diff --git a/application/ui.extkeywidget.class.inc.php b/application/ui.extkeywidget.class.inc.php
index 2e40e8844..05a9877a5 100644
--- a/application/ui.extkeywidget.class.inc.php
+++ b/application/ui.extkeywidget.class.inc.php
@@ -183,6 +183,16 @@ class UIExtKeyWidget
 			array_push($aOptions,$aOption);
 
 			$oAllowedValues->Rewind();
+			$bAddingValue=false;
+
+			$aComplementAttributeSpec = MetaModel::GetComplementAttributeSpec($oAllowedValues->GetClass());
+			$sFormatAdditionalField = $aComplementAttributeSpec[0];
+			$aAdditionalField = $aComplementAttributeSpec[1];
+
+			if (count($aAdditionalField)>0)
+			{
+				$bAddingValue=true;
+			}
 			while($oObj = $oAllowedValues->Fetch())
 			{
 				$aOption=[];
@@ -213,6 +223,15 @@ EOF
 				if ($oObj->IsObsolete()){
 					$aOption['obsolescence_flag'] ="1";
 				}
+				if ($bAddingValue)
+				{
+					$aArguments = [];
+					foreach ($aAdditionalField as $sAdditionalField)
+					{
+						array_push($aArguments,$oObj->Get($sAdditionalField));
+					}
+					$aOption['additional_field'] = vsprintf($sFormatAdditionalField, $aArguments);
+				}
 				array_push($aOptions,$aOption);
 			}
 			$sHTMLValue .= "<select title=\"$sHelpText\" name=\"{$sAttrFieldPrefix}{$sFieldName}\" id=\"$this->iId\"></select>";
@@ -715,7 +734,6 @@ EOF
 
         // Current extkey value, so we can display event if it is not available anymore (eg. archived).
         $iCurrentExtKeyId = (is_null($oObj) || $this->sAttCode === '') ? 0 : $oObj->Get($this->sAttCode);
-
 		$oValuesSet = new ValueSetObjects($sFilter, 'friendlyname'); // Bypass GetName() to avoid the encoding by htmlentities
 		$iMax = 150;
 		$oValuesSet->SetLimit($iMax);
@@ -755,7 +773,14 @@ EOF
 			    $aJsonMap = array();
 			    foreach ($aValues as $sKey => $aValue)
                 {
-                    $aJsonMap[] = array('value' => $sKey, 'label' => $aValue['label'], 'obsolescence_flag' => $aValue['obsolescence_flag']);
+                    if ($aValue['additional_field'] != '')
+                    {
+	                    $aJsonMap[] = array('value' => $sKey, 'label' => $aValue['label'], 'obsolescence_flag' => $aValue['obsolescence_flag'], 'additional_field' => $aValue['additional_field']);
+                    }
+                    else
+                    {
+	                    $aJsonMap[] = array('value' => $sKey, 'label' => $aValue['label'], 'obsolescence_flag' => $aValue['obsolescence_flag']);
+                    }
                 }
 
 			    $oP->SetContentType('application/json');
diff --git a/core/metamodel.class.php b/core/metamodel.class.php
index 0fd59f580..d658e8c2b 100644
--- a/core/metamodel.class.php
+++ b/core/metamodel.class.php
@@ -748,7 +748,47 @@ abstract class MetaModel
 			return array('%1$s', array($nameRawSpec));
 		}
 	}
-
+	/**
+	 * @param string $sClass
+	 *
+	 * @return array
+	 * @throws \CoreException
+	 * @throws \DictExceptionMissingString
+	 */
+	final static public function GetComplementAttributeSpec($sClass)
+	{
+		self::_check_subclass($sClass);
+		$nameRawSpec = self::$m_aClassParams[$sClass]["name_complement_for_select"];
+		if (is_array($nameRawSpec))
+		{
+			$sFormat = Dict::S("Class:$sClass/ComplementForSelect", '');
+			if (strlen($sFormat) == 0)
+			{
+				// Default to "%1$s %2$s..."
+				for($i = 1; $i <= count($nameRawSpec); $i++)
+				{
+					if (empty($sFormat))
+					{
+						$sFormat .= '%'.$i.'$s';
+					}
+					else
+					{
+						$sFormat .= ' %'.$i.'$s';
+					}
+				}
+			}
+			return array($sFormat, $nameRawSpec);
+		}
+		elseif (empty($nameRawSpec))
+		{
+			return array($sClass, array());
+		}
+		else
+		{
+			// string -> attcode
+			return array('%1$s', array($nameRawSpec));
+		}
+	}
 	/**
 	 * Get the friendly name expression for a given class
 	 *
diff --git a/core/valuesetdef.class.inc.php b/core/valuesetdef.class.inc.php
index 0c1c28a84..3da211cee 100644
--- a/core/valuesetdef.class.inc.php
+++ b/core/valuesetdef.class.inc.php
@@ -349,11 +349,11 @@ class ValueSetObjects extends ValueSetDefinition
 		$this->m_bSort = $bSort;
 	}
 
-	public function GetValuesForAutocomplete($aArgs, $sContains = '', $sOperation = 'contains', $aAdditionalFields = array())
+	public function GetValuesForAutocomplete($aArgs, $sContains = '', $sOperation = 'contains')
 	{
 		if (!$this->m_bIsLoaded || ($sContains != $this->m_sContains) || ($sOperation != $this->m_sOperation))
 		{
-			$this->LoadValuesForAutocomplete($aArgs, $sContains, $sOperation, $aAdditionalFields);
+			$this->LoadValuesForAutocomplete($aArgs, $sContains, $sOperation);
 			$this->m_bIsLoaded = true;
 		}
 		// The results are already filtered and sorted (on friendly name)
@@ -370,7 +370,7 @@ class ValueSetObjects extends ValueSetDefinition
 	 * @throws \CoreException
 	 * @throws \OQLException
 	 */
-	protected function LoadValuesForAutocomplete($aArgs, $sContains = '', $sOperation = 'contains', $aAdditionalFields = array())
+	protected function LoadValuesForAutocomplete($aArgs, $sContains = '', $sOperation = 'contains')
 	{
 		$this->m_sContains = $sContains;
 		$this->m_sOperation = $sOperation;
@@ -386,6 +386,7 @@ class ValueSetObjects extends ValueSetDefinition
 			$oFilter = DBObjectSearch::FromOQL($this->m_sFilterExpr);
 			$oFilter->SetShowObsoleteData(utils::ShowObsoleteData());
 		}
+
 		if (!$oFilter) return false;
 		if (!is_null($this->m_oExtraCondition))
 		{
@@ -399,7 +400,7 @@ class ValueSetObjects extends ValueSetDefinition
 			}
 		}
 
-		$oExpression = DBObjectSearch::GetPolymorphicExpression($oFilter->GetClass(), 'friendlyname');
+		//$oExpression = DBObjectSearch::GetPolymorphicExpression($oFilter->GetClass(), 'friendlyname');
 		$sClass = $oFilter->GetClass();
 
 		switch ($sOperation)
@@ -454,7 +455,16 @@ class ValueSetObjects extends ValueSetDefinition
 		{
 			$aAttToLoad = array($oFilter->GetClassAlias() => array($this->m_sValueAttCode));
 		}
-		$aAttToLoad=array_merge($aAttToLoad,$aAdditionalFields);
+
+		$aComplementAttributeSpec = MetaModel::GetComplementAttributeSpec($sClass);
+		$sFormatAdditionalField = $aComplementAttributeSpec[0];
+		$aAdditionalField =  $aComplementAttributeSpec[1];
+
+		if (count($aAdditionalField)>0)
+		{
+			$aAttToLoad = array_merge ($aAttToLoad, [$oFilter->GetClassAlias() => $aAdditionalField]);
+		}
+
 		$oObjects->OptimizeColumnLoad($aAttToLoad);
 		while ($oObject = $oObjects->Fetch())
 		{
@@ -475,9 +485,18 @@ class ValueSetObjects extends ValueSetDefinition
 			{
 				$aData['obsolescence_flag']='0';
 			}
-			foreach ($aAdditionalFields as $sFieldName)
+			if (count($aAdditionalField)>0)
 			{
-				$aData[$sFieldName] = $oObject->Get($sFieldName);
+				$aArguments = [];
+				foreach ($aAdditionalField as $sAdditionalField)
+				{
+					array_push ($aArguments,$oObject->Get($sAdditionalField));
+				}
+				$aData['additional_field'] = vsprintf($sFormatAdditionalField, $aArguments);
+			}
+			else
+			{
+				$aData['additional_field']='';
 			}
 			$this->m_aValues[$oObject->GetKey()] = $aData;
 		}
diff --git a/js/extkeywidget.js b/js/extkeywidget.js
index a64d14e5e..e3f670135 100644
--- a/js/extkeywidget.js
+++ b/js/extkeywidget.js
@@ -61,6 +61,10 @@ function ExtKeyWidget(id, sTargetClass, sFilter, sTitle, bSelectMode, oWizHelper
 						{
 							val = item.label;
 						}
+						if (item.additional_field != undefined )
+						{
+							val = val+'<br><i>'+item.additional_field+'</i>';
+						}
 						return $("<div>")
 							.append(val);
 					}
@@ -145,9 +149,13 @@ function ExtKeyWidget(id, sTargetClass, sFilter, sTitle, bSelectMode, oWizHelper
 			{
 				val = ' <span class="object-ref-icon fas fa-eye-slash object-obsolete fa-1x fa-fw"></span>'+val;
 			}
-			val='<d>'+val+'</d>';
+			if (item.additional_field != undefined )
+			{
+				val = val+'<br><i>'+item.additional_field+'</i>';
+			}
+
 			return $("<li>")
-				.append(val)
+				.append("<d>"+val+"</d>")
 				.appendTo(ul);
 		};
 
diff --git a/setup/compiler.class.inc.php b/setup/compiler.class.inc.php
index 028cf2131..bcf6a28a6 100644
--- a/setup/compiler.class.inc.php
+++ b/setup/compiler.class.inc.php
@@ -1140,6 +1140,33 @@ EOF
 			}
 		}
 
+		if ($oAdditionalValueForSelect = $oProperties->GetOptionalElement('complement_for_select'))
+		{
+			$oNameAttributes = $oAdditionalValueForSelect->GetUniqueElement('attributes');
+			/** @var \DOMNodeList $oAttributes */
+			$oAttributes = $oNameAttributes->getElementsByTagName('attribute');
+			$aNameAttCodes = array();
+			/** @var \MFElement $oAttribute */
+			foreach($oAttributes as $oAttribute)
+			{
+				$aNameAttCodes[] = $oAttribute->getAttribute('id');
+			}
+			if (count($aNameAttCodes) > 0)
+			{
+				// New style...
+				$sNameAttCode = "array('".implode("', '", $aNameAttCodes)."')";
+			}
+			else
+			{
+				$sNameAttCode = "''";
+			}
+		}
+		else
+		{
+			$sNameAttCode = "''";
+		}
+		$aClassParams['name_complement_for_select'] = $sNameAttCode;
+
 		if ($oUniquenessRules = $oProperties->GetOptionalElement('uniqueness_rules'))
 		{
 			$aUniquenessRules = array();