diff --git a/sources/renderer/bootstrap/bsformrenderer.class.inc.php b/sources/renderer/bootstrap/bsformrenderer.class.inc.php
index dc4b78d9e..633059788 100644
--- a/sources/renderer/bootstrap/bsformrenderer.class.inc.php
+++ b/sources/renderer/bootstrap/bsformrenderer.class.inc.php
@@ -19,8 +19,6 @@
 
 namespace Combodo\iTop\Renderer\Bootstrap;
 
-use \Dict;
-use \MetaModel;
 use \Combodo\iTop\Renderer\FormRenderer;
 use \Combodo\iTop\Form\Form;
 
@@ -31,8 +29,7 @@ use \Combodo\iTop\Form\Form;
  */
 class BsFormRenderer extends FormRenderer
 {
-    const ENUM_RENDER_MODE_EXPLODED = 'exploded';
-    const ENUM_RENDER_MODE_JOINED = 'joined';
+    const DEFAULT_RENDERER_NAMESPACE = 'Combodo\\iTop\\Renderer\\Bootstrap\\FieldRenderer\\';
 
     public function __construct(Form $oForm = null)
     {
@@ -44,189 +41,4 @@ class BsFormRenderer extends FormRenderer
         $this->AddSupportedField('RadioField', 'BsSimpleFieldRenderer');
         $this->AddSupportedField('CheckboxField', 'BsSimpleFieldRenderer');
     }
-
-    /**
-     * Registers a Renderer class for the specified Field class.
-     *
-     * If the Field class is not fully qualified, a default namespace will be prepend (see FormRenderer::AddSupportedField).
-     * If the Renderer clas is not fully qualified, the default "Combodo\iTop\Renderer\Bootstrap\FieldRenderer" will be prepend.
-     *
-     * @param string $sFieldClass
-     * @param string $sRendererClass
-     */
-    public function AddSupportedField($sFieldClass, $sRendererClass)
-    {
-        $sRendererClass = (strpos($sRendererClass, '\\') !== false) ? $sRendererClass : 'Combodo\\iTop\\Renderer\\Bootstrap\\FieldRenderer\\' . $sRendererClass;
-
-        parent::AddSupportedField($sFieldClass, $sRendererClass);
-    }
-
-    public function Render()
-    {
-        $this->InitOutputs();
-
-        foreach ($this->oForm->GetFields() as $oField)
-        {
-            $this->aOutputs[$oField->GetId()] = $this->PrepareOutputForField($oField);
-        }
-        
-        return $this->aOutputs;
-    }
-
-    /**
-     * Renders a field of $oObject identified by its attribute code ($sFieldId).
-     *
-     * $sMode allows to defined if the result must a traditional array
-     * containing the differents parts for the field or a string concataning all
-     * those parts in one html tag.
-     *
-     * Typically, $sMode 'joined' is used when RenderField is called directly from a twig template.
-     * Otherwise, the 'exploded' parameter is used to allow the renderer to optimize the assets.
-     *
-     * $iDesiredFlags is only used with $sMode = 'joined' to set the field flags as an information.
-     *
-     * @param cmdbAbstractObject $oObject
-     * @param string $sFieldId
-     * @param integer $iDesiredFlags
-     * @param string $sMode 'joined'|'exploded'
-     * @return mixed
-     */
-    public function RenderField($oObject, $sFieldId, $iDesiredFlags = OPT_ATT_NORMAL, $sMode = 'joined')
-    {
-        // Building field
-        $oAttDef = MetaModel::GetAttributeDef(get_class($oObject), $sFieldId);
-        $oField = $oAttDef->GetFormField($oObject);
-
-        $aOutput = $this->PrepareOutputForField($oField, $sMode);
-
-        if ($sMode === static::ENUM_RENDER_MODE_JOINED)
-        {
-            $res = '<div class="form_field" data-field-id="' . $oField->GetId() . '" data-field-flags="' . $iDesiredFlags . '">' .
-                        $aOutput['html'] .
-                    '</div>';
-        }
-        else
-        {
-            $res = $aOutput;
-        }
-
-        return $res;
-    }
-
-    /**
-     * Returns the output for the $oField. Output format depends on the $sMode.
-     *
-     * If $sMode = 'exploded', output is an has array with id / html / js_inline / js_files / css_inline / css_files / validators
-     * Else if $sMode = 'joined', output is a string with everything in it
-     *
-     * @param Combodo\iTop\Form\Field\Field $oField
-     * @param string $sMode 'exploded'|'joined'
-     * @return mixed
-     */
-    protected function PrepareOutputForField($oField, $sMode = 'exploded')
-    {
-        $output = array(
-            'id' => $oField->GetId(),
-            'html' => '',
-            'js_inline' => '',
-            'css_inline' => '',
-            'js_files' => array(),
-            'css_files' => array(),
-            'validators' => null
-        );
-
-        $sFieldRendererClass = $this->GetFieldRendererClass($oField);
-        // TODO : We might want to throw an exception instead when there is no renderer for that field
-        if ($sFieldRendererClass !== null)
-        {
-            $oFieldRenderer = new $sFieldRendererClass($oField);
-            $oFieldRenderer->SetEndpoint($this->GetEndpoint());
-
-            $oRenderingOutput = $oFieldRenderer->Render();
-
-            // HTML
-            if ($oRenderingOutput->GetHtml() !== '')
-            {
-                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
-                {
-                    $output['html'] = $oRenderingOutput->GetHtml();
-                }
-                else
-                {
-                    $output['html'] .= $oRenderingOutput->GetHtml();
-                }
-            }
-
-            // JS files
-            foreach ($oRenderingOutput->GetJsFiles() as $sJsFile)
-            {
-                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
-                {
-                    if (!in_array($sJsFile, $output['js_files']))
-                    {
-                        $output['js_files'][] = $sJsFile;
-                    }
-                }
-                else
-                {
-                    $output['html'] .= '<script src="' . $sJsFile . '" type="text/javascript"></script>';
-                }
-            }
-            // JS inline
-            if ($oRenderingOutput->GetJs() !== '')
-            {
-                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
-                {
-                    $output['js_inline'] .= ' ' . $oRenderingOutput->GetJs();
-                }
-                else
-                {
-                    $output['html'] .= '<script type="text/javascript">' . $oRenderingOutput->GetJs() . '</script>';
-                }
-            }
-
-            // CSS files
-            foreach ($oRenderingOutput->GetCssFiles() as $sCssFile)
-            {
-                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
-                {
-                    if (!in_array($sCssFile, $output['css_files']))
-                    {
-                    $output['css_files'][] = $sCssFile;
-                    }
-                }
-                else
-                {
-                    $output['html'] .= '<link href="' . $sCssFile . '" rel="stylesheet" />';
-                }
-            }
-            // CSS inline
-            if ($oRenderingOutput->GetCss() !== '')
-            {
-                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
-                {
-                    $output['css_inline'] .= ' ' . $oRenderingOutput->GetCss();
-                }
-                else
-                {
-                    $output['html'] .= '<style>' . $oRenderingOutput->GetCss() . '</style>';
-                }
-            }
-
-            // Validators
-            foreach ($oField->GetValidators() as $oValidator)
-            {
-                $output['validators'][$oValidator::GetName()] = array(
-                    'reg_exp' => $oValidator->GetRegExp(),
-                    'message' => Dict::S($oValidator->GetErrorMessage())
-                );
-            }
-
-            // Subfields
-            // TODO
-        }
-
-        return $output;
-    }
-
 }
diff --git a/sources/renderer/formrenderer.class.inc.php b/sources/renderer/formrenderer.class.inc.php
index 966b44aea..5251a248c 100644
--- a/sources/renderer/formrenderer.class.inc.php
+++ b/sources/renderer/formrenderer.class.inc.php
@@ -19,6 +19,7 @@
 
 namespace Combodo\iTop\Renderer;
 
+use \Dict;
 use \Combodo\iTop\Form\Form;
 
 /**
@@ -28,6 +29,10 @@ use \Combodo\iTop\Form\Form;
  */
 abstract class FormRenderer
 {
+    const ENUM_RENDER_MODE_EXPLODED = 'exploded';
+    const ENUM_RENDER_MODE_JOINED = 'joined';
+    const DEFAULT_RENDERER_NAMESPACE = '';
+
     protected $oForm;
     protected $sEndpoint;
     protected $aSupportedFields;
@@ -115,6 +120,7 @@ abstract class FormRenderer
         return $this->aOutputs;
     }
 
+
     /**
      * Registers a Renderer class for the specified Field class.
      * 
@@ -127,6 +133,7 @@ abstract class FormRenderer
     public function AddSupportedField($sFieldClass, $sRendererClass)
     {
         $sFieldClass = (strpos($sFieldClass, '\\') !== false) ? $sFieldClass : 'Combodo\\iTop\\Form\\Field\\' . $sFieldClass;
+        $sRendererClass = (strpos($sRendererClass, '\\') !== false) ? $sRendererClass : static::DEFAULT_RENDERER_NAMESPACE . $sRendererClass;
 
         $this->aSupportedFields[$sFieldClass] = $sRendererClass;
 
@@ -139,5 +146,131 @@ abstract class FormRenderer
         return $this;
     }
 
-    abstract public function Render();
+    public function Render()
+    {
+        $this->InitOutputs();
+
+        foreach ($this->oForm->GetFields() as $oField)
+        {
+            $this->aOutputs[$oField->GetId()] = $this->PrepareOutputForField($oField);
+        }
+
+        return $this->aOutputs;
+    }
+
+    /**
+     * Returns the output for the $oField. Output format depends on the $sMode.
+     *
+     * If $sMode = 'exploded', output is an has array with id / html / js_inline / js_files / css_inline / css_files / validators
+     * Else if $sMode = 'joined', output is a string with everything in it
+     *
+     * @param Combodo\iTop\Form\Field\Field $oField
+     * @param string $sMode 'exploded'|'joined'
+     * @return mixed
+     */
+    protected function PrepareOutputForField($oField, $sMode = 'exploded')
+    {
+        $output = array(
+            'id' => $oField->GetId(),
+            'html' => '',
+            'js_inline' => '',
+            'css_inline' => '',
+            'js_files' => array(),
+            'css_files' => array(),
+            'validators' => null
+        );
+
+        $sFieldRendererClass = $this->GetFieldRendererClass($oField);
+        // TODO : We might want to throw an exception instead when there is no renderer for that field
+        if ($sFieldRendererClass !== null)
+        {
+            $oFieldRenderer = new $sFieldRendererClass($oField);
+            $oFieldRenderer->SetEndpoint($this->GetEndpoint());
+
+            $oRenderingOutput = $oFieldRenderer->Render();
+
+            // HTML
+            if ($oRenderingOutput->GetHtml() !== '')
+            {
+                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
+                {
+                    $output['html'] = $oRenderingOutput->GetHtml();
+                }
+                else
+                {
+                    $output['html'] .= $oRenderingOutput->GetHtml();
+                }
+            }
+
+            // JS files
+            foreach ($oRenderingOutput->GetJsFiles() as $sJsFile)
+            {
+                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
+                {
+                    if (!in_array($sJsFile, $output['js_files']))
+                    {
+                        $output['js_files'][] = $sJsFile;
+                    }
+                }
+                else
+                {
+                    $output['html'] .= '<script src="' . $sJsFile . '" type="text/javascript"></script>';
+                }
+            }
+            // JS inline
+            if ($oRenderingOutput->GetJs() !== '')
+            {
+                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
+                {
+                    $output['js_inline'] .= ' ' . $oRenderingOutput->GetJs();
+                }
+                else
+                {
+                    $output['html'] .= '<script type="text/javascript">' . $oRenderingOutput->GetJs() . '</script>';
+                }
+            }
+
+            // CSS files
+            foreach ($oRenderingOutput->GetCssFiles() as $sCssFile)
+            {
+                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
+                {
+                    if (!in_array($sCssFile, $output['css_files']))
+                    {
+                        $output['css_files'][] = $sCssFile;
+                    }
+                }
+                else
+                {
+                    $output['html'] .= '<link href="' . $sCssFile . '" rel="stylesheet" />';
+                }
+            }
+            // CSS inline
+            if ($oRenderingOutput->GetCss() !== '')
+            {
+                if ($sMode === static::ENUM_RENDER_MODE_EXPLODED)
+                {
+                    $output['css_inline'] .= ' ' . $oRenderingOutput->GetCss();
+                }
+                else
+                {
+                    $output['html'] .= '<style>' . $oRenderingOutput->GetCss() . '</style>';
+                }
+            }
+
+            // Validators
+            foreach ($oField->GetValidators() as $oValidator)
+            {
+                $output['validators'][$oValidator::GetName()] = array(
+                    'reg_exp' => $oValidator->GetRegExp(),
+                    'message' => Dict::S($oValidator->GetErrorMessage())
+                );
+            }
+
+            // Subfields
+            // TODO
+        }
+
+        return $output;
+    }
 }