Attachment 242320 Details for Bug 432986 – Draft of a patch that enables EMF's native child extender mechanism

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[patch] Draft of a patch that enables EMF's native child extender mechanism

childExtender.patch (text/plain), 135.26 KB, created by Pierre-Charles David

on 2014-04-25 05:36:28 EDT

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Description:

Filename:

MIME Type:

Creator: Pierre-Charles David

Created: 2014-04-25 05:36:28 EDT

Size: 135.26 KB

patch

obsolete

>diff --git a/plugins/org.eclipse.sirius.diagram.ui/plugin.xml b/plugins/org.eclipse.sirius.diagram.ui/plugin.xml
>index 208b235..c21eeeb 100644
>--- a/plugins/org.eclipse.sirius.diagram.ui/plugin.xml
>+++ b/plugins/org.eclipse.sirius.diagram.ui/plugin.xml
>@@ -1788,6 +1788,13 @@
>                org.eclipse.emf.edit.provider.IItemPropertySource"/>
>    </extension>
> 
>+   <extension point="org.eclipse.emf.edit.childCreationExtenders">
>+      
>+      <extender
>+            uri="http://www.eclipse.org/sirius/description/1.1.0"
>+            class="org.eclipse.sirius.diagram.description.provider.DescriptionItemProviderAdapterFactory$DescriptionChildCreationExtender"/>
>+   </extension>
>+
>    <extension point="org.eclipse.emf.edit.itemProviderAdapterFactories">
>       
>       <factory
>@@ -1814,6 +1821,16 @@
>                org.eclipse.emf.edit.provider.IItemPropertySource"/>
>    </extension>
> 
>+   <extension point="org.eclipse.emf.edit.childCreationExtenders">
>+      
>+      <extender
>+            uri="http://www.eclipse.org/sirius/description/1.1.0"
>+            class="org.eclipse.sirius.diagram.description.tool.provider.ToolItemProviderAdapterFactory$DescriptionChildCreationExtender"/>
>+      <extender
>+            uri="http://www.eclipse.org/sirius/description/tool/1.1.0"
>+            class="org.eclipse.sirius.diagram.description.tool.provider.ToolItemProviderAdapterFactory$ToolChildCreationExtender"/>
>+   </extension>
>+
>    <extension point="org.eclipse.emf.edit.itemProviderAdapterFactories">
>       
>       <factory
>diff --git a/plugins/org.eclipse.sirius.diagram.ui/src-gen/org/eclipse/sirius/diagram/description/provider/DescriptionItemProviderAdapterFactory.java b/plugins/org.eclipse.sirius.diagram.ui/src-gen/org/eclipse/sirius/diagram/description/provider/DescriptionItemProviderAdapterFactory.java
>index e26d6ea..9cfa3d3 100644
>--- a/plugins/org.eclipse.sirius.diagram.ui/src-gen/org/eclipse/sirius/diagram/description/provider/DescriptionItemProviderAdapterFactory.java
>+++ b/plugins/org.eclipse.sirius.diagram.ui/src-gen/org/eclipse/sirius/diagram/description/provider/DescriptionItemProviderAdapterFactory.java
>@@ -13,14 +13,20 @@ package org.eclipse.sirius.diagram.description.provider;
> 
> import java.util.ArrayList;
> import java.util.Collection;
>+import java.util.List;
> 
> import org.eclipse.emf.common.notify.Adapter;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.notify.Notifier;
>+import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.ecore.EObject;
>+import org.eclipse.emf.edit.command.CommandParameter;
>+import org.eclipse.emf.edit.domain.EditingDomain;
> import org.eclipse.emf.edit.provider.ChangeNotifier;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
> import org.eclipse.emf.edit.provider.IChangeNotifier;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IDisposable;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
>@@ -28,7 +34,13 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.INotifyChangedListener;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
>+import org.eclipse.sirius.diagram.description.DescriptionFactory;
> import org.eclipse.sirius.diagram.description.util.DescriptionAdapterFactory;
>+import org.eclipse.sirius.diagram.ui.provider.DiagramUIPlugin;
>+import org.eclipse.sirius.viewpoint.description.DecorationDescriptionsSet;
>+import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>+import org.eclipse.sirius.viewpoint.description.Viewpoint;
>+import org.eclipse.sirius.viewpoint.description.util.DescriptionSwitch;
> 
> /**
>  * This is the factory that is used to provide the interfaces needed to support
>@@ -640,4 +652,106 @@ public class DescriptionItemProviderAdapterFactory extends DescriptionAdapterFac
>             additionalLayerItemProvider.dispose();
>     }
> 
>+    /**
>+     * A child creation extender for the {@link DescriptionPackage}.  
>+     * 
>+     * @generated
>+     */
>+    public static class DescriptionChildCreationExtender implements IChildCreationExtender {
>+        /**
>+         * The switch for creating child descriptors specific to each extended
>+         * class.  
>+         * 
>+         * @generated
>+         */
>+        protected static class CreationSwitch extends DescriptionSwitch<Object> {
>+            /**
>+             * The child descriptors being populated. 
>+             * 
>+             * 
>+             * @generated
>+             */
>+            protected List<Object> newChildDescriptors;
>+
>+            /**
>+             * The domain in which to create the children.  
>+             * 
>+             * @generated
>+             */
>+            protected EditingDomain editingDomain;
>+
>+            /**
>+             * Creates the a switch for populating child descriptors in the
>+             * given domain.  
>+             * 
>+             * @generated
>+             */
>+            CreationSwitch(List<Object> newChildDescriptors, EditingDomain editingDomain) {
>+                this.newChildDescriptors = newChildDescriptors;
>+                this.editingDomain = editingDomain;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseViewpoint(Viewpoint object) {
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.VIEWPOINT__OWNED_REPRESENTATIONS, DescriptionFactory.eINSTANCE.createDiagramDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.VIEWPOINT__OWNED_REPRESENTATIONS, DescriptionFactory.eINSTANCE.createDiagramImportDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.VIEWPOINT__OWNED_REPRESENTATION_EXTENSIONS, DescriptionFactory.eINSTANCE.createDiagramExtensionDescription()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseDecorationDescriptionsSet(DecorationDescriptionsSet object) {
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.DECORATION_DESCRIPTIONS_SET__DECORATION_DESCRIPTIONS,
>+                        DescriptionFactory.eINSTANCE.createMappingBasedDecoration()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            protected CommandParameter createChildParameter(Object feature, Object child) {
>+                return new CommandParameter(null, feature, child);
>+            }
>+
>+        }
>+
>+        /**
>+         *  
>+         * 
>+         * @generated
>+         */
>+        public Collection<Object> getNewChildDescriptors(Object object, EditingDomain editingDomain) {
>+            ArrayList<Object> result = new ArrayList<Object>();
>+            new CreationSwitch(result, editingDomain).doSwitch((EObject) object);
>+            return result;
>+        }
>+
>+        /**
>+         *  
>+         * 
>+         * @generated
>+         */
>+        public ResourceLocator getResourceLocator() {
>+            return DiagramUIPlugin.INSTANCE;
>+        }
>+    }
>+
> }
>diff --git a/plugins/org.eclipse.sirius.diagram.ui/src-gen/org/eclipse/sirius/diagram/description/tool/provider/ToolItemProviderAdapterFactory.java b/plugins/org.eclipse.sirius.diagram.ui/src-gen/org/eclipse/sirius/diagram/description/tool/provider/ToolItemProviderAdapterFactory.java
>index d5de17f..9616cca 100644
>--- a/plugins/org.eclipse.sirius.diagram.ui/src-gen/org/eclipse/sirius/diagram/description/tool/provider/ToolItemProviderAdapterFactory.java
>+++ b/plugins/org.eclipse.sirius.diagram.ui/src-gen/org/eclipse/sirius/diagram/description/tool/provider/ToolItemProviderAdapterFactory.java
>@@ -13,14 +13,20 @@ package org.eclipse.sirius.diagram.description.tool.provider;
> 
> import java.util.ArrayList;
> import java.util.Collection;
>+import java.util.List;
> 
> import org.eclipse.emf.common.notify.Adapter;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.notify.Notifier;
>+import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.ecore.EObject;
>+import org.eclipse.emf.edit.command.CommandParameter;
>+import org.eclipse.emf.edit.domain.EditingDomain;
> import org.eclipse.emf.edit.provider.ChangeNotifier;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
> import org.eclipse.emf.edit.provider.IChangeNotifier;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IDisposable;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
>@@ -28,7 +34,20 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.INotifyChangedListener;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
>+import org.eclipse.sirius.diagram.description.tool.ToolFactory;
> import org.eclipse.sirius.diagram.description.tool.util.ToolAdapterFactory;
>+import org.eclipse.sirius.diagram.ui.provider.DiagramUIPlugin;
>+import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>+import org.eclipse.sirius.viewpoint.description.Environment;
>+import org.eclipse.sirius.viewpoint.description.tool.ContainerModelOperation;
>+import org.eclipse.sirius.viewpoint.description.tool.InitEdgeCreationOperation;
>+import org.eclipse.sirius.viewpoint.description.tool.InitialContainerDropOperation;
>+import org.eclipse.sirius.viewpoint.description.tool.InitialNodeCreationOperation;
>+import org.eclipse.sirius.viewpoint.description.tool.InitialOperation;
>+import org.eclipse.sirius.viewpoint.description.tool.SwitchChild;
>+import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>+import org.eclipse.sirius.viewpoint.description.tool.util.ToolSwitch;
>+import org.eclipse.sirius.viewpoint.description.util.DescriptionSwitch;
> 
> /**
>  * This is the factory that is used to provide the interfaces needed to support
>@@ -883,4 +902,282 @@ public class ToolItemProviderAdapterFactory extends ToolAdapterFactory implement
>             containerDropDescriptionItemProvider.dispose();
>     }
> 
>+    /**
>+     * A child creation extender for the {@link DescriptionPackage}.  
>+     * 
>+     * @generated
>+     */
>+    public static class DescriptionChildCreationExtender implements IChildCreationExtender {
>+        /**
>+         * The switch for creating child descriptors specific to each extended
>+         * class.  
>+         * 
>+         * @generated
>+         */
>+        protected static class CreationSwitch extends DescriptionSwitch<Object> {
>+            /**
>+             * The child descriptors being populated. 
>+             * 
>+             * 
>+             * @generated
>+             */
>+            protected List<Object> newChildDescriptors;
>+
>+            /**
>+             * The domain in which to create the children.  
>+             * 
>+             * @generated
>+             */
>+            protected EditingDomain editingDomain;
>+
>+            /**
>+             * Creates the a switch for populating child descriptors in the
>+             * given domain.  
>+             * 
>+             * @generated
>+             */
>+            CreationSwitch(List<Object> newChildDescriptors, EditingDomain editingDomain) {
>+                this.newChildDescriptors = newChildDescriptors;
>+                this.editingDomain = editingDomain;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseEnvironment(Environment object) {
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createToolGroup()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createNodeCreationDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createEdgeCreationDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createContainerCreationDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createDeleteElementDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createDoubleClickDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createReconnectEdgeDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createRequestDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createDirectEditLabel()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createBehaviorTool()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createDiagramCreationDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createDiagramNavigationDescription()));
>+
>+                newChildDescriptors.add(createChildParameter(DescriptionPackage.Literals.ENVIRONMENT__DEFAULT_TOOLS, ToolFactory.eINSTANCE.createContainerDropDescription()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            protected CommandParameter createChildParameter(Object feature, Object child) {
>+                return new CommandParameter(null, feature, child);
>+            }
>+
>+        }
>+
>+        /**
>+         *  
>+         * 
>+         * @generated
>+         */
>+        public Collection<Object> getNewChildDescriptors(Object object, EditingDomain editingDomain) {
>+            ArrayList<Object> result = new ArrayList<Object>();
>+            new CreationSwitch(result, editingDomain).doSwitch((EObject) object);
>+            return result;
>+        }
>+
>+        /**
>+         *  
>+         * 
>+         * @generated
>+         */
>+        public ResourceLocator getResourceLocator() {
>+            return DiagramUIPlugin.INSTANCE;
>+        }
>+    }
>+
>+    /**
>+     * A child creation extender for the {@link ToolPackage}.  
>+     * 
>+     * @generated
>+     */
>+    public static class ToolChildCreationExtender implements IChildCreationExtender {
>+        /**
>+         * The switch for creating child descriptors specific to each extended
>+         * class.  
>+         * 
>+         * @generated
>+         */
>+        protected static class CreationSwitch extends ToolSwitch<Object> {
>+            /**
>+             * The child descriptors being populated. 
>+             * 
>+             * 
>+             * @generated
>+             */
>+            protected List<Object> newChildDescriptors;
>+
>+            /**
>+             * The domain in which to create the children.  
>+             * 
>+             * @generated
>+             */
>+            protected EditingDomain editingDomain;
>+
>+            /**
>+             * Creates the a switch for populating child descriptors in the
>+             * given domain.  
>+             * 
>+             * @generated
>+             */
>+            CreationSwitch(List<Object> newChildDescriptors, EditingDomain editingDomain) {
>+                this.newChildDescriptors = newChildDescriptors;
>+                this.editingDomain = editingDomain;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseContainerModelOperation(ContainerModelOperation object) {
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.CONTAINER_MODEL_OPERATION__SUB_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.CONTAINER_MODEL_OPERATION__SUB_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateEdgeView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.CONTAINER_MODEL_OPERATION__SUB_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createNavigation()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseInitialNodeCreationOperation(InitialNodeCreationOperation object) {
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_NODE_CREATION_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_NODE_CREATION_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateEdgeView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_NODE_CREATION_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createNavigation()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseInitialOperation(InitialOperation object) {
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateEdgeView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createNavigation()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseInitEdgeCreationOperation(InitEdgeCreationOperation object) {
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INIT_EDGE_CREATION_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INIT_EDGE_CREATION_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateEdgeView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INIT_EDGE_CREATION_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createNavigation()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseInitialContainerDropOperation(InitialContainerDropOperation object) {
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_CONTAINER_DROP_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_CONTAINER_DROP_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateEdgeView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.INITIAL_CONTAINER_DROP_OPERATION__FIRST_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createNavigation()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            @Override
>+            public Object caseSwitchChild(SwitchChild object) {
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.SWITCH_CHILD__SUB_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.SWITCH_CHILD__SUB_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createCreateEdgeView()));
>+
>+                newChildDescriptors.add(createChildParameter(ToolPackage.Literals.SWITCH_CHILD__SUB_MODEL_OPERATIONS, ToolFactory.eINSTANCE.createNavigation()));
>+
>+                return null;
>+            }
>+
>+            /**
>+             *  
>+             * 
>+             * @generated
>+             */
>+            protected CommandParameter createChildParameter(Object feature, Object child) {
>+                return new CommandParameter(null, feature, child);
>+            }
>+
>+        }
>+
>+        /**
>+         *  
>+         * 
>+         * @generated
>+         */
>+        public Collection<Object> getNewChildDescriptors(Object object, EditingDomain editingDomain) {
>+            ArrayList<Object> result = new ArrayList<Object>();
>+            new CreationSwitch(result, editingDomain).doSwitch((EObject) object);
>+            return result;
>+        }
>+
>+        /**
>+         *  
>+         * 
>+         * @generated
>+         */
>+        public ResourceLocator getResourceLocator() {
>+            return DiagramUIPlugin.INSTANCE;
>+        }
>+    }
>+
> }
>diff --git a/plugins/org.eclipse.sirius.diagram/model/diagram.genmodel b/plugins/org.eclipse.sirius.diagram/model/diagram.genmodel
>index 5daa39a..b23e3fb 100644
>--- a/plugins/org.eclipse.sirius.diagram/model/diagram.genmodel
>+++ b/plugins/org.eclipse.sirius.diagram/model/diagram.genmodel
>@@ -329,7 +329,7 @@
>       <genOperations ecoreOperation="diagram.ecore#//DragAndDropTarget/getDragAndDropDescription"/>
>     </genClasses>
>     <nestedGenPackages prefix="Description" basePackage="org.eclipse.sirius.diagram"
>-        disposableProviderFactory="true" ecorePackage="diagram.ecore#//description">
>+        disposableProviderFactory="true" childCreationExtenders="true" ecorePackage="diagram.ecore#//description">
>       <genEnums ecoreEnum="diagram.ecore#//description/FoldingStyle">
>         <genEnumLiterals ecoreEnumLiteral="diagram.ecore#//description/FoldingStyle/NONE"/>
>         <genEnumLiterals ecoreEnumLiteral="diagram.ecore#//description/FoldingStyle/SOURCE"/>
>@@ -647,7 +647,7 @@
>             propertySortChoices="true" ecoreFeature="ecore:EReference diagram.ecore#//description/DragAndDropTargetDescription/dropDescriptions"/>
>       </genClasses>
>       <nestedGenPackages prefix="Style" basePackage="org.eclipse.sirius.diagram.description"
>-          disposableProviderFactory="true" ecorePackage="diagram.ecore#//description/style">
>+          disposableProviderFactory="true" childCreationExtenders="true" ecorePackage="diagram.ecore#//description/style">
>         <genClasses ecoreClass="diagram.ecore#//description/style/BorderedStyleDescription">
>           <genFeatures createChild="false" propertyCategory="Border" propertyDescription="Expression returning the size of the border."
>               ecoreFeature="ecore:EAttribute diagram.ecore#//description/style/BorderedStyleDescription/borderSizeComputationExpression"/>
>@@ -755,7 +755,7 @@
>         <genClasses ecoreClass="diagram.ecore#//description/style/BracketEdgeStyleDescription"/>
>       </nestedGenPackages>
>       <nestedGenPackages prefix="Tool" basePackage="org.eclipse.sirius.diagram.description"
>-          disposableProviderFactory="true" ecorePackage="diagram.ecore#//description/tool">
>+          disposableProviderFactory="true" childCreationExtenders="true" ecorePackage="diagram.ecore#//description/tool">
>         <genEnums ecoreEnum="diagram.ecore#//description/tool/ReconnectionKind">
>           <genEnumLiterals ecoreEnumLiteral="diagram.ecore#//description/tool/ReconnectionKind/RECONNECT_TARGET"/>
>           <genEnumLiterals ecoreEnumLiteral="diagram.ecore#//description/tool/ReconnectionKind/RECONNECT_SOURCE"/>
>@@ -937,7 +937,7 @@
>         </genClasses>
>       </nestedGenPackages>
>       <nestedGenPackages prefix="Filter" basePackage="org.eclipse.sirius.diagram.description"
>-          disposableProviderFactory="true" ecorePackage="diagram.ecore#//description/filter">
>+          disposableProviderFactory="true" childCreationExtenders="true" ecorePackage="diagram.ecore#//description/filter">
>         <genEnums ecoreEnum="diagram.ecore#//description/filter/FilterKind">
>           <genEnumLiterals ecoreEnumLiteral="diagram.ecore#//description/filter/FilterKind/HIDE"/>
>           <genEnumLiterals ecoreEnumLiteral="diagram.ecore#//description/filter/FilterKind/COLLAPSE"/>
>@@ -975,7 +975,7 @@
>         </genClasses>
>       </nestedGenPackages>
>       <nestedGenPackages prefix="Concern" basePackage="org.eclipse.sirius.diagram.description"
>-          disposableProviderFactory="true" ecorePackage="diagram.ecore#//description/concern">
>+          disposableProviderFactory="true" childCreationExtenders="true" ecorePackage="diagram.ecore#//description/concern">
>         <genClasses ecoreClass="diagram.ecore#//description/concern/ConcernSet">
>           <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference diagram.ecore#//description/concern/ConcernSet/ownedConcernDescriptions"/>
>         </genClasses>
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/audit/provider/AuditItemProviderAdapterFactory.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/audit/provider/AuditItemProviderAdapterFactory.java
>index 5ef6f84..f686a8f 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/audit/provider/AuditItemProviderAdapterFactory.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/audit/provider/AuditItemProviderAdapterFactory.java
>@@ -13,14 +13,19 @@ package org.eclipse.sirius.viewpoint.description.audit.provider;
> 
> import java.util.ArrayList;
> import java.util.Collection;
>+import java.util.List;
> 
> import org.eclipse.emf.common.notify.Adapter;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.notify.Notifier;
>+import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.edit.domain.EditingDomain;
> import org.eclipse.emf.edit.provider.ChangeNotifier;
>+import org.eclipse.emf.edit.provider.ChildCreationExtenderManager;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
> import org.eclipse.emf.edit.provider.IChangeNotifier;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IDisposable;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
>@@ -28,7 +33,9 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.INotifyChangedListener;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
>+import org.eclipse.sirius.viewpoint.description.audit.AuditPackage;
> import org.eclipse.sirius.viewpoint.description.audit.util.AuditAdapterFactory;
>+import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the factory that is used to provide the interfaces needed to support
>@@ -40,7 +47,7 @@ import org.eclipse.sirius.viewpoint.description.audit.util.AuditAdapterFactory;
>  * 
>  * @generated
>  */
>-public class AuditItemProviderAdapterFactory extends AuditAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable {
>+public class AuditItemProviderAdapterFactory extends AuditAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable, IChildCreationExtender {
>     /**
>      * This keeps track of the root adapter factory that delegates to this
>      * adapter factory.  
>@@ -59,6 +66,14 @@ public class AuditItemProviderAdapterFactory extends AuditAdapterFactory impleme
>     protected IChangeNotifier changeNotifier = new ChangeNotifier();
> 
>     /**
>+     * This helps manage the child creation extenders. 
>+     * 
>+     * 
>+     * @generated
>+     */
>+    protected ChildCreationExtenderManager childCreationExtenderManager = new ChildCreationExtenderManager(SiriusEditPlugin.INSTANCE, AuditPackage.eNS_URI);
>+
>+    /**
>      * This keeps track of all the supported types checked by
>      * {@link #isFactoryForType isFactoryForType}.  
>@@ -165,6 +180,33 @@ public class AuditItemProviderAdapterFactory extends AuditAdapterFactory impleme
>     }
> 
>     /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public List<IChildCreationExtender> getChildCreationExtenders() {
>+        return childCreationExtenderManager.getChildCreationExtenders();
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public Collection<?> getNewChildDescriptors(Object object, EditingDomain editingDomain) {
>+        return childCreationExtenderManager.getNewChildDescriptors(object, editingDomain);
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public ResourceLocator getResourceLocator() {
>+        return childCreationExtenderManager;
>+    }
>+
>+    /**
>      * This adds a listener.  
>      * 
>      * @generated
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/audit/provider/InformationSectionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/audit/provider/InformationSectionItemProvider.java
>index cbcaf31..f0d97e3 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/audit/provider/InformationSectionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/audit/provider/InformationSectionItemProvider.java
>@@ -17,6 +17,7 @@ import java.util.List;
> import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -24,7 +25,6 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
> import org.eclipse.emf.edit.provider.ItemProviderAdapter;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -105,7 +105,7 @@ public class InformationSectionItemProvider extends ItemProviderAdapter implemen
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/AbstractMappingImportItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/AbstractMappingImportItemProvider.java
>index 142ffe8..4197fc5 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/AbstractMappingImportItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/AbstractMappingImportItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.AbstractMappingImport;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -146,7 +146,7 @@ public class AbstractMappingImportItemProvider extends ItemProviderAdapter imple
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/AnnotationEntryItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/AnnotationEntryItemProvider.java
>index 30ba8a7..9f3a486 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/AnnotationEntryItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/AnnotationEntryItemProvider.java
>@@ -20,6 +20,7 @@ import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.ecore.EcoreFactory;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -31,7 +32,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.AnnotationEntry;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -181,7 +181,7 @@ public class AnnotationEntryItemProvider extends ItemProviderAdapter implements
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ColorDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ColorDescriptionItemProvider.java
>index 97041b2..d1e078a 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ColorDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ColorDescriptionItemProvider.java
>@@ -17,6 +17,7 @@ import java.util.List;
> import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -24,7 +25,6 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
> import org.eclipse.emf.edit.provider.ItemProviderAdapter;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -105,7 +105,7 @@ public class ColorDescriptionItemProvider extends ItemProviderAdapter implements
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ColorStepItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ColorStepItemProvider.java
>index ae51ed4..5860d36 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ColorStepItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ColorStepItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.ColorStep;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -152,7 +152,7 @@ public class ColorStepItemProvider extends ItemProviderAdapter implements IEditi
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ConditionalStyleDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ConditionalStyleDescriptionItemProvider.java
>index e5d31c8..a5ad6ed 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ConditionalStyleDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/ConditionalStyleDescriptionItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.ConditionalStyleDescription;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -131,7 +131,7 @@ public class ConditionalStyleDescriptionItemProvider extends ItemProviderAdapter
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/CustomizationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/CustomizationItemProvider.java
>index 754b7f2..343c9e6 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/CustomizationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/CustomizationItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.Customization;
> import org.eclipse.sirius.viewpoint.description.DescriptionFactory;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -164,7 +164,7 @@ public class CustomizationItemProvider extends ItemProviderAdapter implements IE
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DAnnotationEntryItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DAnnotationEntryItemProvider.java
>index 0dad678..cf26351 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DAnnotationEntryItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DAnnotationEntryItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DAnnotationEntry;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -155,7 +155,7 @@ public class DAnnotationEntryItemProvider extends ItemProviderAdapter implements
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DAnnotationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DAnnotationItemProvider.java
>index e650915..855c4ed 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DAnnotationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DAnnotationItemProvider.java
>@@ -21,6 +21,7 @@ import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.ecore.EcoreFactory;
> import org.eclipse.emf.ecore.EcorePackage;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -32,7 +33,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DAnnotation;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -182,7 +182,7 @@ public class DAnnotationItemProvider extends ItemProviderAdapter implements IEdi
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DModelElementItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DModelElementItemProvider.java
>index 0131f2f..32a79d6 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DModelElementItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DModelElementItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DModelElement;
> import org.eclipse.sirius.viewpoint.description.DescriptionFactory;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -151,7 +151,7 @@ public class DModelElementItemProvider extends ItemProviderAdapter implements IE
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DecorationDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DecorationDescriptionItemProvider.java
>index c2dd9e7..3a41291 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DecorationDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DecorationDescriptionItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DecorationDescription;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -173,7 +173,7 @@ public class DecorationDescriptionItemProvider extends ItemProviderAdapter imple
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DecorationDescriptionsSetItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DecorationDescriptionsSetItemProvider.java
>index c08fd47..1ce4613 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DecorationDescriptionsSetItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DecorationDescriptionsSetItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DecorationDescriptionsSet;
> import org.eclipse.sirius.viewpoint.description.DescriptionFactory;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -162,7 +162,7 @@ public class DecorationDescriptionsSetItemProvider extends ItemProviderAdapter i
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DescriptionItemProviderAdapterFactory.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DescriptionItemProviderAdapterFactory.java
>index e4c809e..b1c8931 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DescriptionItemProviderAdapterFactory.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DescriptionItemProviderAdapterFactory.java
>@@ -13,14 +13,19 @@ package org.eclipse.sirius.viewpoint.description.provider;
> 
> import java.util.ArrayList;
> import java.util.Collection;
>+import java.util.List;
> 
> import org.eclipse.emf.common.notify.Adapter;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.notify.Notifier;
>+import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.edit.domain.EditingDomain;
> import org.eclipse.emf.edit.provider.ChangeNotifier;
>+import org.eclipse.emf.edit.provider.ChildCreationExtenderManager;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
> import org.eclipse.emf.edit.provider.IChangeNotifier;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IDisposable;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
>@@ -28,7 +33,9 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.INotifyChangedListener;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
>+import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.util.DescriptionAdapterFactory;
>+import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the factory that is used to provide the interfaces needed to support
>@@ -40,7 +47,7 @@ import org.eclipse.sirius.viewpoint.description.util.DescriptionAdapterFactory;
>  * 
>  * @generated
>  */
>-public class DescriptionItemProviderAdapterFactory extends DescriptionAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable {
>+public class DescriptionItemProviderAdapterFactory extends DescriptionAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable, IChildCreationExtender {
>     /**
>      * This keeps track of the root adapter factory that delegates to this
>      * adapter factory.  
>@@ -59,6 +66,14 @@ public class DescriptionItemProviderAdapterFactory extends DescriptionAdapterFac
>     protected IChangeNotifier changeNotifier = new ChangeNotifier();
> 
>     /**
>+     * This helps manage the child creation extenders. 
>+     * 
>+     * 
>+     * @generated
>+     */
>+    protected ChildCreationExtenderManager childCreationExtenderManager = new ChildCreationExtenderManager(SiriusEditPlugin.INSTANCE, DescriptionPackage.eNS_URI);
>+
>+    /**
>      * This keeps track of all the supported types checked by
>      * {@link #isFactoryForType isFactoryForType}.  
>@@ -740,6 +755,33 @@ public class DescriptionItemProviderAdapterFactory extends DescriptionAdapterFac
>     }
> 
>     /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public List<IChildCreationExtender> getChildCreationExtenders() {
>+        return childCreationExtenderManager.getChildCreationExtenders();
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public Collection<?> getNewChildDescriptors(Object object, EditingDomain editingDomain) {
>+        return childCreationExtenderManager.getNewChildDescriptors(object, editingDomain);
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public ResourceLocator getResourceLocator() {
>+        return childCreationExtenderManager;
>+    }
>+
>+    /**
>      * This adds a listener.  
>      * 
>      * @generated
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DocumentedElementItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DocumentedElementItemProvider.java
>index 83c289f..8bbd7dd 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DocumentedElementItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/DocumentedElementItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.DocumentedElement;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -130,7 +130,7 @@ public class DocumentedElementItemProvider extends ItemProviderAdapter implement
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EStructuralFeatureCustomizationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EStructuralFeatureCustomizationItemProvider.java
>index 4bd105a..256fe75 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EStructuralFeatureCustomizationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EStructuralFeatureCustomizationItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.EStructuralFeatureCustomization;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -143,7 +143,7 @@ public class EStructuralFeatureCustomizationItemProvider extends ItemProviderAda
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EndUserDocumentedElementItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EndUserDocumentedElementItemProvider.java
>index 987c1aa..9b9a31c 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EndUserDocumentedElementItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EndUserDocumentedElementItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.EndUserDocumentedElement;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -131,7 +131,7 @@ public class EndUserDocumentedElementItemProvider extends ItemProviderAdapter im
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EnvironmentItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EnvironmentItemProvider.java
>index e99bfc8..7d71b7c 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EnvironmentItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/EnvironmentItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -31,7 +32,6 @@ import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.Environment;
> import org.eclipse.sirius.viewpoint.description.style.StyleFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -186,7 +186,7 @@ public class EnvironmentItemProvider extends ItemProviderAdapter implements IEdi
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/IdentifiedElementItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/IdentifiedElementItemProvider.java
>index 1f885d2..2ed09ba 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/IdentifiedElementItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/IdentifiedElementItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.IdentifiedElement;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -155,7 +155,7 @@ public class IdentifiedElementItemProvider extends ItemProviderAdapter implement
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/JavaExtensionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/JavaExtensionItemProvider.java
>index a510cba..848de28 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/JavaExtensionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/JavaExtensionItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.JavaExtension;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -141,7 +141,7 @@ public class JavaExtensionItemProvider extends ItemProviderAdapter implements IE
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/MetamodelExtensionSettingItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/MetamodelExtensionSettingItemProvider.java
>index e71e9d5..92715e6 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/MetamodelExtensionSettingItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/MetamodelExtensionSettingItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -26,7 +27,6 @@ import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
> import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -132,7 +132,7 @@ public class MetamodelExtensionSettingItemProvider extends ItemProviderAdapter i
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/PasteTargetDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/PasteTargetDescriptionItemProvider.java
>index b3a911b..4f63773 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/PasteTargetDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/PasteTargetDescriptionItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -26,7 +27,6 @@ import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
> import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -120,7 +120,7 @@ public class PasteTargetDescriptionItemProvider extends ItemProviderAdapter impl
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/RepresentationTemplateItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/RepresentationTemplateItemProvider.java
>index 6fc1207..6051739 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/RepresentationTemplateItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/RepresentationTemplateItemProvider.java
>@@ -19,6 +19,7 @@ import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -30,7 +31,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.RepresentationTemplate;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -167,7 +167,7 @@ public class RepresentationTemplateItemProvider extends ItemProviderAdapter impl
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/SytemColorsPaletteItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/SytemColorsPaletteItemProvider.java
>index 446a485..c7c7036 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/SytemColorsPaletteItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/SytemColorsPaletteItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionFactory;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.SytemColorsPalette;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -162,7 +162,7 @@ public class SytemColorsPaletteItemProvider extends ItemProviderAdapter implemen
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/UserColorItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/UserColorItemProvider.java
>index ff8e016..333dd59 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/UserColorItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/UserColorItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.UserColor;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -139,7 +139,7 @@ public class UserColorItemProvider extends ItemProviderAdapter implements IEditi
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/UserColorsPaletteItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/UserColorsPaletteItemProvider.java
>index 9fcacae..5878699 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/UserColorsPaletteItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/UserColorsPaletteItemProvider.java
>@@ -19,6 +19,7 @@ import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -32,7 +33,6 @@ import org.eclipse.sirius.viewpoint.description.DescriptionFactory;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.InterpolatedColor;
> import org.eclipse.sirius.viewpoint.description.UserColorsPalette;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -189,7 +189,7 @@ public class UserColorsPaletteItemProvider extends ItemProviderAdapter implement
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/VSMElementCustomizationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/VSMElementCustomizationItemProvider.java
>index f0faeb4..203a8db 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/VSMElementCustomizationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/VSMElementCustomizationItemProvider.java
>@@ -19,6 +19,7 @@ import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -31,7 +32,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.DescriptionFactory;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
> import org.eclipse.sirius.viewpoint.description.VSMElementCustomization;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -183,7 +183,7 @@ public class VSMElementCustomizationItemProvider extends ItemProviderAdapter imp
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/VSMElementCustomizationReuseItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/VSMElementCustomizationReuseItemProvider.java
>index ef8030a..4f4ce86 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/VSMElementCustomizationReuseItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/provider/VSMElementCustomizationReuseItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -26,7 +27,6 @@ import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
> import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.sirius.viewpoint.description.DescriptionPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -144,7 +144,7 @@ public class VSMElementCustomizationReuseItemProvider extends ItemProviderAdapte
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/BasicLabelStyleDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/BasicLabelStyleDescriptionItemProvider.java
>index 42d107e..b60a969 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/BasicLabelStyleDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/BasicLabelStyleDescriptionItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.style.BasicLabelStyleDescription;
> import org.eclipse.sirius.viewpoint.description.style.StylePackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -215,7 +215,7 @@ public class BasicLabelStyleDescriptionItemProvider extends ItemProviderAdapter
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/LabelBorderStyleDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/LabelBorderStyleDescriptionItemProvider.java
>index 9d0d7e8..d1de69f 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/LabelBorderStyleDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/LabelBorderStyleDescriptionItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.style.LabelBorderStyleDescription;
> import org.eclipse.sirius.viewpoint.description.style.StylePackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -195,7 +195,7 @@ public class LabelBorderStyleDescriptionItemProvider extends ItemProviderAdapter
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/LabelBorderStylesItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/LabelBorderStylesItemProvider.java
>index ab987f3..e970709 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/LabelBorderStylesItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/LabelBorderStylesItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.style.LabelBorderStyles;
> import org.eclipse.sirius.viewpoint.description.style.StyleFactory;
> import org.eclipse.sirius.viewpoint.description.style.StylePackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -162,7 +162,7 @@ public class LabelBorderStylesItemProvider extends ItemProviderAdapter implement
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/StyleItemProviderAdapterFactory.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/StyleItemProviderAdapterFactory.java
>index a662aca..b90dbc3 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/StyleItemProviderAdapterFactory.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/StyleItemProviderAdapterFactory.java
>@@ -13,14 +13,19 @@ package org.eclipse.sirius.viewpoint.description.style.provider;
> 
> import java.util.ArrayList;
> import java.util.Collection;
>+import java.util.List;
> 
> import org.eclipse.emf.common.notify.Adapter;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.notify.Notifier;
>+import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.edit.domain.EditingDomain;
> import org.eclipse.emf.edit.provider.ChangeNotifier;
>+import org.eclipse.emf.edit.provider.ChildCreationExtenderManager;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
> import org.eclipse.emf.edit.provider.IChangeNotifier;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IDisposable;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
>@@ -28,7 +33,9 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.INotifyChangedListener;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
>+import org.eclipse.sirius.viewpoint.description.style.StylePackage;
> import org.eclipse.sirius.viewpoint.description.style.util.StyleAdapterFactory;
>+import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the factory that is used to provide the interfaces needed to support
>@@ -40,7 +47,7 @@ import org.eclipse.sirius.viewpoint.description.style.util.StyleAdapterFactory;
>  * 
>  * @generated
>  */
>-public class StyleItemProviderAdapterFactory extends StyleAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable {
>+public class StyleItemProviderAdapterFactory extends StyleAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable, IChildCreationExtender {
>     /**
>      * This keeps track of the root adapter factory that delegates to this
>      * adapter factory.  
>@@ -59,6 +66,14 @@ public class StyleItemProviderAdapterFactory extends StyleAdapterFactory impleme
>     protected IChangeNotifier changeNotifier = new ChangeNotifier();
> 
>     /**
>+     * This helps manage the child creation extenders. 
>+     * 
>+     * 
>+     * @generated
>+     */
>+    protected ChildCreationExtenderManager childCreationExtenderManager = new ChildCreationExtenderManager(SiriusEditPlugin.INSTANCE, StylePackage.eNS_URI);
>+
>+    /**
>      * This keeps track of all the supported types checked by
>      * {@link #isFactoryForType isFactoryForType}.  
>@@ -266,6 +281,33 @@ public class StyleItemProviderAdapterFactory extends StyleAdapterFactory impleme
>     }
> 
>     /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public List<IChildCreationExtender> getChildCreationExtenders() {
>+        return childCreationExtenderManager.getChildCreationExtenders();
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public Collection<?> getNewChildDescriptors(Object object, EditingDomain editingDomain) {
>+        return childCreationExtenderManager.getNewChildDescriptors(object, editingDomain);
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public ResourceLocator getResourceLocator() {
>+        return childCreationExtenderManager;
>+    }
>+
>+    /**
>      * This adds a listener.  
>      * 
>      * @generated
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/TooltipStyleDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/TooltipStyleDescriptionItemProvider.java
>index cb6c0e3..a38d644 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/TooltipStyleDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/style/provider/TooltipStyleDescriptionItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.style.StylePackage;
> import org.eclipse.sirius.viewpoint.description.style.TooltipStyleDescription;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -142,7 +142,7 @@ public class TooltipStyleDescriptionItemProvider extends ItemProviderAdapter imp
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/AbstractToolDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/AbstractToolDescriptionItemProvider.java
>index 56cba2d..fe65620 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/AbstractToolDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/AbstractToolDescriptionItemProvider.java
>@@ -16,7 +16,6 @@ import java.util.List;
> 
> import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
>-import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
>@@ -32,7 +31,6 @@ import org.eclipse.sirius.viewpoint.description.provider.DocumentedElementItemPr
> import org.eclipse.sirius.viewpoint.description.tool.AbstractToolDescription;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -207,15 +205,4 @@ public class AbstractToolDescriptionItemProvider extends DocumentedElementItemPr
>         newChildDescriptors.add(createChildParameter(ToolPackage.Literals.ABSTRACT_TOOL_DESCRIPTION__FILTERS, ToolFactory.eINSTANCE.createToolFilterDescription()));
>     }
> 
>-    /**
>-     * Return the resource locator for this item provider's resources.  
>-     * 
>-     * @generated
>-     */
>-    @Override
>-    public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>-    }
>-
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/AbstractVariableItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/AbstractVariableItemProvider.java
>index d12c8d1..76003ff 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/AbstractVariableItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/AbstractVariableItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.AbstractVariable;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -130,7 +130,7 @@ public class AbstractVariableItemProvider extends ItemProviderAdapter implements
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/EditMaskVariablesItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/EditMaskVariablesItemProvider.java
>index 4b2e660..616b810 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/EditMaskVariablesItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/EditMaskVariablesItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.EditMaskVariables;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -141,7 +141,7 @@ public class EditMaskVariablesItemProvider extends ItemProviderAdapter implement
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ExternalJavaActionParameterItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ExternalJavaActionParameterItemProvider.java
>index 79883c0..03f7ad7 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ExternalJavaActionParameterItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ExternalJavaActionParameterItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.ExternalJavaActionParameter;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -155,7 +155,7 @@ public class ExternalJavaActionParameterItemProvider extends ItemProviderAdapter
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/FeatureChangeListenerItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/FeatureChangeListenerItemProvider.java
>index 5466720..9844e61 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/FeatureChangeListenerItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/FeatureChangeListenerItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.FeatureChangeListener;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -155,7 +155,7 @@ public class FeatureChangeListenerItemProvider extends ItemProviderAdapter imple
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitEdgeCreationOperationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitEdgeCreationOperationItemProvider.java
>index 0bd8444..a2d15ed 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitEdgeCreationOperationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitEdgeCreationOperationItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.InitEdgeCreationOperation;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -186,7 +186,7 @@ public class InitEdgeCreationOperationItemProvider extends ItemProviderAdapter i
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialContainerDropOperationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialContainerDropOperationItemProvider.java
>index 7ada3ce..8a5b3a9 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialContainerDropOperationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialContainerDropOperationItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.InitialContainerDropOperation;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -186,7 +186,7 @@ public class InitialContainerDropOperationItemProvider extends ItemProviderAdapt
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialNodeCreationOperationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialNodeCreationOperationItemProvider.java
>index a296f83..09955a6 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialNodeCreationOperationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialNodeCreationOperationItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.InitialNodeCreationOperation;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -186,7 +186,7 @@ public class InitialNodeCreationOperationItemProvider extends ItemProviderAdapte
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialOperationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialOperationItemProvider.java
>index e5c1a73..10ab290 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialOperationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/InitialOperationItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.InitialOperation;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -186,7 +186,7 @@ public class InitialOperationItemProvider extends ItemProviderAdapter implements
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/MenuItemDescriptionReferenceItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/MenuItemDescriptionReferenceItemProvider.java
>index ed5a32d..eee5b46 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/MenuItemDescriptionReferenceItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/MenuItemDescriptionReferenceItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -26,7 +27,6 @@ import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
> import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -132,7 +132,7 @@ public class MenuItemDescriptionReferenceItemProvider extends ItemProviderAdapte
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ModelOperationItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ModelOperationItemProvider.java
>index d503973..246092b 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ModelOperationItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ModelOperationItemProvider.java
>@@ -17,6 +17,7 @@ import java.util.List;
> import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -24,7 +25,6 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
> import org.eclipse.emf.edit.provider.ItemProviderAdapter;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -105,7 +105,7 @@ public class ModelOperationItemProvider extends ItemProviderAdapter implements I
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/SwitchChildItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/SwitchChildItemProvider.java
>index b811cbb..e7e4c76 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/SwitchChildItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/SwitchChildItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -32,7 +33,6 @@ import org.eclipse.sirius.viewpoint.description.tool.Switch;
> import org.eclipse.sirius.viewpoint.description.tool.SwitchChild;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -221,7 +221,7 @@ public class SwitchChildItemProvider extends ItemProviderAdapter implements IEdi
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ToolFilterDescriptionItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ToolFilterDescriptionItemProvider.java
>index 826cc36..a631504 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ToolFilterDescriptionItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ToolFilterDescriptionItemProvider.java
>@@ -19,6 +19,7 @@ import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -31,7 +32,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFilterDescription;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -195,7 +195,7 @@ public class ToolFilterDescriptionItemProvider extends ItemProviderAdapter imple
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ToolItemProviderAdapterFactory.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ToolItemProviderAdapterFactory.java
>index cabfcc6..d33686d 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ToolItemProviderAdapterFactory.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/ToolItemProviderAdapterFactory.java
>@@ -13,14 +13,19 @@ package org.eclipse.sirius.viewpoint.description.tool.provider;
> 
> import java.util.ArrayList;
> import java.util.Collection;
>+import java.util.List;
> 
> import org.eclipse.emf.common.notify.Adapter;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.notify.Notifier;
>+import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.edit.domain.EditingDomain;
> import org.eclipse.emf.edit.provider.ChangeNotifier;
>+import org.eclipse.emf.edit.provider.ChildCreationExtenderManager;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
> import org.eclipse.emf.edit.provider.IChangeNotifier;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IDisposable;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
>@@ -28,7 +33,9 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.INotifyChangedListener;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
>+import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
> import org.eclipse.sirius.viewpoint.description.tool.util.ToolAdapterFactory;
>+import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the factory that is used to provide the interfaces needed to support
>@@ -40,7 +47,7 @@ import org.eclipse.sirius.viewpoint.description.tool.util.ToolAdapterFactory;
>  * 
>  * @generated
>  */
>-public class ToolItemProviderAdapterFactory extends ToolAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable {
>+public class ToolItemProviderAdapterFactory extends ToolAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable, IChildCreationExtender {
>     /**
>      * This keeps track of the root adapter factory that delegates to this
>      * adapter factory.  
>@@ -59,6 +66,14 @@ public class ToolItemProviderAdapterFactory extends ToolAdapterFactory implement
>     protected IChangeNotifier changeNotifier = new ChangeNotifier();
> 
>     /**
>+     * This helps manage the child creation extenders. 
>+     * 
>+     * 
>+     * @generated
>+     */
>+    protected ChildCreationExtenderManager childCreationExtenderManager = new ChildCreationExtenderManager(SiriusEditPlugin.INSTANCE, ToolPackage.eNS_URI);
>+
>+    /**
>      * This keeps track of all the supported types checked by
>      * {@link #isFactoryForType isFactoryForType}.  
>@@ -1165,6 +1180,33 @@ public class ToolItemProviderAdapterFactory extends ToolAdapterFactory implement
>     }
> 
>     /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public List<IChildCreationExtender> getChildCreationExtenders() {
>+        return childCreationExtenderManager.getChildCreationExtenders();
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public Collection<?> getNewChildDescriptors(Object object, EditingDomain editingDomain) {
>+        return childCreationExtenderManager.getNewChildDescriptors(object, editingDomain);
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public ResourceLocator getResourceLocator() {
>+        return childCreationExtenderManager;
>+    }
>+
>+    /**
>      * This adds a listener.  
>      * 
>      * @generated
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/VariableContainerItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/VariableContainerItemProvider.java
>index a08d868..5933330 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/VariableContainerItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/tool/provider/VariableContainerItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.tool.ToolPackage;
> import org.eclipse.sirius.viewpoint.description.tool.VariableContainer;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -153,7 +153,7 @@ public class VariableContainerItemProvider extends ItemProviderAdapter implement
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/RuleAuditItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/RuleAuditItemProvider.java
>index c39b8a1..a7b434a 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/RuleAuditItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/RuleAuditItemProvider.java
>@@ -18,6 +18,7 @@ import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -29,7 +30,6 @@ import org.eclipse.emf.edit.provider.ItemProviderAdapter;
> import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.validation.RuleAudit;
> import org.eclipse.sirius.viewpoint.description.validation.ValidationPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -139,7 +139,7 @@ public class RuleAuditItemProvider extends ItemProviderAdapter implements IEditi
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationFixItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationFixItemProvider.java
>index fa47682..30f1b2a 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationFixItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationFixItemProvider.java
>@@ -19,6 +19,7 @@ import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -31,7 +32,6 @@ import org.eclipse.emf.edit.provider.ViewerNotification;
> import org.eclipse.sirius.viewpoint.description.tool.ToolFactory;
> import org.eclipse.sirius.viewpoint.description.validation.ValidationFix;
> import org.eclipse.sirius.viewpoint.description.validation.ValidationPackage;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -181,7 +181,7 @@ public class ValidationFixItemProvider extends ItemProviderAdapter implements IE
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationItemProviderAdapterFactory.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationItemProviderAdapterFactory.java
>index 5897114..11d0f4d 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationItemProviderAdapterFactory.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationItemProviderAdapterFactory.java
>@@ -13,14 +13,19 @@ package org.eclipse.sirius.viewpoint.description.validation.provider;
> 
> import java.util.ArrayList;
> import java.util.Collection;
>+import java.util.List;
> 
> import org.eclipse.emf.common.notify.Adapter;
> import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.notify.Notifier;
>+import org.eclipse.emf.common.util.ResourceLocator;
>+import org.eclipse.emf.edit.domain.EditingDomain;
> import org.eclipse.emf.edit.provider.ChangeNotifier;
>+import org.eclipse.emf.edit.provider.ChildCreationExtenderManager;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
> import org.eclipse.emf.edit.provider.IChangeNotifier;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IDisposable;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
>@@ -28,7 +33,9 @@ import org.eclipse.emf.edit.provider.IItemPropertySource;
> import org.eclipse.emf.edit.provider.INotifyChangedListener;
> import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
> import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
>+import org.eclipse.sirius.viewpoint.description.validation.ValidationPackage;
> import org.eclipse.sirius.viewpoint.description.validation.util.ValidationAdapterFactory;
>+import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the factory that is used to provide the interfaces needed to support
>@@ -40,7 +47,7 @@ import org.eclipse.sirius.viewpoint.description.validation.util.ValidationAdapte
>  * 
>  * @generated
>  */
>-public class ValidationItemProviderAdapterFactory extends ValidationAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable {
>+public class ValidationItemProviderAdapterFactory extends ValidationAdapterFactory implements ComposeableAdapterFactory, IChangeNotifier, IDisposable, IChildCreationExtender {
>     /**
>      * This keeps track of the root adapter factory that delegates to this
>      * adapter factory.  
>@@ -59,6 +66,14 @@ public class ValidationItemProviderAdapterFactory extends ValidationAdapterFacto
>     protected IChangeNotifier changeNotifier = new ChangeNotifier();
> 
>     /**
>+     * This helps manage the child creation extenders. 
>+     * 
>+     * 
>+     * @generated
>+     */
>+    protected ChildCreationExtenderManager childCreationExtenderManager = new ChildCreationExtenderManager(SiriusEditPlugin.INSTANCE, ValidationPackage.eNS_URI);
>+
>+    /**
>      * This keeps track of all the supported types checked by
>      * {@link #isFactoryForType isFactoryForType}.  
>@@ -265,6 +280,33 @@ public class ValidationItemProviderAdapterFactory extends ValidationAdapterFacto
>     }
> 
>     /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public List<IChildCreationExtender> getChildCreationExtenders() {
>+        return childCreationExtenderManager.getChildCreationExtenders();
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public Collection<?> getNewChildDescriptors(Object object, EditingDomain editingDomain) {
>+        return childCreationExtenderManager.getNewChildDescriptors(object, editingDomain);
>+    }
>+
>+    /**
>+     *  
>+     * 
>+     * @generated
>+     */
>+    public ResourceLocator getResourceLocator() {
>+        return childCreationExtenderManager;
>+    }
>+
>+    /**
>      * This adds a listener.  
>      * 
>      * @generated
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationRuleItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationRuleItemProvider.java
>index a651acc..ba6f93c 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationRuleItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationRuleItemProvider.java
>@@ -19,6 +19,7 @@ import org.eclipse.emf.common.notify.Notification;
> import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
>+import org.eclipse.emf.edit.provider.IChildCreationExtender;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
> import org.eclipse.emf.edit.provider.IItemLabelProvider;
> import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
>@@ -32,7 +33,6 @@ import org.eclipse.sirius.viewpoint.description.validation.ERROR_LEVEL;
> import org.eclipse.sirius.viewpoint.description.validation.ValidationFactory;
> import org.eclipse.sirius.viewpoint.description.validation.ValidationPackage;
> import org.eclipse.sirius.viewpoint.description.validation.ValidationRule;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -190,7 +190,7 @@ public class ValidationRuleItemProvider extends ItemProviderAdapter implements I
>      */
>     @Override
>     public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>+        return ((IChildCreationExtender) adapterFactory).getResourceLocator();
>     }
> 
> }
>diff --git a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationSetItemProvider.java b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationSetItemProvider.java
>index 89d2ee7..4a7d179 100644
>--- a/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationSetItemProvider.java
>+++ b/plugins/org.eclipse.sirius.ui/src-gen/org/eclipse/sirius/viewpoint/description/validation/provider/ValidationSetItemProvider.java
>@@ -16,7 +16,6 @@ import java.util.List;
> 
> import org.eclipse.emf.common.notify.AdapterFactory;
> import org.eclipse.emf.common.notify.Notification;
>-import org.eclipse.emf.common.util.ResourceLocator;
> import org.eclipse.emf.ecore.EStructuralFeature;
> import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
> import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
>@@ -31,7 +30,6 @@ import org.eclipse.sirius.viewpoint.description.provider.DocumentedElementItemPr
> import org.eclipse.sirius.viewpoint.description.validation.ValidationFactory;
> import org.eclipse.sirius.viewpoint.description.validation.ValidationPackage;
> import org.eclipse.sirius.viewpoint.description.validation.ValidationSet;
>-import org.eclipse.sirius.viewpoint.provider.SiriusEditPlugin;
> 
> /**
>  * This is the item provider adapter for a
>@@ -201,15 +199,4 @@ public class ValidationSetItemProvider extends DocumentedElementItemProvider imp
>         newChildDescriptors.add(createChildParameter(ValidationPackage.Literals.VALIDATION_SET__OWNED_RULES, ValidationFactory.eINSTANCE.createViewValidationRule()));
>     }
> 
>-    /**
>-     * Return the resource locator for this item provider's resources.  
>-     * 
>-     * @generated
>-     */
>-    @Override
>-    public ResourceLocator getResourceLocator() {
>-        return SiriusEditPlugin.INSTANCE;
>-    }
>-
> }
>diff --git a/plugins/org.eclipse.sirius/model/viewpoint.genmodel b/plugins/org.eclipse.sirius/model/viewpoint.genmodel
>index 39e6dfc..ef68a78 100644
>--- a/plugins/org.eclipse.sirius/model/viewpoint.genmodel
>+++ b/plugins/org.eclipse.sirius/model/viewpoint.genmodel
>@@ -148,7 +148,8 @@
>       <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EAttribute viewpoint.ecore#//Customizable/customFeatures"/>
>     </genClasses>
>     <nestedGenPackages prefix="Description" basePackage="org.eclipse.sirius.viewpoint"
>-        resource="XMI" disposableProviderFactory="true" ecorePackage="viewpoint.ecore#//description">
>+        resource="XMI" disposableProviderFactory="true" extensibleProviderFactory="true"
>+        ecorePackage="viewpoint.ecore#//description">
>       <genEnums ecoreEnum="viewpoint.ecore#//description/NavigationTargetType">
>         <genEnumLiterals ecoreEnumLiteral="viewpoint.ecore#//description/NavigationTargetType/model"/>
>         <genEnumLiterals ecoreEnumLiteral="viewpoint.ecore#//description/NavigationTargetType/file"/>
>@@ -417,7 +418,7 @@
>         <genFeatures createChild="false" ecoreFeature="ecore:EAttribute viewpoint.ecore#//description/DAnnotationEntry/details"/>
>       </genClasses>
>       <nestedGenPackages prefix="Style" basePackage="org.eclipse.sirius.viewpoint.description"
>-          disposableProviderFactory="true" ecorePackage="viewpoint.ecore#//description/style">
>+          disposableProviderFactory="true" extensibleProviderFactory="true" ecorePackage="viewpoint.ecore#//description/style">
>         <genClasses image="false" ecoreClass="viewpoint.ecore#//description/style/StyleDescription"/>
>         <genClasses ecoreClass="viewpoint.ecore#//description/style/BasicLabelStyleDescription">
>           <genFeatures createChild="false" propertyCategory="Label" ecoreFeature="ecore:EAttribute viewpoint.ecore#//description/style/BasicLabelStyleDescription/labelSize"/>
>@@ -448,7 +449,7 @@
>         </genClasses>
>       </nestedGenPackages>
>       <nestedGenPackages prefix="Tool" basePackage="org.eclipse.sirius.viewpoint.description"
>-          disposableProviderFactory="true" ecorePackage="viewpoint.ecore#//description/tool">
>+          disposableProviderFactory="true" extensibleProviderFactory="true" ecorePackage="viewpoint.ecore#//description/tool">
>         <genEnums ecoreEnum="viewpoint.ecore#//description/tool/DragSource">
>           <genEnumLiterals ecoreEnumLiteral="viewpoint.ecore#//description/tool/DragSource/DIAGRAM"/>
>           <genEnumLiterals ecoreEnumLiteral="viewpoint.ecore#//description/tool/DragSource/PROJECT_EXPLORER"/>
>@@ -678,7 +679,7 @@
>         </genClasses>
>       </nestedGenPackages>
>       <nestedGenPackages prefix="Validation" basePackage="org.eclipse.sirius.viewpoint.description"
>-          disposableProviderFactory="true" ecorePackage="viewpoint.ecore#//description/validation">
>+          disposableProviderFactory="true" extensibleProviderFactory="true" ecorePackage="viewpoint.ecore#//description/validation">
>         <genEnums ecoreEnum="viewpoint.ecore#//description/validation/ERROR_LEVEL">
>           <genEnumLiterals ecoreEnumLiteral="viewpoint.ecore#//description/validation/ERROR_LEVEL/INFO"/>
>           <genEnumLiterals ecoreEnumLiteral="viewpoint.ecore#//description/validation/ERROR_LEVEL/WARNING"/>
>@@ -721,7 +722,7 @@
>         </genClasses>
>       </nestedGenPackages>
>       <nestedGenPackages prefix="Audit" basePackage="org.eclipse.sirius.viewpoint.description"
>-          disposableProviderFactory="true" ecorePackage="viewpoint.ecore#//description/audit">
>+          disposableProviderFactory="true" extensibleProviderFactory="true" ecorePackage="viewpoint.ecore#//description/audit">
>         <genClasses image="false" ecoreClass="viewpoint.ecore#//description/audit/InformationSection">
>           <genOperations ecoreOperation="viewpoint.ecore#//description/audit/InformationSection/getContent">
>             <genParameters ecoreParameter="viewpoint.ecore#//description/audit/InformationSection/getContent/eObj"/>

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