+	}	
+}
+
+/**
+ * Store a duration as a number of seconds 
+ *
+ * @package	 iTopORM
+ */
+class AttributeDuration extends AttributeInteger
+{
+	public function GetEditClass() {return "Duration";}
+	protected function GetSQLCol($bFullSpec = false) {return "INT(11) UNSIGNED";}
+
+	public function GetNullValue() {return '0';}
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return null;
+		if (!is_numeric($proposedValue)) return null;
+		if ( ((int)$proposedValue) < 0) return null;
+
+		return (int)$proposedValue;
+	}
+
+	public function ScalarToSQL($value)
+	{
+		if (is_null($value))
+		{	
+			return null;
+		}
+		return $value;
+	}
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		return Str::pure2html(self::FormatDuration($value));
+	}
+
+	public static function FormatDuration($duration)
+	{
+		$aDuration = self::SplitDuration($duration);
+
+		if ($duration < 60)
+		{
+			// Less than 1 min
+			$sResult = Dict::Format('Core:Duration_Seconds', $aDuration['seconds']);			
+		}
+		else if ($duration < 3600)
+		{
+			// less than 1 hour, display it in minutes/seconds
+			$sResult = Dict::Format('Core:Duration_Minutes_Seconds', $aDuration['minutes'], $aDuration['seconds']);			
+		}
+		else if ($duration < 86400)
+		{
+			// Less than 1 day, display it in hours/minutes/seconds	
+			$sResult = Dict::Format('Core:Duration_Hours_Minutes_Seconds', $aDuration['hours'], $aDuration['minutes'], $aDuration['seconds']);			
+		}
+		else
+		{
+			// more than 1 day, display it in days/hours/minutes/seconds
+			$sResult = Dict::Format('Core:Duration_Days_Hours_Minutes_Seconds', $aDuration['days'], $aDuration['hours'], $aDuration['minutes'], $aDuration['seconds']);			
+		}
+		return $sResult;
+	}
+	
+	static function SplitDuration($duration)
+	{
+		$duration = (int) $duration;
+		$days = floor($duration / 86400);
+		$hours = floor(($duration - (86400*$days)) / 3600);
+		$minutes = floor(($duration - (86400*$days + 3600*$hours)) / 60);
+		$seconds = ($duration % 60); // modulo
+		return array( 'days' => $days, 'hours' => $hours, 'minutes' => $minutes, 'seconds' => $seconds );		
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\DurationField';
+	}
+
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+		parent::MakeFormField($oObject, $oFormField);
+
+		// Note : As of today, this attribute is -by nature- only supported in readonly mode, not edition
+		$sAttCode = $this->GetCode();
+		$oFormField->SetCurrentValue($oObject->Get($sAttCode));
+		$oFormField->SetReadOnly(true);
+
+		return $oFormField;
+	}
+
+}
+/**
+ * Map a date+time column to an attribute 
+ *
+ * @package	 iTopORM
+ */
+class AttributeDate extends AttributeDateTime
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_DATE;
+
+	static $oDateFormat = null;
+	
+	static public function GetFormat()
+	{
+		if (self::$oDateFormat == null)
+		{			
+			AttributeDateTime::LoadFormatFromConfig();		
+		}
+		return self::$oDateFormat;
+	}
+
+	static public function SetFormat(DateTimeFormat $oDateFormat)
+	{
+		self::$oDateFormat = $oDateFormat;
+	}
+
+	/**
+	 * Returns the format string used for the date & time stored in memory
+	 * @return string
+	 */
+	static public function GetInternalFormat()
+	{
+		return 'Y-m-d';
+	}
+
+	/**
+	 * Returns the format string used for the date & time written to MySQL
+	 * @return string
+	 */
+	static public function GetSQLFormat()
+	{
+		return 'Y-m-d';
+	}
+	
+	static public function ListExpectedParams()
+	{
+		return parent::ListExpectedParams();
+		//return array_merge(parent::ListExpectedParams(), array());
+	}
+
+	public function GetEditClass() {return "Date";}
+	protected function GetSQLCol($bFullSpec = false) {return "DATE";}
+	public function GetImportColumns()
+	{
+		// Allow an empty string to be a valid value (synonym for "reset")
+		$aColumns = array();
+		$aColumns[$this->GetCode()] = 'VARCHAR(10)';
+		return $aColumns;
+	}
+
+
+	/**
+	 * Override to specify Field class
+	 *
+	 * When called first, $oFormField is null and will be created (eg. Make). Then when the ::parent is called and the $oFormField is passed, MakeFormField behave more like a Prepare.
+	 */
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		$oFormField = parent::MakeFormField($oObject, $oFormField);
+		$oFormField->SetDateOnly(true);
+		
+		return $oFormField;
+	}
+	
+}
+
+/**
+ * A dead line stored as a date & time
+ * The only difference with the DateTime attribute is the display:
+ * relative to the current time
+ */
+class AttributeDeadline extends AttributeDateTime
+{
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		$sResult = self::FormatDeadline($value);
+		return $sResult;
+	}
+
+	public static function FormatDeadline($value)
+	{
+		$sResult = '';
+		if ($value !== null)
+		{
+			$iValue = AttributeDateTime::GetAsUnixSeconds($value);
+			$sDate = AttributeDateTime::GetFormat()->Format($value);
+			$difference = $iValue - time();
+	
+			if ($difference >= 0)
+			{
+				$sDifference = self::FormatDuration($difference);
+			}
+			else
+			{
+				$sDifference = Dict::Format('UI:DeadlineMissedBy_duration', self::FormatDuration(-$difference));
+			}
+			$sFormat = MetaModel::GetConfig()->Get('deadline_format');
+			$sResult = str_replace(array('$date$', '$difference$'), array($sDate, $sDifference), $sFormat);
+		}
+
+		return $sResult;
+	}
+
+	static function FormatDuration($duration)
+	{
+		$days = floor($duration / 86400);
+		$hours = floor(($duration - (86400*$days)) / 3600);
+		$minutes = floor(($duration - (86400*$days + 3600*$hours)) / 60);
+
+		if ($duration < 60)
+		{
+			// Less than 1 min
+			$sResult =Dict::S('UI:Deadline_LessThan1Min');			
+		}
+		else if ($duration < 3600)
+		{
+			// less than 1 hour, display it in minutes
+			$sResult =Dict::Format('UI:Deadline_Minutes', $minutes);			
+		}
+		else if ($duration < 86400)
+		{
+			// Less that 1 day, display it in hours/minutes	
+			$sResult =Dict::Format('UI:Deadline_Hours_Minutes', $hours, $minutes);			
+		}
+		else
+		{
+			// Less that 1 day, display it in hours/minutes	
+			$sResult =Dict::Format('UI:Deadline_Days_Hours_Minutes', $days, $hours, $minutes);			
+		}
+		return $sResult;
+	}
+}
+
+/**
+ * Map a foreign key to an attribute 
+ *  AttributeExternalKey and AttributeExternalField may be an external key
+ *  the difference is that AttributeExternalKey corresponds to a column into the defined table
+ *  where an AttributeExternalField corresponds to a column into another table (class)
+ *
+ * @package	 iTopORM
+ */
+class AttributeExternalKey extends AttributeDBFieldVoid
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_EXTERNAL_KEY;
+
+
+	/**
+	 * Return the search widget type corresponding to this attribute
+	 *
+	 * @return string
+	 */
+	public function GetSearchType()
+	{
+		try
+		{
+			$oRemoteAtt = $this->GetFinalAttDef();
+			$sTargetClass = $oRemoteAtt->GetTargetClass();
+			if (MetaModel::IsHierarchicalClass($sTargetClass))
+			{
+				return self::SEARCH_WIDGET_TYPE_HIERARCHICAL_KEY;
+			}
+			return self::SEARCH_WIDGET_TYPE_EXTERNAL_KEY;
+		}
+		catch (CoreException $e)
+		{
+		}
+
+		return self::SEARCH_WIDGET_TYPE_RAW;
+	}
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("targetclass", "is_null_allowed", "on_target_delete"));
+	}
+
+	public function GetEditClass() {return "ExtKey";}
+	protected function GetSQLCol($bFullSpec = false) {return "INT(11)".($bFullSpec ? " DEFAULT 0" : "");}
+	public function RequiresIndex()
+	{
+		return true;
+	}
+
+	public function IsExternalKey($iType = EXTKEY_RELATIVE) {return true;}
+	public function GetTargetClass($iType = EXTKEY_RELATIVE) {return $this->Get("targetclass");}
+	public function GetKeyAttDef($iType = EXTKEY_RELATIVE){return $this;}
+	public function GetKeyAttCode() {return $this->GetCode();} 
+	public function GetDisplayStyle() { return $this->GetOptional('display_style', 'select'); }
+	
+
+	public function GetDefaultValue(DBObject $oHostObject = null) {return 0;}
+	public function IsNullAllowed()
+	{
+		if (MetaModel::GetConfig()->Get('disable_mandatory_ext_keys'))
+		{
+			return true;
+		}
+		return $this->Get("is_null_allowed");
+	}
+
+
+	public function GetBasicFilterOperators()
+	{
+		return parent::GetBasicFilterOperators();
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return parent::GetBasicFilterLooseOperator();
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		return parent::GetBasicFilterSQLExpr($sOpCode, $value);
+	} 
+
+	// overloaded here so that an ext key always have the answer to
+	// "what are your possible values?"
+	public function GetValuesDef()
+	{
+		$oValSetDef = $this->Get("allowed_values");
+		if (!$oValSetDef)
+		{
+			// Let's propose every existing value
+			$oValSetDef = new ValueSetObjects('SELECT '.$this->GetTargetClass());
+		}
+		return $oValSetDef;
+	}
+
+	public function GetAllowedValues($aArgs = array(), $sContains = '')
+	{
+		//throw new Exception("GetAllowedValues on ext key has been deprecated");
+		try
+		{
+			return parent::GetAllowedValues($aArgs, $sContains);
+		}
+		catch (Exception $e)
+		{
+			// Some required arguments could not be found, enlarge to any existing value
+			$oValSetDef = new ValueSetObjects('SELECT '.$this->GetTargetClass());
+			return $oValSetDef->GetValues($aArgs, $sContains);
+		}
+	}
+
+	public function GetAllowedValuesAsObjectSet($aArgs = array(), $sContains = '', $iAdditionalValue = null)
+	{
+		$oValSetDef = $this->GetValuesDef();
+		$oSet = $oValSetDef->ToObjectSet($aArgs, $sContains, $iAdditionalValue);
+		return $oSet;
+	}
+
+	public function GetAllowedValuesAsFilter($aArgs = array(), $sContains = '', $iAdditionalValue = null)
+	{
+		return DBObjectSearch::FromOQL($this->GetValuesDef()->GetFilterExpression());
+	}
+
+	public function GetDeletionPropagationOption()
+	{
+		return $this->Get("on_target_delete");
+	}
+
+	public function GetNullValue()
+	{
+		return 0;
+	} 
+
+	public function IsNull($proposedValue)
+	{
+		return ($proposedValue == 0);
+	} 
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return 0;
+		if ($proposedValue === '') return 0;
+		if (MetaModel::IsValidObject($proposedValue)) return $proposedValue->GetKey();
+		return (int)$proposedValue;
+	}
+	
+	public function GetMaximumComboLength()
+	{
+		return $this->GetOptional('max_combo_length', MetaModel::GetConfig()->Get('max_combo_length'));
+	}
+	
+	public function GetMinAutoCompleteChars()
+	{
+		return $this->GetOptional('min_autocomplete_chars', MetaModel::GetConfig()->Get('min_autocomplete_chars'));
+	}
+	
+	public function AllowTargetCreation()
+	{
+		return $this->GetOptional('allow_target_creation', MetaModel::GetConfig()->Get('allow_target_creation'));
+	}
+
+	/**
+	 * Find the corresponding "link" attribute on the target class, if any
+	 * @return null | AttributeDefinition
+	 * @throws \CoreException
+	 */
+	public function GetMirrorLinkAttribute()
+	{
+		$oRet = null;
+		$sRemoteClass = $this->GetTargetClass();
+		foreach (MetaModel::ListAttributeDefs($sRemoteClass) as $sRemoteAttCode => $oRemoteAttDef)
+		{
+			if (!$oRemoteAttDef->IsLinkSet()) continue;
+			if (!is_subclass_of($this->GetHostClass(), $oRemoteAttDef->GetLinkedClass()) && $oRemoteAttDef->GetLinkedClass() != $this->GetHostClass()) continue;
+			if ($oRemoteAttDef->GetExtKeyToMe() != $this->GetCode()) continue;
+			$oRet = $oRemoteAttDef;
+			break;
+		}
+		return $oRet;
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\SelectObjectField';
+	}
+
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			// Later : We should check $this->Get('display_style') and create a Radio / Select / ... regarding its value
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+		
+		// Setting params
+		$oFormField->SetMaximumComboLength($this->GetMaximumComboLength());
+		$oFormField->SetMinAutoCompleteChars($this->GetMinAutoCompleteChars());
+		$oFormField->SetHierarchical(MetaModel::IsHierarchicalClass($this->GetTargetClass()));
+		// Setting choices regarding the field dependencies
+		$aFieldDependencies = $this->GetPrerequisiteAttributes();
+		if (!empty($aFieldDependencies))
+		{
+			$oTmpAttDef = $this;
+			$oTmpField = $oFormField;
+			$oFormField->SetOnFinalizeCallback(function() use ($oTmpField, $oTmpAttDef, $oObject)
+			{
+			    /** @var $oTmpField \Combodo\iTop\Form\Field\Field */
+			    /** @var $oTmpAttDef \AttributeDefinition */
+			    /** @var $oObject \DBObject */
+
+				// We set search object only if it has not already been set (overrided)
+				if ($oTmpField->GetSearch() === null)
+				{
+					$oSearch = DBSearch::FromOQL($oTmpAttDef->GetValuesDef()->GetFilterExpression());
+					$oSearch->SetInternalParams(array('this' => $oObject));
+					$oTmpField->SetSearch($oSearch);
+				}
+			});
+		}
+		else
+		{
+			$oSearch = DBSearch::FromOQL($this->GetValuesDef()->GetFilterExpression());
+			$oSearch->SetInternalParams(array('this' => $oObject));
+			$oFormField->SetSearch($oSearch);
+		}
+
+		// If ExtKey is mandatory, we add a validator to ensure that the value 0 is not selected
+		if ($oObject->GetAttributeFlags($this->GetCode()) & OPT_ATT_MANDATORY)
+		{
+			$oFormField->AddValidator(new \Combodo\iTop\Form\Validator\NotEmptyExtKeyValidator());
+		}
+
+		parent::MakeFormField($oObject, $oFormField);
+
+		return $oFormField;
+	}
+
+}
+
+/**
+ * Special kind of External Key to manage a hierarchy of objects
+ */
+class AttributeHierarchicalKey extends AttributeExternalKey
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_HIERARCHICAL_KEY;
+
+	protected $m_sTargetClass;
+
+	static public function ListExpectedParams()
+	{
+		$aParams = parent::ListExpectedParams();
+		$idx = array_search('targetclass', $aParams);
+		unset($aParams[$idx]);
+		$idx = array_search('jointype', $aParams);
+		unset($aParams[$idx]);
+		return $aParams; // Later: mettre les bons parametres ici !!
+	}
+
+	public function GetEditClass() {return "ExtKey";}
+	public function RequiresIndex()
+	{
+		return true;
+	}
+
+	/*
+	*  The target class is the class for which the attribute has been defined first
+	*/
+	public function SetHostClass($sHostClass)
+	{
+		if (!isset($this->m_sTargetClass))
+		{
+			$this->m_sTargetClass = $sHostClass;
+		}
+		parent::SetHostClass($sHostClass);
+	}
+
+	static public function IsHierarchicalKey() {return true;}
+	public function GetTargetClass($iType = EXTKEY_RELATIVE) {return $this->m_sTargetClass;}
+	public function GetKeyAttDef($iType = EXTKEY_RELATIVE){return $this;}
+	public function GetKeyAttCode() {return $this->GetCode();}
+
+	public function GetBasicFilterOperators()
+	{
+		return parent::GetBasicFilterOperators();
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return parent::GetBasicFilterLooseOperator();
+	}
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->GetCode()] = 'INT(11)'.($bFullSpec ? ' DEFAULT 0' : '');
+		$aColumns[$this->GetSQLLeft()] = 'INT(11)'.($bFullSpec ? ' DEFAULT 0' : '');
+		$aColumns[$this->GetSQLRight()] = 'INT(11)'.($bFullSpec ? ' DEFAULT 0' : '');
+		return $aColumns;
+	}
+	public function GetSQLRight()
+	{
+		return $this->GetCode().'_right';
+	}
+	public function GetSQLLeft()
+	{
+		return $this->GetCode().'_left';
+	}
+
+	public function GetSQLValues($value)
+	{
+		if (!is_array($value))
+		{
+			$aValues[$this->GetCode()] = $value;
+		}
+		else
+		{
+			$aValues = array();
+			$aValues[$this->GetCode()] = $value[$this->GetCode()];
+			$aValues[$this->GetSQLRight()] = $value[$this->GetSQLRight()];
+			$aValues[$this->GetSQLLeft()] = $value[$this->GetSQLLeft()];
+		}
+		return $aValues;
+	}
+
+	public function GetAllowedValues($aArgs = array(), $sContains = '')
+	{
+		$oFilter = $this->GetHierachicalFilter($aArgs, $sContains);
+		if ($oFilter)
+		{
+			$oValSetDef = $this->GetValuesDef();
+			$oValSetDef->AddCondition($oFilter);
+			return $oValSetDef->GetValues($aArgs, $sContains);
+		}
+		else
+		{
+			return parent::GetAllowedValues($aArgs, $sContains);
+		}
+	}
+
+	public function GetAllowedValuesAsObjectSet($aArgs = array(), $sContains = '', $iAdditionalValue = null)
+	{
+		$oValSetDef = $this->GetValuesDef();
+		$oFilter = $this->GetHierachicalFilter($aArgs, $sContains, $iAdditionalValue);
+		if ($oFilter)
+		{
+			$oValSetDef->AddCondition($oFilter);
+		}
+		$oSet = $oValSetDef->ToObjectSet($aArgs, $sContains, $iAdditionalValue);
+		return $oSet;
+	}
+
+	public function GetAllowedValuesAsFilter($aArgs = array(), $sContains = '', $iAdditionalValue = null)
+	{
+		$oFilter = $this->GetHierachicalFilter($aArgs, $sContains, $iAdditionalValue);
+		if ($oFilter)
+		{
+			return $oFilter;
+		}
+		return parent::GetAllowedValuesAsFilter($aArgs, $sContains, $iAdditionalValue);
+	}
+
+	private function GetHierachicalFilter($aArgs = array(), $sContains = '', $iAdditionalValue = null)
+	{
+		if (array_key_exists('this', $aArgs))
+		{
+			// Hierarchical keys have one more constraint: the "parent value" cannot be
+			// "under" themselves
+			$iRootId = $aArgs['this']->GetKey();
+			if ($iRootId > 0) // ignore objects that do no exist in the database...
+			{
+				$sClass = $this->m_sTargetClass;
+				return DBObjectSearch::FromOQL("SELECT $sClass AS node JOIN $sClass AS root ON node.".$this->GetCode()." NOT BELOW root.id WHERE root.id = $iRootId");
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Find the corresponding "link" attribute on the target class, if any
+	 * @return null | AttributeDefinition
+	 */
+	public function GetMirrorLinkAttribute()
+	{
+		return null;
+	}
+}
+
+/**
+ * An attribute which corresponds to an external key (direct or indirect) 
+ *
+ * @package	 iTopORM
+ */
+class AttributeExternalField extends AttributeDefinition
+{
+	/**
+	 * Return the search widget type corresponding to this attribute
+	 *
+	 * @return string
+	 * @throws \CoreException
+	 */
+	public function GetSearchType()
+	{
+		// Not necessary the external key is already present
+		if ($this->IsFriendlyName())
+		{
+			return self::SEARCH_WIDGET_TYPE_RAW;
+		}
+
+		try
+		{
+			$oRemoteAtt = $this->GetFinalAttDef();
+			switch (true)
+			{
+				case ($oRemoteAtt instanceof AttributeString):
+					return self::SEARCH_WIDGET_TYPE_EXTERNAL_FIELD;
+				case ($oRemoteAtt instanceof AttributeExternalKey):
+					return self::SEARCH_WIDGET_TYPE_EXTERNAL_KEY;
+			}
+		}
+		catch (CoreException $e)
+		{
+		}
+
+		return self::SEARCH_WIDGET_TYPE_RAW;
+	}
+
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("extkey_attcode", "target_attcode"));
+	}
+
+	public function GetEditClass() {return "ExtField";}
+
+	/**
+	 * @return \AttributeDefinition
+	 * @throws \CoreException
+	 */
+	public function GetFinalAttDef()
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetFinalAttDef(); 
+	}
+
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		// throw new CoreException("external attribute: does it make any sense to request its type ?");  
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetSQLCol($bFullSpec); 
+	}
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		if ($sPrefix == '')
+		{
+			return array('' => $this->GetCode()); // Warning: Use GetCode() since AttributeExternalField does not have any 'sql' property
+		}
+		else
+		{
+			return $sPrefix;
+		} 
+	}
+
+	public function GetLabel($sDefault = null)
+	{
+		if ($this->IsFriendlyName())
+		{
+			$sKeyAttCode = $this->Get("extkey_attcode");
+			$oExtKeyAttDef = MetaModel::GetAttributeDef($this->GetHostClass(), $sKeyAttCode);
+			$sLabel = $oExtKeyAttDef->GetLabel($this->m_sCode);
+		}
+		else
+		{
+			$sLabel = parent::GetLabel('');
+			if (strlen($sLabel) == 0)
+			{
+				$oRemoteAtt = $this->GetExtAttDef();
+				$sLabel = $oRemoteAtt->GetLabel($this->m_sCode);
+			}
+		}
+		return $sLabel;
+	}
+
+	public function GetLabelForSearchField()
+	{
+		$sLabel = parent::GetLabel('');
+		if (strlen($sLabel) == 0)
+		{
+			$sKeyAttCode = $this->Get("extkey_attcode");
+			$oExtKeyAttDef = MetaModel::GetAttributeDef($this->GetHostClass(), $sKeyAttCode);
+			$sLabel = $oExtKeyAttDef->GetLabel($this->m_sCode);
+
+			$oRemoteAtt = $this->GetExtAttDef();
+			$sLabel .= '->'.$oRemoteAtt->GetLabel($this->m_sCode);
+		}
+
+		return $sLabel;
+	}
+
+	public function GetDescription($sDefault = null)
+	{
+		$sLabel = parent::GetDescription('');
+		if (strlen($sLabel) == 0)
+		{
+			$oRemoteAtt = $this->GetExtAttDef();
+			$sLabel = $oRemoteAtt->GetDescription('');
+		}
+		return $sLabel;
+	} 
+	public function GetHelpOnEdition($sDefault = null)
+	{
+		$sLabel = parent::GetHelpOnEdition('');
+		if (strlen($sLabel) == 0)
+		{
+			$oRemoteAtt = $this->GetExtAttDef();
+			$sLabel = $oRemoteAtt->GetHelpOnEdition('');
+		}
+		return $sLabel;
+	} 
+
+	public function IsExternalKey($iType = EXTKEY_RELATIVE)
+	{
+		switch($iType)
+		{
+		case EXTKEY_ABSOLUTE:
+			// see further
+			$oRemoteAtt = $this->GetExtAttDef();
+			return $oRemoteAtt->IsExternalKey($iType);
+
+		case EXTKEY_RELATIVE:
+			return false;
+
+		default:
+			throw new CoreException("Unexpected value for argument iType: '$iType'");
+		}
+	}
+
+	/**
+	 * @return bool
+	 * @throws \CoreException
+	 */
+	public function IsFriendlyName()
+	{
+		$oRemoteAtt = $this->GetExtAttDef();
+		if ($oRemoteAtt instanceof AttributeExternalField)
+		{
+			$bRet = $oRemoteAtt->IsFriendlyName();
+		}
+		elseif ($oRemoteAtt instanceof  AttributeFriendlyName)
+		{
+			$bRet = true;
+		}
+		else
+		{
+			$bRet = false;
+		}
+		return $bRet;
+	}
+
+	public function GetTargetClass($iType = EXTKEY_RELATIVE)
+	{
+		return $this->GetKeyAttDef($iType)->GetTargetClass();
+	}
+
+	static public function IsExternalField() {return true;}
+
+	public function GetKeyAttCode()
+	{
+		return $this->Get("extkey_attcode");
+	}
+
+	public function GetExtAttCode()
+	{
+		return $this->Get("target_attcode");
+	}
+
+	/**
+	 * @param int $iType
+	 *
+	 * @return \AttributeExternalKey
+	 * @throws \CoreException
+	 * @throws \Exception
+	 */
+	public function GetKeyAttDef($iType = EXTKEY_RELATIVE)
+	{
+		switch($iType)
+		{
+		case EXTKEY_ABSOLUTE:
+			// see further
+			/** @var \AttributeExternalKey $oRemoteAtt */
+			$oRemoteAtt = $this->GetExtAttDef();
+			if ($oRemoteAtt->IsExternalField())
+			{
+				return $oRemoteAtt->GetKeyAttDef(EXTKEY_ABSOLUTE);
+			}
+			else if ($oRemoteAtt->IsExternalKey())
+			{
+				return $oRemoteAtt;
+			}
+			return $this->GetKeyAttDef(EXTKEY_RELATIVE); // which corresponds to the code hereafter !
+
+		case EXTKEY_RELATIVE:
+            /** @var \AttributeExternalKey $oAttDef */
+			$oAttDef = MetaModel::GetAttributeDef($this->GetHostClass(), $this->Get("extkey_attcode"));
+			return $oAttDef;
+
+		default:
+			throw new CoreException("Unexpected value for argument iType: '$iType'");
+		}
+	}
+	
+	public function GetPrerequisiteAttributes($sClass = null)
+	{
+		return array($this->Get("extkey_attcode"));
+	}
+
+
+	/**
+	 * @return \AttributeExternalField
+	 * @throws \CoreException
+	 * @throws \Exception
+	 */
+	public function GetExtAttDef()
+	{
+		$oKeyAttDef = $this->GetKeyAttDef();
+		/** @var \AttributeExternalField $oExtAttDef */
+		$oExtAttDef = MetaModel::GetAttributeDef($oKeyAttDef->GetTargetClass(), $this->Get("target_attcode"));
+		if (!is_object($oExtAttDef)) throw new CoreException("Invalid external field ".$this->GetCode()." in class ".$this->GetHostClass().". The class ".$oKeyAttDef->GetTargetClass()." has no attribute ".$this->Get("target_attcode"));
+		return $oExtAttDef;
+	}
+
+	/**
+	 * @return mixed
+	 * @throws \CoreException
+	 */
+	public function GetSQLExpr()
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetSQLExpr(); 
+	} 
+
+	public function GetDefaultValue(DBObject $oHostObject = null)
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetDefaultValue();
+	}
+	public function IsNullAllowed()
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->IsNullAllowed(); 
+	}
+
+	static public function IsScalar()
+	{
+		return true;
+	}
+
+	public function GetFilterDefinitions()
+	{
+		return array($this->GetCode() => new FilterFromAttribute($this));
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetBasicFilterOperators(); 
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetBasicFilterLooseOperator(); 
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetBasicFilterSQLExpr($sOpCode, $value);
+	} 
+
+	public function GetNullValue()
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetNullValue();
+	} 
+
+	public function IsNull($proposedValue)
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->IsNull($proposedValue);
+	} 
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->MakeRealValue($proposedValue, $oHostObj);
+	}
+
+	public function ScalarToSQL($value)
+	{
+		// This one could be used in case of filtering only
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->ScalarToSQL($value);
+	}
+
+
+	// Do not overload GetSQLExpression here because this is handled in the joins
+	//public function GetSQLExpressions($sPrefix = '') {return array();}
+
+	// Here, we get the data...
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->FromSQLToValue($aCols, $sPrefix);
+	}
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetAsHTML($value, null, $bLocalize);
+	}
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetAsXML($value, null, $bLocalize);
+	}
+	public function GetAsCSV($value, $sSeparator = ',', $sTestQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		$oExtAttDef = $this->GetExtAttDef();
+		return $oExtAttDef->GetAsCSV($value, $sSeparator, $sTestQualifier, null, $bLocalize, $bConvertToPlainText);
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\LabelField';
+	}
+
+	/**
+	 * @param \DBObject $oObject
+	 * @param \Combodo\iTop\Form\Field\Field $oFormField
+	 *
+	 * @return null
+	 * @throws \CoreException
+	 */
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+	    // Retrieving AttDef from the remote attribute
+        $oRemoteAttDef = $this->GetExtAttDef();
+
+        if ($oFormField === null)
+		{
+		    // ExternalField's FormField are actually based on the FormField from the target attribute.
+            // Except for the AttributeExternalKey because we have no OQL and stuff
+            if($oRemoteAttDef instanceof AttributeExternalKey)
+            {
+                $sFormFieldClass = static::GetFormFieldClass();
+            }
+            else
+            {
+                $sFormFieldClass = $oRemoteAttDef::GetFormFieldClass();
+            }
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+		parent::MakeFormField($oObject, $oFormField);
+
+        // Manually setting for remote ExternalKey, otherwise, the id would be displayed.
+		if($oRemoteAttDef instanceof AttributeExternalKey)
+        {
+            $oFormField->SetCurrentValue($oObject->Get($this->GetCode().'_friendlyname'));
+        }
+
+		// Readonly field because we can't update external fields
+		$oFormField->SetReadOnly(true);
+
+		return $oFormField;
+	}
+
+	public function IsPartOfFingerprint()
+	{
+		return false;
+	}
+
+}
+
+
+/**
+ * Multi value list of tags
+ *
+ * @see TagSetFieldData
+ * @since 2.6 N°931 tag fields
+ */
+class AttributeTagSet extends AttributeDBFieldVoid
+{
+    const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+    static public function ListExpectedParams()
+    {
+        return array_merge(parent::ListExpectedParams(), array("is_null_allowed"));
+    }
+    public function GetDefaultValue(DBObject $oHostObject = null) {return null;}
+    public function IsNullAllowed() {return $this->Get("is_null_allowed");}
+
+    public function GetEditClass() {
+        return "String";
+    }
+
+    public function GetEditValue($value, $oHostObj = null)
+    {
+        if (empty($value))
+        {
+            return '';
+        }
+        if ($value instanceof ormTagSet)
+        {
+            $aValues = $value->GetValue();
+            return implode(' ', $aValues);
+        }
+        return '';
+    }
+
+    protected function GetSQLCol($bFullSpec = false)
+    {
+        return 'VARCHAR(255)'
+            .CMDBSource::GetSqlStringColumnDefinition()
+            .($bFullSpec ? $this->GetSQLColSpec() : '');
+    }
+
+    public function GetMaxSize()
+    {
+        return 255;
+    }
+
+    public function RequiresIndex() {return true;}
+
+	public function RequiresFullTextIndex() {return true;}
+
+    public function Equals($val1, $val2) {
+        if (($val1 instanceof ormTagSet) && ($val2 instanceof ormTagSet))
+        {
+            return $val1->Equals($val2);
+        }
+        return ($val1 == $val2);
+    }
+
+    /**
+     * force an allowed value (type conversion and possibly forces a value as mySQL would do upon writing!
+     *
+     * @param $proposedValue
+     * @param $oHostObj
+     *
+     * @return mixed
+     * @throws \Exception
+     */
+    public function MakeRealValue($proposedValue, $oHostObj)
+    {
+        $oTagSet = new ormTagSet(MetaModel::GetAttributeOrigin($this->GetHostClass(), $this->GetCode()), $this->GetCode());
+        if (is_string($proposedValue) && !empty($proposedValue))
+        {
+            $aTagCodes = explode(' ', "$proposedValue");
+            $oTagSet->SetValue($aTagCodes);
+        }
+        elseif ($proposedValue instanceof ormTagSet)
+        {
+            $oTagSet = $proposedValue;
+        }
+        return $oTagSet;
+    }
+
+    /**
+     * Get the value from a given string (plain text, CSV import)
+     *
+     * @param string $sProposedValue
+     * @param bool $bLocalizedValue
+     * @param string $sSepItem
+     * @param string $sSepAttribute
+     * @param string $sSepValue
+     * @param string $sAttributeQualifier
+     *
+     * @return mixed null if no match could be found
+     * @throws \Exception
+     */
+    public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
+    {
+        // TODO $bLocalizedValue
+        return $this->MakeRealValue($sProposedValue, null);
+    }
+
+    public function GetNullValue() {
+        return new ormTagSet(MetaModel::GetAttributeOrigin($this->GetHostClass(), $this->GetCode()), $this->GetCode());
+    }
+
+    public function IsNull($proposedValue)
+    {
+        /** @var \ormTagSet $proposedValue */
+        return count($proposedValue->GetValue()) == 0;
+    }
+
+    /**
+     * To be overloaded for localized enums
+     *
+     * @param $sValue
+     *
+     * @return string label corresponding to the given value (in plain text)
+     */
+    public function GetValueLabel($sValue)
+    {
+        // TODO
+        return $sValue;
+    }
+
+    /**
+     * @param $value
+     *
+     * @return string
+     * @throws \CoreWarning
+     */
+    public function ScalarToSQL($value)
+    {
+        if (empty($value))
+        {
+            return '';
+        }
+        if ($value instanceof ormTagSet)
+        {
+            $aValues = $value->GetValue();
+            return implode(' ', $aValues);
+        }
+        throw new CoreWarning('Expected the attribute value to be a string', array('found_type' => gettype($value), 'value' => $value, 'class' => $this->GetHostClass(), 'attribute' => $this->GetCode()));
+    }
+
+	/**
+	 * @param $value
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 *
+	 * @return string|null
+	 *
+	 * @throws \CoreException
+	 * @throws \Exception
+	 */
+    public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+    {
+        if ($value instanceof ormTagSet)
+        {
+            if ($bLocalize)
+            {
+                $aValues = $value->GetTags();
+            }
+            else
+            {
+                $aValues = $value->GetValue();
+            }
+            if (empty($aValues))
+            {
+                return '';
+            }
+            return '<span class="attribute-tagset">'.implode('</span><span class="attribute-tagset">', $aValues).'</span>';
+        }
+        if (is_string($value))
+        {
+	        try
+	        {
+		        $oValue = $this->MakeRealValue($value, $oHostObject);
+		        return $this->GetAsHTML($oValue, $oHostObject, $bLocalize);
+	        }
+	        catch (Exception $e)
+	        {
+	        	// unknown tags are present display the code instead
+	        }
+	        $aTagCodes = explode(' ', $value);
+	        $aValues = array();
+	        $oTagSet = new ormTagSet(MetaModel::GetAttributeOrigin($this->GetHostClass(), $this->GetCode()), $this->GetCode());
+	        foreach ($aTagCodes as $sTagCode)
+	        {
+		        try
+		        {
+			        $oTagSet->AddTag($sTagCode);
+		        }
+		        catch (Exception $e)
+		        {
+			        $aValues[] = $sTagCode;
+		        }
+	        }
+	        $sHTML = '';
+	        if (!empty($aValues))
+	        {
+		        $sHTML .= '<span class="attribute-tagset-undefined">'.implode('</span><span class="attribute-tagset-undefined">', $aValues).'</span>';
+	        }
+	        $aValues = $oTagSet->GetTags();
+	        if (!empty($aValues))
+	        {
+		        $sHTML .= '<span class="attribute-tagset">'.implode('</span><span class="attribute-tagset">', $aValues).'</span>';
+	        }
+
+	        return $sHTML;
+        }
+        return parent::GetAsHTML($value, $oHostObject, $bLocalize);
+
+    }
+
+    /**
+     * @param $value
+     * @param \DBObject $oHostObject
+     * @param bool $bLocalize
+     *
+     * @return string
+     *
+     */
+    public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+    {
+        if (is_object($value) && ($value instanceof ormTagSet))
+        {
+            $sRes = "<Set>\n";
+            if ($bLocalize)
+            {
+                $aValues = $value->GetTags();
+            }
+            else
+            {
+                $aValues = $value->GetValue();
+            }            if (!empty($aValuess))
+            {
+                $sRes .= '<Tag>'.implode('</Tag><Tag>', $aValues).'</Tag>';
+            }
+            $sRes .= "</Set>\n";
+        }
+        else
+        {
+            $sRes = '';
+        }
+        return $sRes;
+    }
+
+    /**
+     * @param $value
+     * @param string $sSeparator
+     * @param string $sTextQualifier
+     * @param \DBObject $oHostObject
+     * @param bool $bLocalize
+     * @param bool $bConvertToPlainText
+     *
+     * @return mixed|string
+     * @throws \CoreException
+     */
+    public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+    {
+        if (is_object($value) && ($value instanceof ormTagSet))
+        {
+            if ($bLocalize)
+            {
+                $aValues = $value->GetTags();
+            }
+            else
+            {
+                $aValues = $value->GetValue();
+            }
+            $sRes = implode('|', $aValues);
+        }
+        else
+        {
+            $sRes = '';
+        }
+        return $sRes;
+    }
+
+    /**
+     * List the available verbs for 'GetForTemplate'
+     */
+    public function EnumTemplateVerbs()
+    {
+        return array(
+            '' => 'Plain text (unlocalized) representation',
+            'html' => 'HTML representation (unordered list)',
+        );
+    }
+
+    /**
+     * Get various representations of the value, for insertion into a template (e.g. in Notifications)
+     *
+     * @param mixed $value The current value of the field
+     * @param string $sVerb The verb specifying the representation of the value
+     * @param DBObject $oHostObject The object
+     * @param bool $bLocalize Whether or not to localize the value
+     *
+     * @return string
+     * @throws \Exception
+     */
+    public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
+    {
+        if (is_object($value) && ($value instanceof ormTagSet))
+        {
+            if ($bLocalize)
+            {
+                $aValues = $value->GetTags();
+            }
+            else
+            {
+                $aValues = $value->GetValue();
+            }
+
+            switch ($sVerb)
+            {
+                case '':
+                    return implode(' ', $aValues);
+
+                case 'html':
+                    return '<ul><li>'.implode("</li><li>", $aValues).'</li></ul>';
+
+                default:
+                    throw new Exception("Unknown verb '$sVerb' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
+            }
+        }
+        throw new CoreUnexpectedValue("Bad value '$value' for attribute ".$this->GetCode().' in class '.get_class($oHostObject));
+    }
+
+    /**
+     * Helper to get a value that will be JSON encoded
+     * The operation is the opposite to FromJSONToValue
+     *
+     * @param \ormTagSet $value
+     *
+     * @return array
+     * @throws \CoreException
+     */
+    public function GetForJSON($value)
+    {
+        $aRet = array();
+        if (is_object($value) && ($value instanceof ormTagSet))
+        {
+            $aRet = $value->GetValue();
+        }
+        return $aRet;
+    }
+
+    /**
+     * Helper to form a value, given JSON decoded data
+     * The operation is the opposite to GetForJSON
+     *
+     * @param $json
+     *
+     * @return \ormTagSet
+     * @throws \CoreException
+     * @throws \CoreUnexpectedValue
+     * @throws \Exception
+     */
+    public function FromJSONToValue($json)
+    {
+        $oSet = new ormTagSet($this->GetHostClass(), $this->GetCode());
+        $oSet->SetValue($json);
+        return $oSet;
+    }
+
+    /**
+     * The part of the current attribute in the object's signature, for the supplied value
+     * @param mixed $value The value of this attribute for the object
+     * @return string The "signature" for this field/attribute
+     */
+    public function Fingerprint($value)
+    {
+        if ($value instanceof ormTagSet)
+        {
+            $aValues = $value->GetValue();
+            return implode(' ', $aValues);
+        }
+        return parent::Fingerprint($value);
+    }
+
+}
+
+/**
+ * Map a varchar column to an URL (formats the ouput in HMTL) 
+ *
+ * @package	 iTopORM
+ */
+class AttributeURL extends AttributeString
+{
+	static public function ListExpectedParams()
+	{
+		//return parent::ListExpectedParams();
+		return array_merge(parent::ListExpectedParams(), array("target"));
+	}
+
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return "VARCHAR(2048)"
+			.CMDBSource::GetSqlStringColumnDefinition()
+			.($bFullSpec ? $this->GetSQLColSpec() : '');
+	}
+
+	public function GetMaxSize()
+	{
+		return 2048;
+	}
+	
+	public function GetEditClass() {return "String";}
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		$sTarget = $this->Get("target");
+		if (empty($sTarget)) $sTarget = "_blank";
+		$sLabel = Str::pure2html($sValue);
+		if (strlen($sLabel) > 128)
+		{
+			// Truncate the length to 128 characters, by removing the middle
+			$sLabel = substr($sLabel, 0, 100).'.....'.substr($sLabel, -20);
+		}
+		return "<a target=\"$sTarget\" href=\"$sValue\">$sLabel</a>";
+	}
+
+	public function GetValidationPattern()
+	{
+		return $this->GetOptional('validation_pattern', '^'.utils::GetConfig()->Get('url_validation_pattern').'$');
+	}
+
+    static public function GetFormFieldClass()
+    {
+        return '\\Combodo\\iTop\\Form\\Field\\UrlField';
+    }
+
+	/**
+	 * @param \DBObject $oObject
+	 * @param  \Combodo\iTop\Form\Field\UrlField $oFormField
+	 *
+	 * @return null
+	 * @throws \CoreException
+	 */
+    public function MakeFormField(DBObject $oObject, $oFormField = null)
+    {
+        if ($oFormField === null)
+        {
+            $sFormFieldClass = static::GetFormFieldClass();
+            $oFormField = new $sFormFieldClass($this->GetCode());
+        }
+        parent::MakeFormField($oObject, $oFormField);
+
+        $oFormField->SetTarget($this->Get('target'));
+
+        return $oFormField;
+    }
+}
+
+/**
+ * A blob is an ormDocument, it is stored as several columns in the database  
+ *
+ * @package	 iTopORM
+ */
+class AttributeBlob extends AttributeDefinition
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("depends_on"));
+	}
+
+	public function GetEditClass() {return "Document";}
+
+	static public function IsBasedOnDBColumns() {return true;}
+	static public function IsScalar() {return true;}
+	public function IsWritable() {return true;}
+	public function GetDefaultValue(DBObject $oHostObject = null) {return "";}
+	public function IsNullAllowed(DBObject $oHostObject = null) {return $this->GetOptional("is_null_allowed", false);}
+
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		return '';
+	}
+	
+	/**
+	 * Users can provide the document from an URL (including an URL on iTop itself)
+	 * for CSV import. Administrators can even provide the path to a local file
+	 * {@inheritDoc}
+	 * @see AttributeDefinition::MakeRealValue()
+	 */
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if ($proposedValue === null) return null;
+		
+		if (is_object($proposedValue))
+		{
+			$proposedValue = clone $proposedValue;
+		}
+		else
+		{
+			try
+			{
+				// Read the file from iTop, an URL (or the local file system - for admins only)
+				$proposedValue = Utils::FileGetContentsAndMIMEType($proposedValue);
+			}
+			catch(Exception $e)
+			{
+				IssueLog::Warning(get_class($this)."::MakeRealValue - ".$e->getMessage());
+				// Not a real document !! store is as text !!! (This was the default behavior before)
+				$proposedValue = new ormDocument($e->getMessage()." \n".$proposedValue, 'text/plain');
+			}	
+		}
+		return $proposedValue;
+	}
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		if ($sPrefix == '')
+		{
+			$sPrefix = $this->GetCode();
+		}
+		$aColumns = array();
+		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
+		$aColumns[''] = $sPrefix.'_mimetype';
+		$aColumns['_data'] = $sPrefix.'_data';
+		$aColumns['_filename'] = $sPrefix.'_filename';
+		return $aColumns;
+	}
+
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		if (!array_key_exists($sPrefix, $aCols))
+		{
+			$sAvailable = implode(', ', array_keys($aCols));
+			throw new MissingColumnException("Missing column '$sPrefix' from {$sAvailable}");
+		} 
+		$sMimeType = isset($aCols[$sPrefix]) ? $aCols[$sPrefix] : '';
+
+		if (!array_key_exists($sPrefix.'_data', $aCols)) 
+		{
+			$sAvailable = implode(', ', array_keys($aCols));
+			throw new MissingColumnException("Missing column '".$sPrefix."_data' from {$sAvailable}");
+		} 
+		$data = isset($aCols[$sPrefix.'_data']) ? $aCols[$sPrefix.'_data'] : null;
+
+		if (!array_key_exists($sPrefix.'_filename', $aCols)) 
+		{
+			$sAvailable = implode(', ', array_keys($aCols));
+			throw new MissingColumnException("Missing column '".$sPrefix."_filename' from {$sAvailable}");
+		} 
+		$sFileName =  isset($aCols[$sPrefix.'_filename']) ? $aCols[$sPrefix.'_filename'] : '';
+
+		$value = new ormDocument($data, $sMimeType, $sFileName);
+		return $value;
+	}
+
+	public function GetSQLValues($value)
+	{
+		// #@# Optimization: do not load blobs anytime
+		//	 As per mySQL doc, selecting blob columns will prevent mySQL from
+		//	 using memory in case a temporary table has to be created
+		//	 (temporary tables created on disk)
+		//	 We will have to remove the blobs from the list of attributes when doing the select
+		//	 then the use of Get() should finalize the load
+		if ($value instanceOf ormDocument && !$value->IsEmpty())
+		{
+			$aValues = array();
+			$aValues[$this->GetCode().'_data'] = $value->GetData();
+			$aValues[$this->GetCode().'_mimetype'] = $value->GetMimeType();
+			$aValues[$this->GetCode().'_filename'] = $value->GetFileName();
+		}
+		else
+		{
+			$aValues = array();
+			$aValues[$this->GetCode().'_data'] = '';
+			$aValues[$this->GetCode().'_mimetype'] = '';
+			$aValues[$this->GetCode().'_filename'] = '';
+		}
+		return $aValues;
+	}
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->GetCode().'_data'] = 'LONGBLOB'; // 2^32 (4 Gb)
+		$aColumns[$this->GetCode().'_mimetype'] = 'VARCHAR(255)'.CMDBSource::GetSqlStringColumnDefinition();
+		$aColumns[$this->GetCode().'_filename'] = 'VARCHAR(255)'.CMDBSource::GetSqlStringColumnDefinition();
+		return $aColumns;
+	}
+
+	public function GetFilterDefinitions()
+	{
+		return array();
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array();
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return '=';
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		return 'true';
+	} 
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (is_object($value))
+		{
+			return $value->GetAsHTML();
+		}
+		return '';
+	}
+
+	/**
+	 * @param string $sValue
+	 * @param string $sSeparator
+	 * @param string $sTextQualifier
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 * @param bool $bConvertToPlainText
+	 *
+	 * @return string
+	 */
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		$sAttCode = $this->GetCode();
+		if ($sValue instanceof ormDocument && !$sValue->IsEmpty())
+		{
+			return $sValue->GetDownloadURL(get_class($oHostObject), $oHostObject->GetKey(), $sAttCode);
+		}
+		return ''; // Not exportable in CSV !
+	}
+
+	/**
+	 * @param $value
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 *
+	 * @return mixed|string
+	 */
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		$sRet = '';
+		if (is_object($value))
+		{
+			if (!$value->IsEmpty())
+			{
+				$sRet = '<mimetype>'.$value->GetMimeType().'</mimetype>';
+				$sRet .= '<filename>'.$value->GetFileName().'</filename>';
+				$sRet .= '<data>'.base64_encode($value->GetData()).'</data>';
+			}
+		}
+		return $sRet;
+	}
+
+	/**
+	 * Helper to get a value that will be JSON encoded
+	 * The operation is the opposite to FromJSONToValue	 
+	 */	 	
+	public function GetForJSON($value)
+	{
+		if ($value instanceOf ormDocument)
+		{
+			$aValues = array();
+			$aValues['data'] = base64_encode($value->GetData());
+			$aValues['mimetype'] = $value->GetMimeType();
+			$aValues['filename'] = $value->GetFileName();
+		}
+		else
+		{
+			$aValues = null;
+		}
+		return $aValues;
+	}
+
+	/**
+	 * Helper to form a value, given JSON decoded data
+	 * The operation is the opposite to GetForJSON	 
+	 */	 	
+	public function FromJSONToValue($json)
+	{
+		if (isset($json->data))
+		{
+			$data = base64_decode($json->data);
+			$value = new ormDocument($data, $json->mimetype, $json->filename);
+		}
+		else
+		{
+			$value = null;
+		}
+		return $value;
+	}
+	
+	public function Fingerprint($value)
+	{
+		$sFingerprint = '';
+		if ($value instanceOf ormDocument)
+		{
+			$sFingerprint = md5($value->GetData());
+		}
+		return $sFingerprint;		
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\BlobField';
+	}
+
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+
+		// Note: As of today we want this field to always be read-only
+		$oFormField->SetReadOnly(true);
+
+		// Generating urls
+		$value = $oObject->Get($this->GetCode());
+		$oFormField->SetDownloadUrl($value->GetDownloadURL(get_class($oObject), $oObject->GetKey(), $this->GetCode()));
+		$oFormField->SetDisplayUrl($value->GetDisplayURL(get_class($oObject), $oObject->GetKey(), $this->GetCode()));
+
+		parent::MakeFormField($oObject, $oFormField);
+
+		return $oFormField;
+	}
+
+}
+
+/**
+ * An image is a specific type of document, it is stored as several columns in the database
+ *
+ * @package	 iTopORM
+ */
+class AttributeImage extends AttributeBlob
+{
+	public function GetEditClass() {return "Image";}
+
+	/**
+	 * {@inheritDoc}
+	 * @see AttributeBlob::MakeRealValue()
+	 */
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		$oDoc = parent::MakeRealValue($proposedValue, $oHostObj);
+		// The validation of the MIME Type is done by CheckFormat below
+		return $oDoc;
+	}
+	
+	/**
+	 * Check that the supplied ormDocument actually contains an image
+	 * {@inheritDoc}
+	 * @see AttributeDefinition::CheckFormat()
+	 */
+	public function CheckFormat($value)
+	{
+		if ($value instanceof ormDocument && !$value->IsEmpty())
+		{
+			return ($value->GetMainMimeType() == 'image');
+		}
+		return true;
+	}
+	
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		$iMaxWidthPx = $this->Get('display_max_width').'px';
+		$iMaxHeightPx = $this->Get('display_max_height').'px';
+		$sUrl = $this->Get('default_image');
+		$sRet = ($sUrl !== null) ? '<img src="'.$sUrl.'" style="max-width: '.$iMaxWidthPx.'; max-height: '.$iMaxHeightPx.'">' : '';
+		if (is_object($value) && !$value->IsEmpty())
+		{
+			if ($oHostObject->IsNew() || ($oHostObject->IsModified() && (array_key_exists($this->GetCode(), $oHostObject->ListChanges()))))
+			{
+				// If the object is modified (or not yet stored in the database) we must serve the content of the image directly inline
+				// otherwise (if we just give an URL) the browser will be given the wrong content... and may cache it
+				$sUrl = 'data:'.$value->GetMimeType().';base64,'.base64_encode($value->GetData());
+			}
+			else
+			{
+				$sUrl = $value->GetDownloadURL(get_class($oHostObject), $oHostObject->GetKey(), $this->GetCode());
+			}
+			$sRet = '<img src="'.$sUrl.'" style="max-width: '.$iMaxWidthPx.'; max-height: '.$iMaxHeightPx.'">';
+		}
+		return '<div class="view-image" style="width: '.$iMaxWidthPx.'; height: '.$iMaxHeightPx.';"><span class="helper-middle"></span>'.$sRet.'</div>';
+	}
+
+    static public function GetFormFieldClass()
+    {
+        return '\\Combodo\\iTop\\Form\\Field\\ImageField';
+    }
+
+    public function MakeFormField(DBObject $oObject, $oFormField = null)
+    {
+        if ($oFormField === null)
+        {
+            $sFormFieldClass = static::GetFormFieldClass();
+            $oFormField = new $sFormFieldClass($this->GetCode());
+        }
+
+        parent::MakeFormField($oObject, $oFormField);
+
+        // Generating urls
+        $value = $oObject->Get($this->GetCode());
+        if (is_object($value) && !$value->IsEmpty())
+        {
+            $oFormField->SetDownloadUrl($value->GetDownloadURL(get_class($oObject), $oObject->GetKey(), $this->GetCode()));
+            $oFormField->SetDisplayUrl($value->GetDisplayURL(get_class($oObject), $oObject->GetKey(), $this->GetCode()));
+        }
+        else
+        {
+            $oFormField->SetDownloadUrl($this->Get('default_image'));
+            $oFormField->SetDisplayUrl($this->Get('default_image'));
+        }
+
+        return $oFormField;
+    }
+}
+/**
+ * A stop watch is an ormStopWatch object, it is stored as several columns in the database  
+ *
+ * @package	 iTopORM
+ */
+class AttributeStopWatch extends AttributeDefinition
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static public function ListExpectedParams()
+	{
+		// The list of thresholds must be an array of iPercent => array of 'option' => value
+		return array_merge(parent::ListExpectedParams(), array("states", "goal_computing", "working_time_computing", "thresholds"));
+	}
+
+	public function GetEditClass() {return "StopWatch";}
+
+	static public function IsBasedOnDBColumns() {return true;}
+	static public function IsScalar() {return true;}
+	public function IsWritable() {return true;}
+	public function GetDefaultValue(DBObject $oHostObject = null) {return $this->NewStopWatch();}
+
+	/**
+	 * @param \ormStopWatch $value
+	 * @param \DBObject $oHostObj
+	 *
+	 * @return string
+	 */
+	public function GetEditValue($value, $oHostObj = null)
+	{
+		return $value->GetTimeSpent();
+	}
+
+	public function GetStates()
+	{
+		return $this->Get('states');
+	}
+
+	public function AlwaysLoadInTables()
+	{
+		// Each and every stop watch is accessed for computing the highlight code (DBObject::GetHighlightCode())
+		return true;
+	}
+
+	/**
+	 * Construct a brand new (but configured) stop watch
+	 */	 	
+	public function NewStopWatch()
+	{
+		$oSW = new ormStopWatch();
+		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+		{
+			$oSW->DefineThreshold($iThreshold);
+		}
+		return $oSW;
+	}
+
+	// Facilitate things: allow the user to Set the value from a string
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (!$proposedValue instanceof ormStopWatch)
+		{
+			return $this->NewStopWatch();
+		}
+		return $proposedValue;
+	}
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		if ($sPrefix == '')
+		{
+			$sPrefix = $this->GetCode(); // Warning: a stopwatch does not have any 'sql' property, so its SQL column is equal to its attribute code !!
+		}
+		$aColumns = array();
+		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
+		$aColumns[''] = $sPrefix.'_timespent';
+		$aColumns['_started'] = $sPrefix.'_started';
+		$aColumns['_laststart'] = $sPrefix.'_laststart';
+		$aColumns['_stopped'] = $sPrefix.'_stopped';
+		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+		{
+			$sThPrefix = '_'.$iThreshold;
+			$aColumns[$sThPrefix.'_deadline'] = $sPrefix.$sThPrefix.'_deadline';
+			$aColumns[$sThPrefix.'_passed'] = $sPrefix.$sThPrefix.'_passed';
+			$aColumns[$sThPrefix.'_triggered'] = $sPrefix.$sThPrefix.'_triggered';
+			$aColumns[$sThPrefix.'_overrun'] = $sPrefix.$sThPrefix.'_overrun';
+		}
+		return $aColumns;
+	}
+
+	public static function DateToSeconds($sDate)
+	{
+		if (is_null($sDate))
+		{
+			return null;
+		}
+		$oDateTime = new DateTime($sDate);
+		$iSeconds = $oDateTime->format('U');
+		return $iSeconds;
+	}
+
+	public static function SecondsToDate($iSeconds)
+	{
+		if (is_null($iSeconds))
+		{
+			return null;
+		}
+		return date("Y-m-d H:i:s", $iSeconds);
+	}
+
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		$aExpectedCols = array($sPrefix, $sPrefix.'_started', $sPrefix.'_laststart', $sPrefix.'_stopped');
+		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+		{
+			$sThPrefix = '_'.$iThreshold;
+			$aExpectedCols[] = $sPrefix.$sThPrefix.'_deadline';
+			$aExpectedCols[] = $sPrefix.$sThPrefix.'_passed';
+			$aExpectedCols[] = $sPrefix.$sThPrefix.'_triggered';
+			$aExpectedCols[] = $sPrefix.$sThPrefix.'_overrun';
+		}
+		foreach ($aExpectedCols as $sExpectedCol)
+		{
+			if (!array_key_exists($sExpectedCol, $aCols))
+			{
+				$sAvailable = implode(', ', array_keys($aCols));
+				throw new MissingColumnException("Missing column '$sExpectedCol' from {$sAvailable}");
+			} 
+		}
+
+		$value = new ormStopWatch(
+			$aCols[$sPrefix],
+			self::DateToSeconds($aCols[$sPrefix.'_started']),
+			self::DateToSeconds($aCols[$sPrefix.'_laststart']),
+			self::DateToSeconds($aCols[$sPrefix.'_stopped'])
+		);
+
+		foreach ($this->ListThresholds() as $iThreshold => $aDefinition)
+		{
+			$sThPrefix = '_'.$iThreshold;
+			$value->DefineThreshold(
+				$iThreshold,
+				self::DateToSeconds($aCols[$sPrefix.$sThPrefix.'_deadline']),
+				(bool)($aCols[$sPrefix.$sThPrefix.'_passed'] == 1),
+				(bool)($aCols[$sPrefix.$sThPrefix.'_triggered'] == 1),
+				$aCols[$sPrefix.$sThPrefix.'_overrun'],
+				array_key_exists('highlight', $aDefinition) ? $aDefinition['highlight'] : null
+			);
+		}
+
+		return $value;
+	}
+
+	public function GetSQLValues($value)
+	{
+		if ($value instanceOf ormStopWatch)
+		{
+			$aValues = array();
+			$aValues[$this->GetCode().'_timespent'] = $value->GetTimeSpent();
+			$aValues[$this->GetCode().'_started'] = self::SecondsToDate($value->GetStartDate());
+			$aValues[$this->GetCode().'_laststart'] = self::SecondsToDate($value->GetLastStartDate());
+			$aValues[$this->GetCode().'_stopped'] = self::SecondsToDate($value->GetStopDate());
+
+			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+			{
+				$sPrefix = $this->GetCode().'_'.$iThreshold;
+				$aValues[$sPrefix.'_deadline'] = self::SecondsToDate($value->GetThresholdDate($iThreshold));
+				$aValues[$sPrefix.'_passed'] = $value->IsThresholdPassed($iThreshold) ? '1' : '0';
+				$aValues[$sPrefix.'_triggered'] = $value->IsThresholdTriggered($iThreshold) ? '1' : '0';
+				$aValues[$sPrefix.'_overrun'] = $value->GetOverrun($iThreshold);
+			}
+		}
+		else
+		{
+			$aValues = array();
+			$aValues[$this->GetCode().'_timespent'] = '';
+			$aValues[$this->GetCode().'_started'] = '';
+			$aValues[$this->GetCode().'_laststart'] = '';
+			$aValues[$this->GetCode().'_stopped'] = '';
+		}
+		return $aValues;
+	}
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->GetCode().'_timespent'] = 'INT(11) UNSIGNED';
+		$aColumns[$this->GetCode().'_started'] = 'DATETIME';
+		$aColumns[$this->GetCode().'_laststart'] = 'DATETIME';
+		$aColumns[$this->GetCode().'_stopped'] = 'DATETIME';
+		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+		{
+			$sPrefix = $this->GetCode().'_'.$iThreshold;
+			$aColumns[$sPrefix.'_deadline'] = 'DATETIME';
+			$aColumns[$sPrefix.'_passed'] = 'TINYINT(1) UNSIGNED';
+			$aColumns[$sPrefix.'_triggered'] = 'TINYINT(1)';
+			$aColumns[$sPrefix.'_overrun'] = 'INT(11) UNSIGNED';
+		}
+		return $aColumns;
+	}
+
+	public function GetFilterDefinitions()
+	{
+		$aRes = array(
+			$this->GetCode() => new FilterFromAttribute($this),
+			$this->GetCode().'_started' => new FilterFromAttribute($this, '_started'),
+			$this->GetCode().'_laststart' => new FilterFromAttribute($this, '_laststart'),
+			$this->GetCode().'_stopped' => new FilterFromAttribute($this, '_stopped')
+		);
+		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+		{
+			$sPrefix = $this->GetCode().'_'.$iThreshold;
+			$aRes[$sPrefix.'_deadline'] = new FilterFromAttribute($this, '_deadline');
+			$aRes[$sPrefix.'_passed'] = new FilterFromAttribute($this, '_passed');
+			$aRes[$sPrefix.'_triggered'] = new FilterFromAttribute($this, '_triggered');
+			$aRes[$sPrefix.'_overrun'] = new FilterFromAttribute($this, '_overrun');
+		}
+		return $aRes;
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array();
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return '=';
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		return 'true';
+	}
+
+	/**
+	 * @param \ormStopWatch $value
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 *
+	 * @return string
+	 */
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (is_object($value))
+		{
+			return $value->GetAsHTML($this, $oHostObject);
+		}
+		return '';
+	}
+
+	/**
+	 * @param ormStopWatch $value
+	 * @param string $sSeparator
+	 * @param string $sTextQualifier
+	 * @param null $oHostObject
+	 * @param bool $bLocalize
+	 * @param bool $bConvertToPlainText
+	 *
+	 * @return string
+	 */
+	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		return $value->GetTimeSpent();
+	}
+
+	/**
+	 * @param \ormStopWatch $value
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 *
+	 * @return mixed
+	 */
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		return $value->GetTimeSpent();
+	}
+
+	public function ListThresholds()
+	{
+		return $this->Get('thresholds');
+	}
+	
+	public function Fingerprint($value)
+	{
+		$sFingerprint = '';
+		if (is_object($value))
+		{
+			$sFingerprint = $value->GetAsHTML($this);
+		}
+		return $sFingerprint;
+	}
+
+	/**
+	 * To expose internal values: Declare an attribute AttributeSubItem
+	 * and implement the GetSubItemXXXX verbs
+	 *
+	 * @param string $sItemCode
+	 *
+	 * @return array
+	 * @throws \CoreException
+	 */
+	public function GetSubItemSQLExpression($sItemCode)
+	{
+		$sPrefix = $this->GetCode();
+		switch($sItemCode)
+		{
+		case 'timespent':
+			return array('' => $sPrefix.'_timespent');
+		case 'started':
+			return array('' => $sPrefix.'_started');
+		case 'laststart':
+			return array('' => $sPrefix.'_laststart');
+		case 'stopped':
+			return array('' => $sPrefix.'_stopped');
+		}
+
+		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+		{
+			$sThPrefix = $iThreshold.'_';
+			if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
+			{
+				// The current threshold is concerned
+				$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
+				switch($sThresholdCode)
+				{
+				case 'deadline':
+					return array('' => $sPrefix.'_'.$iThreshold.'_deadline');
+				case 'passed':
+					return array('' => $sPrefix.'_'.$iThreshold.'_passed');
+				case 'triggered':
+					return array('' => $sPrefix.'_'.$iThreshold.'_triggered');
+				case 'overrun':
+					return array('' => $sPrefix.'_'.$iThreshold.'_overrun');
+				}
+			}
+		}
+		throw new CoreException("Unknown item code '$sItemCode' for attribute ".$this->GetHostClass().'::'.$this->GetCode());
+	}
+
+	/**
+	 * @param string $sItemCode
+	 * @param \ormStopWatch $value
+	 * @param \DBObject $oHostObject
+	 *
+	 * @return mixed
+	 * @throws \CoreException
+	 */
+	public function GetSubItemValue($sItemCode, $value, $oHostObject = null)
+	{
+		$oStopWatch = $value;
+		switch($sItemCode)
+		{
+		case 'timespent':
+			return $oStopWatch->GetTimeSpent();
+		case 'started':
+			return $oStopWatch->GetStartDate();
+		case 'laststart':
+			return $oStopWatch->GetLastStartDate();
+		case 'stopped':
+			return $oStopWatch->GetStopDate();
+		}
+
+		foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+		{
+			$sThPrefix = $iThreshold.'_';
+			if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
+			{
+				// The current threshold is concerned
+				$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
+				switch($sThresholdCode)
+				{
+				case 'deadline':
+					return $oStopWatch->GetThresholdDate($iThreshold);
+				case 'passed':
+					return $oStopWatch->IsThresholdPassed($iThreshold);
+				case 'triggered':
+					return $oStopWatch->IsThresholdTriggered($iThreshold);
+				case 'overrun':
+					return $oStopWatch->GetOverrun($iThreshold);
+				}
+			}
+		}
+
+		throw new CoreException("Unknown item code '$sItemCode' for attribute ".$this->GetHostClass().'::'.$this->GetCode());
+	}
+
+	protected function GetBooleanLabel($bValue)
+	{
+		$sDictKey = $bValue ? 'yes' : 'no';
+		return Dict::S('BooleanLabel:'.$sDictKey, 'def:'.$sDictKey);
+	}
+
+	public function GetSubItemAsHTMLForHistory($sItemCode, $sValue)
+	{
+		$sHtml = null;
+		switch($sItemCode)
+		{
+		case 'timespent':
+			$sHtml = (int)$sValue ? Str::pure2html(AttributeDuration::FormatDuration($sValue)) : null;
+			break;
+		case 'started':
+		case 'laststart':
+		case 'stopped':
+			$sHtml = (int)$sValue ? date((string)AttributeDateTime::GetFormat(), (int)$sValue) : null;
+			break;
+
+		default:
+			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+			{
+				$sThPrefix = $iThreshold.'_';
+				if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
+				{
+					// The current threshold is concerned
+					$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
+					switch($sThresholdCode)
+					{
+					case 'deadline':
+						$sHtml = (int)$sValue ? date((string)AttributeDateTime::GetFormat(), (int)$sValue) : null;
+						break;
+					case 'passed':
+						$sHtml = $this->GetBooleanLabel((int)$sValue);
+						break;
+					case 'triggered':
+						$sHtml = $this->GetBooleanLabel((int)$sValue);
+						break;
+					case 'overrun':
+						$sHtml = (int)$sValue > 0 ? Str::pure2html(AttributeDuration::FormatDuration((int)$sValue)) : '';
+					}
+				}
+			}
+		}
+		return $sHtml;
+	}
+
+	public function GetSubItemAsPlainText($sItemCode, $value)
+	{
+		$sRet = $value;
+
+		switch ($sItemCode)
+		{
+			case 'timespent':
+				$sRet = AttributeDuration::FormatDuration($value);
+				break;
+			case 'started':
+			case 'laststart':
+			case 'stopped':
+				if (is_null($value))
+				{
+					$sRet = ''; // Undefined
+				}
+				else
+				{
+					$oDateTime = new DateTime();
+					$oDateTime->setTimestamp($value);
+					$oDateTimeFormat = AttributeDateTime::GetFormat();
+					$sRet = $oDateTimeFormat->Format($oDateTime);
+				}
+				break;
+
+			default:
+				foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+				{
+					$sThPrefix = $iThreshold . '_';
+					if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
+					{
+						// The current threshold is concerned
+						$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
+						switch ($sThresholdCode)
+						{
+							case 'deadline':
+								if ($value)
+								{
+									$sDate = date(AttributeDateTime::GetInternalFormat(), $value);
+									$sRet = AttributeDeadline::FormatDeadline($sDate);
+								}
+								else
+								{
+									$sRet = '';
+								}
+								break;
+							case 'passed':
+							case 'triggered':
+								$sRet = $this->GetBooleanLabel($value);
+								break;
+							case 'overrun':
+								$sRet = AttributeDuration::FormatDuration($value);
+								break;
+						}
+					}
+				}
+		}
+		return $sRet;
+	}
+
+	public function GetSubItemAsHTML($sItemCode, $value)
+	{
+		$sHtml = $value;
+
+		switch ($sItemCode)
+		{
+			case 'timespent':
+				$sHtml = Str::pure2html(AttributeDuration::FormatDuration($value));
+				break;
+			case 'started':
+			case 'laststart':
+			case 'stopped':
+				if (is_null($value))
+				{
+					$sHtml = ''; // Undefined
+				}
+				else
+				{
+					$oDateTime = new DateTime();
+					$oDateTime->setTimestamp($value);
+					$oDateTimeFormat = AttributeDateTime::GetFormat();
+					$sHtml = Str::pure2html($oDateTimeFormat->Format($oDateTime));
+				}
+				break;
+
+			default:
+				foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+				{
+					$sThPrefix = $iThreshold . '_';
+					if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
+					{
+						// The current threshold is concerned
+						$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
+						switch ($sThresholdCode)
+						{
+							case 'deadline':
+								if ($value)
+								{
+									$sDate = date(AttributeDateTime::GetInternalFormat(), $value);
+									$sHtml = Str::pure2html(AttributeDeadline::FormatDeadline($sDate));
+								}
+								else
+								{
+									$sHtml = '';
+								}
+								break;
+							case 'passed':
+							case 'triggered':
+								$sHtml = $this->GetBooleanLabel($value);
+								break;
+							case 'overrun':
+								$sHtml = Str::pure2html(AttributeDuration::FormatDuration($value));
+								break;
+						}
+					}
+				}
+		}
+		return $sHtml;
+	}
+
+	public function GetSubItemAsCSV($sItemCode, $value, $sSeparator = ',', $sTextQualifier = '"', $bConvertToPlainText = false)
+	{
+		$sFrom = array("\r\n", $sTextQualifier);
+		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
+		$sEscaped = str_replace($sFrom, $sTo, (string)$value);
+		$sRet = $sTextQualifier.$sEscaped.$sTextQualifier;
+
+		switch($sItemCode)
+		{
+		case 'timespent':
+				$sRet = $sTextQualifier . AttributeDuration::FormatDuration($value) . $sTextQualifier;
+				break;
+		case 'started':
+		case 'laststart':
+		case 'stopped':
+				if ($value !== null)
+				{
+					$oDateTime = new DateTime();
+					$oDateTime->setTimestamp($value);
+					$oDateTimeFormat = AttributeDateTime::GetFormat();
+					$sRet = $sTextQualifier . $oDateTimeFormat->Format($oDateTime) . $sTextQualifier;
+				}
+				break;
+
+		default:
+			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+			{
+				$sThPrefix = $iThreshold.'_';
+				if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
+				{
+					// The current threshold is concerned
+					$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
+					switch($sThresholdCode)
+					{
+						case 'deadline':
+								if ($value != '')
+								{
+									$oDateTime = new DateTime();
+									$oDateTime->setTimestamp($value);
+									$oDateTimeFormat = AttributeDateTime::GetFormat();
+									$sRet = $sTextQualifier . $oDateTimeFormat->Format($oDateTime) . $sTextQualifier;
+								}
+								break;
+
+							case 'passed':
+							case 'triggered':
+								$sRet = $sTextQualifier . $this->GetBooleanLabel($value) . $sTextQualifier;
+								break;
+
+							case 'overrun':
+								$sRet = $sTextQualifier . AttributeDuration::FormatDuration($value) . $sTextQualifier;
+								break;
+						}
+				}
+			}
+		}
+		return $sRet;
+	}
+
+	public function GetSubItemAsXML($sItemCode, $value)
+	{
+		$sRet = Str::pure2xml((string)$value);
+
+		switch($sItemCode)
+		{
+		case 'timespent':
+		case 'started':
+		case 'laststart':
+		case 'stopped':
+				break;
+
+		default:
+			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+			{
+				$sThPrefix = $iThreshold.'_';
+				if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
+				{
+					// The current threshold is concerned
+					$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
+					switch($sThresholdCode)
+					{
+					case 'deadline':
+						break;
+
+					case 'passed':
+					case 'triggered':
+						$sRet = $this->GetBooleanLabel($value);
+						break;
+
+					case 'overrun':
+						break;
+					}
+				}
+			}
+		}
+		return $sRet;
+	}
+
+	/**
+	 * Implemented for the HTML spreadsheet format!
+	 *
+	 * @param string $sItemCode
+	 * @param \ormStopWatch $value
+	 *
+	 * @return false|string
+	 */
+	public function GetSubItemAsEditValue($sItemCode, $value)
+	{
+		$sRet = $value;
+
+		switch($sItemCode)
+		{
+		case 'timespent':
+			break;
+
+		case 'started':
+		case 'laststart':
+		case 'stopped':
+			if (is_null($value))
+			{
+				$sRet = ''; // Undefined
+			}
+			else
+			{
+				$sRet = date((string)AttributeDateTime::GetFormat(), $value);
+			}
+			break;
+
+		default:
+			foreach ($this->ListThresholds() as $iThreshold => $aFoo)
+			{
+				$sThPrefix = $iThreshold.'_';
+				if (substr($sItemCode, 0, strlen($sThPrefix)) == $sThPrefix)
+				{
+					// The current threshold is concerned
+					$sThresholdCode = substr($sItemCode, strlen($sThPrefix));
+					switch($sThresholdCode)
+					{
+					case 'deadline':
+						if ($value)
+						{
+							$sRet = date((string)AttributeDateTime::GetFormat(), $value);
+						}
+						else
+						{
+							$sRet = '';
+						}
+						break;
+					case 'passed':
+					case 'triggered':
+						$sRet = $this->GetBooleanLabel($value);
+						break;
+					case 'overrun':
+						break;
+					}
+				}
+			}
+		}
+		return $sRet;
+	}
+}
+
+/**
+ * View of a subvalue of another attribute
+ * If an attribute implements the verbs GetSubItem.... then it can expose
+ * internal values, each of them being an attribute and therefore they
+ * can be displayed at different times in the object lifecycle, and used for
+ * reporting (as a condition in OQL, or as an additional column in an export)  
+ * Known usages: Stop Watches can expose threshold statuses
+ */
+class AttributeSubItem extends AttributeDefinition
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array('target_attcode', 'item_code'));
+	}
+
+	public function GetParentAttCode() {return $this->Get("target_attcode");} 
+
+	/**
+	 * Helper : get the attribute definition to which the execution will be forwarded	
+	 */	
+	public function GetTargetAttDef()
+	{
+		$sClass = $this->GetHostClass();
+		$oParentAttDef = MetaModel::GetAttributeDef($sClass, $this->Get('target_attcode'));
+		return $oParentAttDef;
+	}
+
+	public function GetEditClass() {return "";}
+	
+	public function GetValuesDef() {return null;}
+
+	static public function IsBasedOnDBColumns() {return true;}
+	static public function IsScalar() {return true;}
+	public function IsWritable() {return false;}
+	public function GetDefaultValue(DBObject $oHostObject = null) {return null;}
+//	public function IsNullAllowed() {return false;}
+
+	static public function LoadInObject() {return false;} // if this verb returns false, then GetValue must be implemented
+
+	/**
+	 * Used by DBOBject::Get()
+	 *
+	 * @param \DBObject $oHostObject
+	 *
+	 * @return \AttributeSubItem
+	 * @throws \CoreException
+	 */
+	public function GetValue($oHostObject)
+	{
+		/** @var \AttributeStopWatch $oParent */
+		$oParent = $this->GetTargetAttDef();
+		$parentValue = $oHostObject->GetStrict($oParent->GetCode());
+		$res = $oParent->GetSubItemValue($this->Get('item_code'), $parentValue, $oHostObject);
+		return $res;
+	}
+
+	// 
+//	protected function ScalarToSQL($value) {return $value;} // format value as a valuable SQL literal (quoted outside)
+
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+	}
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		return array();
+	}
+
+	public function GetFilterDefinitions()
+	{
+		return array($this->GetCode() => new FilterFromAttribute($this));
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array();
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return "=";
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		$sQValue = CMDBSource::Quote($value);
+		switch ($sOpCode)
+		{
+		case '!=':
+			return $this->GetSQLExpr()." != $sQValue";
+			break;
+		case '=':
+		default:
+			return $this->GetSQLExpr()." = $sQValue";
+		}
+	} 
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		$oParent = $this->GetTargetAttDef();
+		$res = $oParent->GetSubItemSQLExpression($this->Get('item_code'));
+		return $res;
+	}
+
+	public function GetAsPlainText($value, $oHostObject = null, $bLocalize = true)
+	{
+		$oParent = $this->GetTargetAttDef();
+		$res = $oParent->GetSubItemAsPlainText($this->Get('item_code'), $value);
+		return $res;
+	}
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		$oParent = $this->GetTargetAttDef();
+		$res = $oParent->GetSubItemAsHTML($this->Get('item_code'), $value);
+		return $res;
+	}
+
+	public function GetAsHTMLForHistory($value, $oHostObject = null, $bLocalize = true)
+	{
+		$oParent = $this->GetTargetAttDef();
+		$res = $oParent->GetSubItemAsHTMLForHistory($this->Get('item_code'), $value);
+		return $res;
+	}
+
+	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		$oParent = $this->GetTargetAttDef();
+		$res = $oParent->GetSubItemAsCSV($this->Get('item_code'), $value, $sSeparator, $sTextQualifier, $bConvertToPlainText);
+		return $res;
+	}
+	
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		$oParent = $this->GetTargetAttDef();
+		$res = $oParent->GetSubItemAsXML($this->Get('item_code'), $value);
+		return $res;
+	}
+
+	/**
+	 * As of now, this function must be implemented to have the value in spreadsheet format
+	 */	 	
+	public function GetEditValue($value, $oHostObj = null)
+	{
+		$oParent = $this->GetTargetAttDef();
+		$res = $oParent->GetSubItemAsEditValue($this->Get('item_code'), $value);
+		return $res;
+	}
+	
+	public function IsPartOfFingerprint()
+	{
+		return false;
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\LabelField';
+	}
+
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+		parent::MakeFormField($oObject, $oFormField);
+
+		// Note : As of today, this attribute is -by nature- only supported in readonly mode, not edition
+		$sAttCode = $this->GetCode();
+		$oFormField->SetCurrentValue(html_entity_decode($oObject->GetAsHTML($sAttCode), ENT_QUOTES, 'UTF-8'));
+		$oFormField->SetReadOnly(true);
+
+		return $oFormField;
+	}
+
+}
+
+/**
+ * One way encrypted (hashed) password
+ */
+class AttributeOneWayPassword extends AttributeDefinition
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("depends_on"));
+	}
+
+	public function GetEditClass() {return "One Way Password";}
+
+	static public function IsBasedOnDBColumns() {return true;}
+	static public function IsScalar() {return true;}
+	public function IsWritable() {return true;}
+	public function GetDefaultValue(DBObject $oHostObject = null) {return "";}
+	public function IsNullAllowed() {return $this->GetOptional("is_null_allowed", false);}
+
+	// Facilitate things: allow the user to Set the value from a string or from an ormPassword (already encrypted)
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		$oPassword = $proposedValue;
+		if (is_object($oPassword))
+		{
+			$oPassword = clone $proposedValue;
+		}
+		else
+		{
+			$oPassword = new ormPassword('', '');
+			$oPassword->SetPassword($proposedValue);
+		}
+		return $oPassword;
+	}
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		if ($sPrefix == '')
+		{
+			$sPrefix = $this->GetCode(); // Warning: AttributeOneWayPassword does not have any sql property so code = sql !
+		}
+		$aColumns = array();
+		// Note: to optimize things, the existence of the attribute is determined by the existence of one column with an empty suffix
+		$aColumns[''] = $sPrefix.'_hash';
+		$aColumns['_salt'] = $sPrefix.'_salt';
+		return $aColumns;
+	}
+
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		if (!array_key_exists($sPrefix, $aCols))
+		{
+			$sAvailable = implode(', ', array_keys($aCols));
+			throw new MissingColumnException("Missing column '$sPrefix' from {$sAvailable}");
+		} 
+		$hashed = isset($aCols[$sPrefix]) ? $aCols[$sPrefix] : '';
+
+		if (!array_key_exists($sPrefix.'_salt', $aCols)) 
+		{
+			$sAvailable = implode(', ', array_keys($aCols));
+			throw new MissingColumnException("Missing column '".$sPrefix."_salt' from {$sAvailable}");
+		} 
+		$sSalt = isset($aCols[$sPrefix.'_salt']) ? $aCols[$sPrefix.'_salt'] : '';
+
+		$value = new ormPassword($hashed, $sSalt);
+		return $value;
+	}
+
+	public function GetSQLValues($value)
+	{
+		// #@# Optimization: do not load blobs anytime
+		//	 As per mySQL doc, selecting blob columns will prevent mySQL from
+		//	 using memory in case a temporary table has to be created
+		//	 (temporary tables created on disk)
+		//	 We will have to remove the blobs from the list of attributes when doing the select
+		//	 then the use of Get() should finalize the load
+		if ($value instanceOf ormPassword)
+		{
+			$aValues = array();
+			$aValues[$this->GetCode().'_hash'] = $value->GetHash();
+			$aValues[$this->GetCode().'_salt'] = $value->GetSalt();
+		}
+		else
+		{
+			$aValues = array();
+			$aValues[$this->GetCode().'_hash'] = '';
+			$aValues[$this->GetCode().'_salt'] = '';
+		}
+		return $aValues;
+	}
+
+	public function GetSQLColumns($bFullSpec = false)
+	{
+		$aColumns = array();
+		$aColumns[$this->GetCode().'_hash'] = 'TINYBLOB';
+		$aColumns[$this->GetCode().'_salt'] = 'TINYBLOB';
+		return $aColumns;
+	}
+
+	public function GetImportColumns()
+	{
+		$aColumns = array();
+		$aColumns[$this->GetCode()] = 'TINYTEXT'.CMDBSource::GetSqlStringColumnDefinition();
+		return $aColumns;
+	}
+
+	public function FromImportToValue($aCols, $sPrefix = '')
+	{
+		if (!isset($aCols[$sPrefix]))
+		{
+			$sAvailable = implode(', ', array_keys($aCols));
+			throw new MissingColumnException("Missing column '$sPrefix' from {$sAvailable}");
+		} 
+		$sClearPwd = $aCols[$sPrefix];
+
+		$oPassword = new ormPassword('', '');
+		$oPassword->SetPassword($sClearPwd);
+		return $oPassword;
+	}
+
+	public function GetFilterDefinitions()
+	{
+		return array();
+		// still not working... see later...
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array();
+	}
+	public function GetBasicFilterLooseOperator()
+	{
+		return '=';
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		return 'true';
+	} 
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (is_object($value))
+		{
+			return $value->GetAsHTML();
+		}
+		return '';
+	}
+
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		return ''; // Not exportable in CSV
+	}
+	
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		return ''; // Not exportable in XML
+	}
+	
+	public function GetValueLabel($sValue, $oHostObj = null)
+	{
+		// Don't display anything in "group by" reports
+		return '*****';
+	}
+	
+}
+
+// Indexed array having two dimensions
+class AttributeTable extends AttributeDBField
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	public function GetEditClass() {return "Table";}
+
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return "LONGTEXT".CMDBSource::GetSqlStringColumnDefinition();
+	}
+
+	public function GetMaxSize()
+	{
+		return null;
+	}
+
+	public function GetNullValue()
+	{
+		return array();
+	} 
+
+	public function IsNull($proposedValue)
+	{
+		return (count($proposedValue) == 0);
+	} 
+
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		return '';
+	}
+
+	// Facilitate things: allow the user to Set the value from a string
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue))
+		{
+			return array();
+		}
+		else if (!is_array($proposedValue))
+		{
+			return array(0 => array(0 => $proposedValue));
+		}
+		return $proposedValue;
+	}
+
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+		try
+		{
+			$value = @unserialize($aCols[$sPrefix.'']);
+			if ($value === false)
+			{
+				$value = $this->MakeRealValue($aCols[$sPrefix.''], null);
+			}
+		}
+		catch(Exception $e)
+		{
+			$value = $this->MakeRealValue($aCols[$sPrefix.''], null);
+		}
+
+		return $value;
+	}
+
+	public function GetSQLValues($value)
+	{
+		$aValues = array();
+		$aValues[$this->Get("sql")] = serialize($value);
+		return $aValues;
+	}
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (!is_array($value))
+		{
+			throw new CoreException('Expecting an array', array('found' => get_class($value)));
+		}
+		if (count($value) == 0)
+		{
+			return "";
+		}
+
+		$sRes = "<TABLE class=\"listResults\">";
+		$sRes .= "<TBODY>";
+		foreach($value as $iRow => $aRawData)
+		{
+			$sRes .= "<TR>";
+			foreach ($aRawData as $iCol => $cell)
+			{
+				// Note: avoid the warning in case the cell is made of an array
+				$sCell = @Str::pure2html((string)$cell);
+				$sCell = str_replace("\n", "<br>\n", $sCell);
+				$sRes .= "<TD>$sCell</TD>";
+			}
+			$sRes .= "</TR>";
+		}
+		$sRes .= "</TBODY>";
+		$sRes .= "</TABLE>";
+		return $sRes;
+	}
+
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		// Not implemented
+		return '';
+	}
+
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (!is_array($value) || count($value) == 0)
+		{
+			return "";
+		}
+
+		$sRes = "";
+		foreach($value as $iRow => $aRawData)
+		{
+			$sRes .= "<row>";
+			foreach ($aRawData as $iCol => $cell)
+			{
+				$sCell = Str::pure2xml((string)$cell);
+				$sRes .= "<cell icol=\"$iCol\">$sCell</cell>";
+			}
+			$sRes .= "</row>";
+		}
+		return $sRes;
+	}
+}
+
+// The PHP value is a hash array, it is stored as a TEXT column
+class AttributePropertySet extends AttributeTable
+{
+	public function GetEditClass() {return "PropertySet";}
+
+	// Facilitate things: allow the user to Set the value from a string
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (!is_array($proposedValue))
+		{
+			return array('?' => (string)$proposedValue);
+		}
+		return $proposedValue;
+	}
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (!is_array($value))
+		{
+			throw new CoreException('Expecting an array', array('found' => get_class($value)));
+		}
+		if (count($value) == 0)
+		{
+			return "";
+		}
+
+		$sRes = "<TABLE class=\"listResults\">";
+		$sRes .= "<TBODY>";
+		foreach($value as $sProperty => $sValue)
+		{
+			if ($sProperty == 'auth_pwd')
+			{
+				$sValue = '*****';
+			}
+			$sRes .= "<TR>";
+			$sCell = str_replace("\n", "<br>\n", Str::pure2html((string)$sValue));
+			$sRes .= "<TD class=\"label\">$sProperty</TD><TD>$sCell</TD>";
+			$sRes .= "</TR>";
+		}
+		$sRes .= "</TBODY>";
+		$sRes .= "</TABLE>";
+		return $sRes;
+	}
+
+	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		if (!is_array($value) || count($value) == 0)
+		{
+			return "";
+		}
+
+		$aRes = array();
+		foreach($value as $sProperty => $sValue)
+		{
+			if ($sProperty == 'auth_pwd')
+			{
+				$sValue = '*****';
+			}
+			$sFrom = array(',', '=');
+			$sTo = array('\,', '\=');
+			$aRes[] = $sProperty.'='.str_replace($sFrom, $sTo, (string)$sValue);
+		}
+		$sRaw = implode(',', $aRes);
+
+		$sFrom = array("\r\n", $sTextQualifier);
+		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
+		$sEscaped = str_replace($sFrom, $sTo, $sRaw);
+		return $sTextQualifier.$sEscaped.$sTextQualifier;
+	}
+
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		if (!is_array($value) || count($value) == 0)
+		{
+			return "";
+		}
+
+		$sRes = "";
+		foreach($value as $sProperty => $sValue)
+		{
+			if ($sProperty == 'auth_pwd')
+			{
+				$sValue = '*****';
+			}
+			$sRes .= "<property id=\"$sProperty\">";
+			$sRes .= Str::pure2xml((string)$sValue);
+			$sRes .= "</property>";
+		}
+		return $sRes;
+	}
+}
+
+/**
+ * The attribute dedicated to the friendly name automatic attribute (not written) 
+ *
+ * @package	 iTopORM
+ */
+
+/**
+ * The attribute dedicated to the friendly name automatic attribute (not written) 
+ *
+ * @package	 iTopORM
+ */
+class AttributeFriendlyName extends AttributeDefinition
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_STRING;
+	public $m_sValue;
+
+	public function __construct($sCode)
+	{
+		$this->m_sCode = $sCode;
+		$aParams = array();
+		$aParams["default_value"] = '';
+		parent::__construct($sCode, $aParams);
+
+		$this->m_sValue = $this->Get("default_value");
+	}
+
+
+	public function GetEditClass() {return "";}
+
+	public function GetValuesDef() {return null;}
+	public function GetPrerequisiteAttributes($sClass = null) {return $this->GetOptional("depends_on", array());}
+
+	static public function IsScalar() {return true;}
+	public function IsNullAllowed() {return false;}
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		if ($sPrefix == '')
+		{
+			$sPrefix = $this->GetCode(); // Warning AttributeComputedFieldVoid does not have any sql property
+		}
+		return array('' => $sPrefix);
+	}
+
+	static public function IsBasedOnOQLExpression() {return true;}
+	public function GetOQLExpression()
+	{
+		return MetaModel::GetNameExpression($this->GetHostClass());
+	}
+
+	public function GetLabel($sDefault = null)
+	{
+		$sLabel = parent::GetLabel('');
+		if (strlen($sLabel) == 0)
+		{
+			$sLabel = Dict::S('Core:FriendlyName-Label');
+		}
+		return $sLabel;
+	}
+	public function GetDescription($sDefault = null)
+	{
+		$sLabel = parent::GetDescription('');
+		if (strlen($sLabel) == 0)
+		{
+			$sLabel = Dict::S('Core:FriendlyName-Description');
+		}
+		return $sLabel;
+	} 
+
+	public function FromSQLToValue($aCols, $sPrefix = '')
+	{
+ 		$sValue = $aCols[$sPrefix];
+		return $sValue;
+	}
+
+	public function IsWritable()
+	{
+		return false;
+	}
+	public function IsMagic()
+	{
+		return true;
+	}
+
+	static public function IsBasedOnDBColumns()
+	{
+		return false;
+	}
+
+	public function SetFixedValue($sValue)
+	{
+		$this->m_sValue = $sValue;
+	}
+	public function GetDefaultValue(DBObject $oHostObject = null)
+	{
+		return $this->m_sValue;
+	}
+
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		return Str::pure2html((string)$sValue);
+	}
+
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		$sFrom = array("\r\n", $sTextQualifier);
+		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
+		$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
+		return $sTextQualifier.$sEscaped.$sTextQualifier;
+	}
+
+	static function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\StringField';
+	}
+
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+		}
+		$oFormField->SetReadOnly(true);
+		parent::MakeFormField($oObject, $oFormField);
+
+		return $oFormField;
+	}
+
+	// Do not display friendly names in the history of change
+	public function DescribeChangeAsHTML($sOldValue, $sNewValue, $sLabel = null)
+	{
+		return '';
+	}
+
+	public function GetFilterDefinitions()
+	{
+		return array($this->GetCode() => new FilterFromAttribute($this));
+	}
+
+	public function GetBasicFilterOperators()
+	{
+		return array("="=>"equals", "!="=>"differs from");
+	}
+
+	public function GetBasicFilterLooseOperator()
+	{
+		return "Contains";
+	}
+
+	public function GetBasicFilterSQLExpr($sOpCode, $value)
+	{
+		$sQValue = CMDBSource::Quote($value);
+		switch ($sOpCode)
+		{
+		case '=':
+		case '!=':
+			return $this->GetSQLExpr()." $sOpCode $sQValue";
+		case 'Contains':
+			return $this->GetSQLExpr()." LIKE ".CMDBSource::Quote("%$value%");
+		case 'NotLike':
+			return $this->GetSQLExpr()." NOT LIKE $sQValue";
+		case 'Like':
+		default:
+			return $this->GetSQLExpr()." LIKE $sQValue";
+		}
+	}
+	
+	public function IsPartOfFingerprint() { return false; }
+}
+
+/**
+ * Holds the setting for the redundancy on a specific relation
+ * Its value is a string, containing either:
+ * - 'disabled'
+ * - 'n', where n is a positive integer value giving the minimum count of items upstream
+ * - 'n%', where n is a positive integer value, giving the minimum as a percentage of the total count of items upstream
+ *
+ * @package	 iTopORM
+ */
+class AttributeRedundancySettings extends AttributeDBField
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static public function ListExpectedParams()
+	{
+		return array('sql', 'relation_code', 'from_class', 'neighbour_id', 'enabled', 'enabled_mode', 'min_up', 'min_up_type', 'min_up_mode');
+	}
+
+	public function GetValuesDef() {return null;} 
+	public function GetPrerequisiteAttributes($sClass = null) {return array();}
+
+	public function GetEditClass() {return "RedundancySetting";}
+	protected function GetSQLCol($bFullSpec = false)
+	{
+		return "VARCHAR(20)"
+			.CMDBSource::GetSqlStringColumnDefinition()
+			.($bFullSpec ? $this->GetSQLColSpec() : '');
+	}
+
+
+	public function GetValidationPattern()
+	{
+		return "^[0-9]{1,3}|[0-9]{1,2}%|disabled$";
+	}
+
+	public function GetMaxSize()
+	{
+		return 20;
+	}
+
+	public function GetDefaultValue(DBObject $oHostObject = null)
+	{
+		$sRet = 'disabled';
+		if ($this->Get('enabled'))
+		{
+			if ($this->Get('min_up_type') == 'count')
+			{
+				$sRet = (string) $this->Get('min_up');
+			}
+			else // percent
+			{
+				$sRet = $this->Get('min_up').'%';
+			}
+		}
+		return $sRet;
+	}
+
+	public function IsNullAllowed()
+	{
+		return false;
+	} 
+
+	public function GetNullValue()
+	{
+		return '';
+	} 
+
+	public function IsNull($proposedValue)
+	{
+		return ($proposedValue == '');
+	} 
+
+	public function MakeRealValue($proposedValue, $oHostObj)
+	{
+		if (is_null($proposedValue)) return '';
+		return (string)$proposedValue;
+	}
+
+	public function ScalarToSQL($value)
+	{
+		if (!is_string($value))
+		{
+			throw new CoreException('Expected the attribute value to be a string', array('found_type' => gettype($value), 'value' => $value, 'class' => $this->GetHostClass(), 'attribute' => $this->GetCode()));
+		}
+		return $value;
+	}
+
+	public function GetRelationQueryData()
+	{
+		foreach (MetaModel::EnumRelationQueries($this->GetHostClass(), $this->Get('relation_code'), false) as $sDummy => $aQueryInfo)
+		{
+			if ($aQueryInfo['sFromClass'] == $this->Get('from_class'))
+			{
+				if ($aQueryInfo['sNeighbour'] == $this->Get('neighbour_id'))
+				{
+					return $aQueryInfo;
+				}
+			}
+		}
+		return array();
+	}
+
+	/**
+	 * Find the user option label
+	 *
+	 * @param string $sUserOption possible values : disabled|cout|percent
+	 * @param string $sDefault
+	 *
+	 * @return string
+	 * @throws \Exception
+	 */
+	public function GetUserOptionFormat($sUserOption, $sDefault = null)
+	{
+		$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/'.$sUserOption, null, true /*user lang*/);
+		if (is_null($sLabel))
+		{
+			// If no default value is specified, let's define the most relevant one for developping purposes
+			if (is_null($sDefault))
+			{
+				$sDefault = str_replace('_', ' ', $this->m_sCode.':'.$sUserOption.'(%1$s)');
+			}
+			// Browse the hierarchy again, accepting default (english) translations
+			$sLabel = $this->SearchLabel('/Attribute:'.$this->m_sCode.'/'.$sUserOption, $sDefault, false);
+		}
+		return $sLabel;
+	}
+
+	/**
+	 * Override to display the value in the GUI
+	 *
+	 * @param string $sValue
+	 * @param \DBObject $oHostObject
+	 * @param bool $bLocalize
+	 *
+	 * @return string
+	 * @throws \CoreException
+	 * @throws \DictExceptionMissingString
+	 */
+	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
+	{
+		$sCurrentOption = $this->GetCurrentOption($sValue);
+		$sClass = $oHostObject ? get_class($oHostObject) : $this->m_sHostClass;
+		return sprintf($this->GetUserOptionFormat($sCurrentOption), $this->GetMinUpValue($sValue), MetaModel::GetName($sClass));
+	}
+
+	public function GetAsCSV($sValue, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		$sFrom = array("\r\n", $sTextQualifier);
+		$sTo = array("\n", $sTextQualifier.$sTextQualifier);
+		$sEscaped = str_replace($sFrom, $sTo, (string)$sValue);
+		return $sTextQualifier.$sEscaped.$sTextQualifier;
+	}
+
+	/**
+	 * Helper to interpret the value, given the current settings and string representation of the attribute	
+	 */	
+	public function IsEnabled($sValue)
+	{
+		if ($this->get('enabled_mode') == 'fixed')
+		{
+			$bRet = $this->get('enabled');
+		}
+		else
+		{
+			$bRet = ($sValue != 'disabled');
+		}
+		return $bRet;
+	}
+
+	/**
+	 * Helper to interpret the value, given the current settings and string representation of the attribute	
+	 */	
+	public function GetMinUpType($sValue)
+	{
+		if ($this->get('min_up_mode') == 'fixed')
+		{
+			$sRet = $this->get('min_up_type');
+		}
+		else
+		{
+			$sRet = 'count';
+			if (substr(trim($sValue), -1, 1) == '%')
+			{
+				$sRet = 'percent';
+			}
+		}
+		return $sRet;
+	}
+
+	/**
+	 * Helper to interpret the value, given the current settings and string representation of the attribute	
+	 */	
+	public function GetMinUpValue($sValue)
+	{
+		if ($this->get('min_up_mode') == 'fixed')
+		{
+			$iRet = (int) $this->Get('min_up');
+		}
+		else
+		{
+			$sRefValue = $sValue;
+			if (substr(trim($sValue), -1, 1) == '%')
+			{
+				$sRefValue = substr(trim($sValue), 0, -1);
+			}
+			$iRet = (int) trim($sRefValue);
+		}
+		return $iRet;
+	}
+
+	/**
+	 * Helper to determine if the redundancy can be viewed/edited by the end-user
+	 */	
+	public function IsVisible()
+	{
+		$bRet = false;
+		if ($this->Get('enabled_mode') == 'fixed')
+		{
+			$bRet = $this->Get('enabled');
+		}
+		elseif ($this->Get('enabled_mode') == 'user')
+		{
+			$bRet = true;
+		}
+		return $bRet;
+	}
+
+	public function IsWritable()
+	{
+		if (($this->Get('enabled_mode') == 'fixed') && ($this->Get('min_up_mode') == 'fixed'))
+		{
+			return false;
+		}
+		return true;
+	}
+
+	/**
+	 * Returns an HTML form that can be read by ReadValueFromPostedForm
+	 */	
+	public function GetDisplayForm($sCurrentValue, $oPage, $bEditMode = false, $sFormPrefix = '')
+	{
+		$sRet = '';
+		$aUserOptions = $this->GetUserOptions($sCurrentValue);
+		if (count($aUserOptions) < 2)
+		{
+			$bEditOption = false;
+		}
+		else
+		{
+			$bEditOption = $bEditMode;
+		}
+		$sCurrentOption = $this->GetCurrentOption($sCurrentValue);
+		foreach($aUserOptions as $sUserOption)
+		{
+			$bSelected = ($sUserOption == $sCurrentOption);
+			$sRet .= '<div>';
+			$sRet .= $this->GetDisplayOption($sCurrentValue, $oPage, $sFormPrefix, $bEditOption, $sUserOption, $bSelected);
+			$sRet .= '</div>';
+		}
+		return $sRet;
+	}
+
+	const USER_OPTION_DISABLED = 'disabled';
+	const USER_OPTION_ENABLED_COUNT = 'count';
+	const USER_OPTION_ENABLED_PERCENT = 'percent';
+
+	/**
+	 * Depending on the xxx_mode parameters, build the list of options that are allowed to the end-user
+	 */	 	
+	protected function GetUserOptions($sValue)
+	{
+		$aRet = array();
+		if ($this->Get('enabled_mode') == 'user')
+		{
+			$aRet[] = self::USER_OPTION_DISABLED;
+		}
+		
+		if ($this->Get('min_up_mode') == 'user')
+		{
+			$aRet[] = self::USER_OPTION_ENABLED_COUNT;
+			$aRet[] = self::USER_OPTION_ENABLED_PERCENT;
+		}
+		else
+		{
+			if ($this->GetMinUpType($sValue) == 'count')
+			{
+				$aRet[] = self::USER_OPTION_ENABLED_COUNT;
+			}
+			else
+			{
+				$aRet[] = self::USER_OPTION_ENABLED_PERCENT;
+			}
+		}
+		return $aRet;
+	}
+
+	/**
+	 * Convert the string representation into one of the existing options	
+	 */	
+	protected function GetCurrentOption($sValue)
+	{
+		$sRet = self::USER_OPTION_DISABLED;
+		if ($this->IsEnabled($sValue))
+		{
+			if ($this->GetMinUpType($sValue) == 'count')
+			{
+				$sRet = self::USER_OPTION_ENABLED_COUNT;
+			}
+			else
+			{
+				$sRet = self::USER_OPTION_ENABLED_PERCENT;
+			}
+		}
+		return $sRet;
+	}
+
+	/**
+	 * Display an option (form, or current value)
+	 *
+	 * @param string $sCurrentValue
+	 * @param \WebPage $oPage
+	 * @param string $sFormPrefix
+	 * @param bool $bEditMode
+	 * @param string $sUserOption
+	 * @param bool $bSelected
+	 *
+	 * @return string
+	 * @throws \CoreException
+	 * @throws \DictExceptionMissingString
+	 * @throws \Exception
+	 */
+	protected function GetDisplayOption($sCurrentValue, $oPage, $sFormPrefix, $bEditMode, $sUserOption, $bSelected = true)
+	{
+		$sRet = '';
+
+		$iCurrentValue = $this->GetMinUpValue($sCurrentValue);
+		if ($bEditMode)
+		{
+			$sValue = null;
+			$sHtmlNamesPrefix = 'rddcy_'.$this->Get('relation_code').'_'.$this->Get('from_class').'_'.$this->Get('neighbour_id');
+			switch ($sUserOption)
+			{
+			case self::USER_OPTION_DISABLED:
+				$sValue = ''; // Empty placeholder
+				break;
+	
+			case self::USER_OPTION_ENABLED_COUNT:
+				if ($bEditMode)
+				{
+					$sName = $sHtmlNamesPrefix.'_min_up_count';
+					$sEditValue = $bSelected ? $iCurrentValue : '';
+					$sValue = '<input class="redundancy-min-up-count" type="string" size="3" name="'.$sName.'" value="'.$sEditValue.'">';
+					// To fix an issue on Firefox: focus set to the option (because the input is within the label for the option)
+					$oPage->add_ready_script("\$('[name=\"$sName\"]').click(function(){var me=this; setTimeout(function(){\$(me).focus();}, 100);});");
+				}
+				else
+				{
+					$sValue = $iCurrentValue;
+				}
+				break;
+	
+			case self::USER_OPTION_ENABLED_PERCENT:
+				if ($bEditMode)
+				{
+					$sName = $sHtmlNamesPrefix.'_min_up_percent';
+					$sEditValue = $bSelected ? $iCurrentValue : '';
+					$sValue = '<input class="redundancy-min-up-percent" type="string" size="3" name="'.$sName.'" value="'.$sEditValue.'">';
+					// To fix an issue on Firefox: focus set to the option (because the input is within the label for the option)
+					$oPage->add_ready_script("\$('[name=\"$sName\"]').click(function(){var me=this; setTimeout(function(){\$(me).focus();}, 100);});");
+				}
+				else
+				{
+					$sValue = $iCurrentValue;
+				}
+				break;
+			}
+			$sLabel = sprintf($this->GetUserOptionFormat($sUserOption), $sValue, MetaModel::GetName($this->GetHostClass()));
+
+			$sOptionName = $sHtmlNamesPrefix.'_user_option';
+			$sOptionId = $sOptionName.'_'.$sUserOption;
+			$sChecked = $bSelected ? 'checked' : '';
+			$sRet = '<input type="radio" name="'.$sOptionName.'" id="'.$sOptionId.'" value="'.$sUserOption.'" '.$sChecked.'> <label for="'.$sOptionId.'">'.$sLabel.'</label>';
+		}
+		else
+		{
+			// Read-only: display only the currently selected option
+			if ($bSelected)
+			{
+				$sRet = sprintf($this->GetUserOptionFormat($sUserOption), $iCurrentValue, MetaModel::GetName($this->GetHostClass()));
+			}
+		}
+		return $sRet;
+	}
+
+	/**
+	 * Makes the string representation out of the values given by the form defined in GetDisplayForm	
+	 */	
+	public function ReadValueFromPostedForm($sFormPrefix)
+	{
+		$sHtmlNamesPrefix = 'rddcy_'.$this->Get('relation_code').'_'.$this->Get('from_class').'_'.$this->Get('neighbour_id');
+
+		$iMinUpCount = (int) utils::ReadPostedParam($sHtmlNamesPrefix.'_min_up_count', null, 'raw_data');
+		$iMinUpPercent = (int) utils::ReadPostedParam($sHtmlNamesPrefix.'_min_up_percent', null, 'raw_data');
+		$sSelectedOption = utils::ReadPostedParam($sHtmlNamesPrefix.'_user_option', null, 'raw_data');
+		switch ($sSelectedOption)
+		{
+		case self::USER_OPTION_ENABLED_COUNT:
+			$sRet = $iMinUpCount;
+			break;
+
+		case self::USER_OPTION_ENABLED_PERCENT:
+			$sRet = $iMinUpPercent.'%';
+			break;
+
+		case self::USER_OPTION_DISABLED:
+		default:
+			$sRet = 'disabled';
+			break;
+		}
+		return $sRet;
+	}
+}
+
+/**
+ * Custom fields managed by an external implementation
+ *
+ * @package     iTopORM
+ */
+class AttributeCustomFields extends AttributeDefinition
+{
+	const SEARCH_WIDGET_TYPE = self::SEARCH_WIDGET_TYPE_RAW;
+
+	static public function ListExpectedParams()
+	{
+		return array_merge(parent::ListExpectedParams(), array("handler_class"));
+	}
+
+	public function GetEditClass() {return "CustomFields";}
+	public function IsWritable() {return true;}
+	static public function LoadFromDB() {return false;} // See ReadValue...
+
+	public function GetDefaultValue(DBObject $oHostObject = null)
+	{
+		return new ormCustomFieldsValue($oHostObject, $this->GetCode());
+	}
+
+	public function GetBasicFilterOperators() {return array();}
+	public function GetBasicFilterLooseOperator() {return '';}
+	public function GetBasicFilterSQLExpr($sOpCode, $value) {return '';}
+
+	/**
+	 * @param DBObject $oHostObject
+	 * @param array|null $aValues
+	 * @return CustomFieldsHandler
+	 */
+	public function GetHandler($aValues = null)
+	{
+		$sHandlerClass = $this->Get('handler_class');
+		$oHandler = new $sHandlerClass($this->GetCode());
+		if (!is_null($aValues))
+		{
+			$oHandler->SetCurrentValues($aValues);
+		}
+		return $oHandler;
+	}
+
+	public function GetPrerequisiteAttributes($sClass = null)
+	{
+		$sHandlerClass = $this->Get('handler_class');
+		return $sHandlerClass::GetPrerequisiteAttributes($sClass);
+	}
+
+	public function GetEditValue($sValue, $oHostObj = null)
+	{
+		return $this->GetForTemplate($sValue, '', $oHostObj, true);
+	}
+
+	/**
+	 * Makes the string representation out of the values given by the form defined in GetDisplayForm
+	 */
+	public function ReadValueFromPostedForm($oHostObject, $sFormPrefix)
+	{
+		$aRawData = json_decode(utils::ReadPostedParam("attr_{$sFormPrefix}{$this->GetCode()}", '{}', 'raw_data'), true);
+		return new ormCustomFieldsValue($oHostObject, $this->GetCode(), $aRawData);
+	}
+
+	public function MakeRealValue($proposedValue, $oHostObject)
+	{
+		if (is_object($proposedValue) && ($proposedValue instanceof ormCustomFieldsValue))
+		{
+			return $proposedValue;
+		}
+		elseif (is_string($proposedValue))
+		{
+			$aValues = json_decode($proposedValue, true);
+			return new ormCustomFieldsValue($oHostObject, $this->GetCode(), $aValues);
+		}
+		elseif (is_array($proposedValue))
+		{
+			return new ormCustomFieldsValue($oHostObject, $this->GetCode(), $proposedValue);
+		}
+		elseif (is_null($proposedValue))
+		{
+			return new ormCustomFieldsValue($oHostObject, $this->GetCode());
+		}
+		throw new Exception('Unexpected type for the value of a custom fields attribute: '.gettype($proposedValue));
+	}
+
+	static public function GetFormFieldClass()
+	{
+		return '\\Combodo\\iTop\\Form\\Field\\SubFormField';
+	}
+
+	/**
+	 * Override to build the relevant form field
+	 *
+	 * When called first, $oFormField is null and will be created (eg. Make). Then when the ::parent is called and the $oFormField is passed, MakeFormField behaves more like a Prepare.
+	 */
+	public function MakeFormField(DBObject $oObject, $oFormField = null)
+	{
+		if ($oFormField === null)
+		{
+			$sFormFieldClass = static::GetFormFieldClass();
+			$oFormField = new $sFormFieldClass($this->GetCode());
+			$oFormField->SetForm($this->GetForm($oObject));
+		}
+		parent::MakeFormField($oObject, $oFormField);
+		
+		return $oFormField;
+	}
+
+	/**
+	 * @param DBObject $oHostObject
+	 * @param null $sFormPrefix
+	 * @return Combodo\iTop\Form\Form
+	 * @throws \Exception
+	 */
+	public function GetForm(DBObject $oHostObject, $sFormPrefix = null)
+	{
+		try
+		{
+			$oValue = $oHostObject->Get($this->GetCode());
+			$oHandler = $this->GetHandler($oValue->GetValues());
+			$sFormId = is_null($sFormPrefix) ? 'cf_'.$this->GetCode() : $sFormPrefix.'_cf_'.$this->GetCode();
+			$oHandler->BuildForm($oHostObject, $sFormId);
+			$oForm = $oHandler->GetForm();
+		}
+		catch (Exception $e)
+		{
+			$oForm = new \Combodo\iTop\Form\Form('');
+			$oField = new \Combodo\iTop\Form\Field\LabelField('');
+			$oField->SetLabel('Custom field error: '.$e->getMessage());
+			$oForm->AddField($oField);
+			$oForm->Finalize();
+		}
+		return $oForm;
+	}
+
+	/**
+	 * Read the data from where it has been stored. This verb must be implemented as soon as LoadFromDB returns false and LoadInObject returns true
+	 * @param $oHostObject
+	 * @return ormCustomFieldsValue
+	 */
+	public function ReadValue($oHostObject)
+	{
+		try
+		{
+			$oHandler = $this->GetHandler();
+			$aValues = $oHandler->ReadValues($oHostObject);
+			$oRet = new ormCustomFieldsValue($oHostObject, $this->GetCode(), $aValues);
+		}
+		catch (Exception $e)
+		{
+			$oRet = new ormCustomFieldsValue($oHostObject, $this->GetCode());
+		}
+		return $oRet;
+	}
+
+	/**
+	 * Record the data (currently in the processing of recording the host object)
+	 * It is assumed that the data has been checked prior to calling Write()
+	 * @param DBObject $oHostObject
+	 * @param ormCustomFieldsValue|null $oValue (null is the default value)
+	 */
+	public function WriteValue(DBObject $oHostObject, ormCustomFieldsValue $oValue = null)
+	{
+		if (is_null($oValue))
+		{
+			$oHandler = $this->GetHandler();
+			$aValues = array();
+		}
+		else
+		{
+			// Pass the values through the form to make sure that they are correct
+			$oHandler = $this->GetHandler($oValue->GetValues());
+			$oHandler->BuildForm($oHostObject, '');
+			$oForm = $oHandler->GetForm();
+			$aValues = $oForm->GetCurrentValues();
+		}
+		return $oHandler->WriteValues($oHostObject, $aValues);
+	}
+
+	/**
+	 * The part of the current attribute in the object's signature, for the supplied value
+	 * @param ormCustomFieldsValue $value The value of this attribute for the object
+	 * @return string The "signature" for this field/attribute
+	 */
+	public function Fingerprint($value)
+	{
+		$oHandler = $this->GetHandler($value->GetValues());
+		return $oHandler->GetValueFingerprint();
+	}
+
+	/**
+	 * Check the validity of the data
+	 * @param DBObject $oHostObject
+	 * @param $value
+	 * @return bool|string true or error message
+	 */
+	public function CheckValue(DBObject $oHostObject, $value)
+	{
+		try
+		{
+			$oHandler = $this->GetHandler($value->GetValues());
+			$oHandler->BuildForm($oHostObject, '');
+			$oForm = $oHandler->GetForm();
+			$oForm->Validate();
+			if ($oForm->GetValid())
+			{
+				$ret = true;
+			}
+			else
+			{
+				$aMessages = array();
+				foreach ($oForm->GetErrorMessages() as $sFieldId => $aFieldMessages)
+				{
+					$aMessages[] = $sFieldId.': '.implode(', ', $aFieldMessages);
+				}
+				$ret = 'Invalid value: '.implode(', ', $aMessages);
+			}
+		}
+		catch (Exception $e)
+		{
+			$ret = $e->getMessage();
+		}
+		return $ret;
+	}
+
+	/**
+	 * Cleanup data upon object deletion (object id still available here)
+	 * @param DBObject $oHostObject
+	 * @return
+	 * @throws \CoreException
+	 */
+	public function DeleteValue(DBObject $oHostObject)
+	{
+		$oValue = $oHostObject->Get($this->GetCode());
+		$oHandler = $this->GetHandler($oValue->GetValues());
+		return $oHandler->DeleteValues($oHostObject);
+	}
+
+	public function GetAsHTML($value, $oHostObject = null, $bLocalize = true)
+	{
+		try
+		{
+			$sRet = $value->GetAsHTML($bLocalize);
+		}
+		catch (Exception $e)
+		{
+			$sRet = 'Custom field error: '.htmlentities($e->getMessage(), ENT_QUOTES, 'UTF-8');
+		}
+		return $sRet;
+	}
+
+	public function GetAsXML($value, $oHostObject = null, $bLocalize = true)
+	{
+		try
+		{
+			$sRet = $value->GetAsXML($bLocalize);
+		}
+		catch (Exception $e)
+		{
+			$sRet = Str::pure2xml('Custom field error: '.$e->getMessage());
+		}
+		return $sRet;
+	}
+
+	public function GetAsCSV($value, $sSeparator = ',', $sTextQualifier = '"', $oHostObject = null, $bLocalize = true, $bConvertToPlainText = false)
+	{
+		try
+		{
+			$sRet = $value->GetAsCSV($sSeparator, $sTextQualifier, $bLocalize, $bConvertToPlainText);
+		}
+		catch (Exception $e)
+		{
+			$sFrom = array("\r\n", $sTextQualifier);
+			$sTo = array("\n", $sTextQualifier.$sTextQualifier);
+			$sEscaped = str_replace($sFrom, $sTo, 'Custom field error: '.$e->getMessage());
+			$sRet = $sTextQualifier.$sEscaped.$sTextQualifier;
+		}
+		return $sRet;
+	}
+
+	/**
+	 * List the available verbs for 'GetForTemplate'
+	 */
+	public function EnumTemplateVerbs()
+	{
+		$sHandlerClass = $this->Get('handler_class');
+		return $sHandlerClass::EnumTemplateVerbs();
+	}
+
+	/**
+	 * Get various representations of the value, for insertion into a template (e.g. in Notifications)
+	 *
+	 * @param $value mixed The current value of the field
+	 * @param $sVerb string The verb specifying the representation of the value
+	 * @param $oHostObject DBObject The object
+	 * @param $bLocalize bool Whether or not to localize the value
+	 *
+	 * @return string
+	 */
+	public function GetForTemplate($value, $sVerb, $oHostObject = null, $bLocalize = true)
+	{
+		try
+		{
+			$sRet = $value->GetForTemplate($sVerb, $bLocalize);
+		}
+		catch (Exception $e)
+		{
+			$sRet = 'Custom field error: '.$e->getMessage();
+		}
+		return $sRet;
+	}
+
+	public function MakeValueFromString($sProposedValue, $bLocalizedValue = false, $sSepItem = null, $sSepAttribute = null, $sSepValue = null, $sAttributeQualifier = null)
+	{
+		return null;
+	}
+
+	/**
+	 * Helper to get a value that will be JSON encoded
+	 * The operation is the opposite to FromJSONToValue
+	 *
+	 * @param $value
+	 *
+	 * @return string
+	 */
+	public function GetForJSON($value)
+	{
+		return null;
+	}
+
+	/**
+	 * Helper to form a value, given JSON decoded data
+	 * The operation is the opposite to GetForJSON
+	 *
+	 * @param string $json
+	 *
+	 * @return array
+	 */
+	public function FromJSONToValue($json)
+	{
+		return null;
+	}
+
+	public function Equals($val1, $val2)
+	{
+		try
+		{
+			$bEquals = $val1->Equals($val2);
+		}
+		catch (Exception $e)
+		{
+			$bEquals = false;
+		}
+		return $bEquals;
+	}
+}
+
+class AttributeArchiveFlag extends AttributeBoolean
+{
+	public function __construct($sCode)
+	{
+		parent::__construct($sCode, array("allowed_values" => null, "sql" => $sCode, "default_value" => false, "is_null_allowed" => false, "depends_on" => array()));
+	}
+	public function RequiresIndex()
+	{
+		return true;
+	}
+	public function CopyOnAllTables()
+	{
+		return true;
+	}
+	public function IsWritable()
+	{
+		return false;
+	}
+	public function IsMagic()
+	{
+		return true;
+	}
+	public function GetLabel($sDefault = null)
+	{
+		$sDefault = Dict::S('Core:AttributeArchiveFlag/Label', $sDefault);
+		return parent::GetLabel($sDefault);
+	}
+	public function GetDescription($sDefault = null)
+	{
+		$sDefault = Dict::S('Core:AttributeArchiveFlag/Label+', $sDefault);
+		return parent::GetDescription($sDefault);
+	}
+}
+class AttributeArchiveDate extends AttributeDate
+{
+	public function GetLabel($sDefault = null)
+	{
+		$sDefault = Dict::S('Core:AttributeArchiveDate/Label', $sDefault);
+		return parent::GetLabel($sDefault);
+	}
+	public function GetDescription($sDefault = null)
+	{
+		$sDefault = Dict::S('Core:AttributeArchiveDate/Label+', $sDefault);
+		return parent::GetDescription($sDefault);
+	}
+}
+
+class AttributeObsolescenceFlag extends AttributeBoolean
+{
+	public function __construct($sCode)
+	{
+		parent::__construct($sCode, array("allowed_values"=>null, "sql"=>$sCode, "default_value"=>"", "is_null_allowed"=>false, "depends_on"=>array()));
+	}
+	public function IsWritable()
+	{
+		return false;
+	}
+	public function IsMagic()
+	{
+		return true;
+	}
+
+	static public function IsBasedOnDBColumns() {return false;}
+	/**
+	 * Returns true if the attribute value is built after other attributes by the mean of an expression (obtained via GetOQLExpression)
+	 * @return bool
+	 */
+	static public function IsBasedOnOQLExpression() {return true;}
+	public function GetOQLExpression()
+	{
+		return MetaModel::GetObsolescenceExpression($this->GetHostClass());
+	}
+
+	public function GetSQLExpressions($sPrefix = '')
+	{
+		return array();
+	}
+	public function GetSQLColumns($bFullSpec = false) {return array();} // returns column/spec pairs (1 in most of the cases), for STRUCTURING (DB creation)
+	public function GetSQLValues($value) {return array();} // returns column/value pairs (1 in most of the cases), for WRITING (Insert, Update)
+
+	public function GetEditClass() {return "";}
+
+	public function GetValuesDef() {return null;}
+	public function GetPrerequisiteAttributes($sClass = null) {return $this->GetOptional("depends_on", array());}
+
+	public function IsDirectField() {return true;}
+	static public function IsScalar() {return true;}
+	public function GetSQLExpr()
+	{
+		return null;
+	}
+
+	public function GetDefaultValue(DBObject $oHostObject = null) {return $this->MakeRealValue("", $oHostObject);}
+	public function IsNullAllowed() {return false;}
+
+	public function GetLabel($sDefault = null)
+	{
+		$sDefault = Dict::S('Core:AttributeObsolescenceFlag/Label', $sDefault);
+		return parent::GetLabel($sDefault);
+	}
+	public function GetDescription($sDefault = null)
+	{
+		$sDefault = Dict::S('Core:AttributeObsolescenceFlag/Label+', $sDefault);
+		return parent::GetDescription($sDefault);
+	}
+}
+
+class AttributeObsolescenceDate extends AttributeDate
+{
+	public function GetLabel($sDefault = null)
+	{
+		$sDefault = Dict::S('Core:AttributeObsolescenceDate/Label', $sDefault);
+		return parent::GetLabel($sDefault);
+	}
+	public function GetDescription($sDefault = null)
+	{
+		$sDefault = Dict::S('Core:AttributeObsolescenceDate/Label+', $sDefault);
+		return parent::GetDescription($sDefault);
+	}
+}
diff --git a/core/ormtagset.class.inc.php b/core/ormtagset.class.inc.php
index 97a57986f..d7e8d2603 100644
--- a/core/ormtagset.class.inc.php
+++ b/core/ormtagset.class.inc.php
@@ -52,7 +52,7 @@ final class ormTagSet
     private $aAdded = array();
 
     /**
-     * @var int[] Removed items
+     * @var DBObject[] Removed items
      */
     private $aRemoved = array();
 
@@ -146,15 +146,17 @@ final class ormTagSet
         return $aValues;
     }
 
-    public function GetLabel()
+	/**
+	 * @return array of tag labels indexed by code
+	 */
+	public function GetTags()
     {
-        $aLabels = array();
-        $aValues = array();
+        $aTags = array();
         foreach ($this->aPreserved as $oTag)
         {
             try
             {
-                $aValues[$oTag->Get('tag_code')] = $oTag->Get('tag_label');
+                $aTags[$oTag->Get('tag_code')] = $oTag->Get('tag_label');
             } catch (CoreException $e)
             {
                 IssueLog::Error($e->getMessage());
@@ -164,18 +166,115 @@ final class ormTagSet
         {
             try
             {
-                $aValues[$oTag->Get('tag_code')] = $oTag->Get('tag_label');
+                $aTags[$oTag->Get('tag_code')] = $oTag->Get('tag_label');
             } catch (CoreException $e)
             {
                 IssueLog::Error($e->getMessage());
             }
         }
-        ksort($aValues);
-        foreach($aValues as $sLabel)
-        {
-            $aLabels[] = $sLabel;
-        }
-        return $aLabels;
+        ksort($aTags);
+        return $aTags;
+    }
+
+	/**
+	 * @return array of tag labels indexed by code for only the added tags
+	 */
+	public function GetAddedTags()
+	{
+		$aTags = array();
+		foreach ($this->aAdded as $oTag)
+		{
+			try
+			{
+				$aTags[$oTag->Get('tag_code')] = $oTag->Get('tag_label');
+			} catch (CoreException $e)
+			{
+				IssueLog::Error($e->getMessage());
+			}
+		}
+		ksort($aTags);
+		return $aTags;
+	}
+
+	/**
+	 * @return array of tag labels indexed by code for only the removed tags
+	 */
+	public function GetRemovedTags()
+	{
+		$aTags = array();
+		foreach ($this->aRemoved as $oTag)
+		{
+			try
+			{
+				$aTags[$oTag->Get('tag_code')] = $oTag->Get('tag_label');
+			} catch (CoreException $e)
+			{
+				IssueLog::Error($e->getMessage());
+			}
+		}
+		ksort($aTags);
+		return $aTags;
+	}
+
+	/** Get the delta with another TagSet
+	 *
+	 *  $aDelta['added] = array of tag labels indexed by code for only the added tags
+	 *  $aDelta['removed'] = array of tag labels indexed by code for only the removed tags
+	 *
+	 * @param \ormTagSet $oOtherTagSet
+	 *
+	 * @return array
+	 *
+	 * @throws \CoreException
+	 * @throws \CoreUnexpectedValue
+	 */
+	public function GetDelta(ormTagSet $oOtherTagSet)
+    {
+		$oTag = new ormTagSet($this->sClass, $this->sAttCode);
+		// Set the initial value
+	    $aOrigTagCodes = $this->GetValue();
+	    $oTag->SetValue($aOrigTagCodes);
+		// now remove everything
+	    foreach($aOrigTagCodes as $sTagCode)
+	    {
+	    	$oTag->RemoveTag($sTagCode);
+	    }
+	    // now add the tags of the other TagSet
+	    foreach($oOtherTagSet->GetValue() as $sTagCode)
+	    {
+	    	$oTag->AddTag($sTagCode);
+	    }
+	    $aDelta = array();
+	    $aDelta['added'] = $oTag->GetAddedTags();
+	    $aDelta['removed'] = $oTag->GetRemovedTags();
+
+	    return $aDelta;
+    }
+
+	/**
+	 * Apply a delta to the current TagSet
+	 *
+	 * @param $aDelta
+	 *
+	 * @throws \CoreException
+	 * @throws \CoreUnexpectedValue
+	 */
+	public function ApplyDelta($aDelta)
+    {
+	    if (isset($aDelta['removed']))
+	    {
+		    foreach($aDelta['removed'] as $sTagCode => $aTagLabel)
+		    {
+			    $this->RemoveTag($sTagCode);
+		    }
+	    }
+	    if (isset($aDelta['added']))
+	    {
+		    foreach($aDelta['added'] as $sTagCode => $aTagLabel)
+		    {
+			    $this->AddTag($sTagCode);
+		    }
+	    }
     }
 
     /**
diff --git a/test/core/ormTagSetTest.php b/test/core/ormTagSetTest.php
index b1bf7fae1..857d13751 100644
--- a/test/core/ormTagSetTest.php
+++ b/test/core/ormTagSetTest.php
@@ -152,4 +152,43 @@ use ormTagSet;
         $oTagSet->RemoveTag('tag2');
         static::assertEquals($oTagSet->GetValue(), array());
     }
+
+    public function testGetDelta()
+    {
+	    $this->CreateTagData('Ticket', 'tagfield', 'tag1', 'First');
+	    $this->CreateTagData('Ticket', 'tagfield', 'tag2', 'Second');
+	    $this->CreateTagData('Ticket', 'tagfield', 'tag3', 'Third');
+	    $this->CreateTagData('Ticket', 'tagfield', 'tag4', 'Fourth');
+
+	    $oTagSet1 = new ormTagSet('Ticket', 'tagfield');
+	    $oTagSet1->SetValue(array('tag1', 'tag2'));
+
+	    $oTagSet2 = new ormTagSet('Ticket', 'tagfield');
+	    $oTagSet2->SetValue(array('tag1', 'tag3', 'tag4'));
+
+		$aDelta = $oTagSet1->GetDelta($oTagSet2);
+	    static::assertCount(2, $aDelta);
+	    static::assertCount(2, $aDelta['added']);
+	    static::assertCount(1, $aDelta['removed']);
+    }
+
+    public function testApplyDelta()
+    {
+	    $this->CreateTagData('Ticket', 'tagfield', 'tag1', 'First');
+	    $this->CreateTagData('Ticket', 'tagfield', 'tag2', 'Second');
+	    $this->CreateTagData('Ticket', 'tagfield', 'tag3', 'Third');
+	    $this->CreateTagData('Ticket', 'tagfield', 'tag4', 'Fourth');
+
+	    $oTagSet1 = new ormTagSet('Ticket', 'tagfield');
+	    $oTagSet1->SetValue(array('tag1', 'tag2'));
+
+	    $oTagSet2 = new ormTagSet('Ticket', 'tagfield');
+	    $oTagSet2->SetValue(array('tag1', 'tag3', 'tag4'));
+
+	    $aDelta = $oTagSet1->GetDelta($oTagSet2);
+
+	    $oTagSet1->ApplyDelta($aDelta);
+
+	    static::assertTrue($oTagSet1->Equals($oTagSet2));
+    }
 }