[1545] Add interconnection compartment on PartDefintion

CHANGELOG.adoc

@@ -78,6 +78,7 @@ This issue was not visible in SysON but could appear in downstream applications
 `SysONUpdateLibraryExecutor` was introduced to fix this issue.
 Now it has been fixed in Sirius Web 2025.8.4, `SysONUpdateLibraryExecutor` has been deleted and `UpdateLibraryExecutor` is used again.
 - https://github.com/eclipse-syson/syson/issues/1522[#1522] [diagrams] To avoid edge blinking when refreshing the diagram, we need to set the properties `measured.height` and `measured.width` with the value of the node layout data when converting a custom node accordingly to the xyflow https://reactflow.dev/learn/advanced-use/ssr-ssg-configuration#node-dimensions[documentation].
+- https://github.com/eclipse-syson/syson/issues/1545[#1545] [diagrams] Add _interconnection_ compartment to `PartDefinition` nodes in the standard diagrams.
 
 === Improvements
 

backend/views/syson-diagram-common-view/src/main/java/org/eclipse/syson/diagram/common/view/nodes/InterconnectionCompartmentNodeDescriptionProvider.java

@@ -16,7 +16,7 @@
 import java.util.List;
 
 import org.eclipse.emf.ecore.EClass;
-import org.eclipse.sirius.components.collaborative.diagrams.api.IDiagramContext;
+import org.eclipse.sirius.components.collaborative.diagrams.DiagramContext;
 import org.eclipse.sirius.components.core.api.IEditingContext;
 import org.eclipse.sirius.components.view.builder.IViewDiagramElementFinder;
 import org.eclipse.sirius.components.view.builder.providers.IColorProvider;
@@ -68,7 +68,7 @@ public NodeDescription create() {
                 .preconditionExpression(
                         AQLUtils.getSelfServiceCallExpression("isView",
                                 List.of("'StandardViewDefinitions::InterconnectionView'", org.eclipse.sirius.components.diagrams.description.NodeDescription.ANCESTORS, IEditingContext.EDITING_CONTEXT,
-                                        IDiagramContext.DIAGRAM_CONTEXT)))
+                                        DiagramContext.DIAGRAM_CONTEXT)))
                 .semanticCandidatesExpression(AQLConstants.AQL_SELF)
                 .style(this.createCompartmentNodeStyle())
                 .userResizable(UserResizableDirection.NONE)
@@ -126,7 +126,7 @@ protected InsideLabelStyle createInsideLabelStyle() {
                 .fontSize(12)
                 .italic(true)
                 .labelColor(this.colorProvider.getColor(ViewConstants.DEFAULT_LABEL_COLOR))
-                .showIconExpression("aql:false")
+                .showIconExpression(AQLConstants.AQL_FALSE)
                 .withHeader(true)
                 .build();
     }

backend/views/syson-diagram-common-view/src/main/java/org/eclipse/syson/diagram/common/view/services/ViewFilterSwitch.java

@@ -42,10 +42,6 @@
  * compartments.
  * </p>
  * <p>
- * In Interconnection View, the nested Nodes should not be displayed. They are handled by other NodeDescriptions, inside
- * compartments.
- * </p>
- * <p>
  * Root elements return true for this switch because the NodeDescriptions calling ViewNodeService#getExposedElements are
  * the same for root and nested Nodes.
  * </p>

backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/SDVDiagramDescriptionProvider.java

@@ -413,7 +413,7 @@ private List<IDiagramElementDescriptionProvider<?>> createAllCompartmentNodeDesc
         compartmentNodeDescriptionProviders.addAll(this.createCompartmentsForNestedAction(colorProvider));
 
         // Compartment "interconnection" (many usages and defintions) is defined for:
-        // PartUsage
+        // PartUsage, PartDefinition
         compartmentNodeDescriptionProviders.addAll(this.createInterconnectionCompartment(colorProvider));
 
         // Compartment "state transition" (OwnedState) is defined for:
@@ -514,6 +514,7 @@ private List<IDiagramElementDescriptionProvider<?>> createInterconnectionCompart
         final List<IDiagramElementDescriptionProvider<?>> compartmentNodeDescriptionProviders = new ArrayList<>();
 
         compartmentNodeDescriptionProviders.add(new InterconnectionCompartmentNodeDescriptionProvider(SysmlPackage.eINSTANCE.getPartUsage(), colorProvider, this.getDescriptionNameGenerator()));
+        compartmentNodeDescriptionProviders.add(new InterconnectionCompartmentNodeDescriptionProvider(SysmlPackage.eINSTANCE.getPartDefinition(), colorProvider, this.getDescriptionNameGenerator()));
 
         return compartmentNodeDescriptionProviders;
     }
@@ -1058,6 +1059,9 @@ private void linkInterconnectionCompartment(IViewDiagramElementFinder cache) {
         cache.getNodeDescription(this.getDescriptionNameGenerator().getNodeName(SysmlPackage.eINSTANCE.getPartUsage()))
                 .ifPresent(nd -> cache.getNodeDescription(this.descriptionNameGenerator.getFreeFormCompartmentName(InterconnectionCompartmentNodeDescriptionProvider.COMPARTMENT_NAME))
                         .ifPresent(nd.getReusedChildNodeDescriptions()::add));
+        cache.getNodeDescription(this.getDescriptionNameGenerator().getNodeName(SysmlPackage.eINSTANCE.getPartDefinition()))
+                .ifPresent(nd -> cache.getNodeDescription(this.descriptionNameGenerator.getFreeFormCompartmentName(InterconnectionCompartmentNodeDescriptionProvider.COMPARTMENT_NAME))
+                        .ifPresent(nd.getReusedChildNodeDescriptions()::add));
     }
 
     private void addCompartmentNodeDescriptionInNodeDescription(IViewDiagramElementFinder cache, NodeDescription compartmentNodeDescription, EClass eClass) {

doc/content/modules/user-manual/pages/release-notes/2025.10.0.adoc

@@ -73,6 +73,7 @@ This issue was not visible in SysON but could appear in downstream applications
 Now it is only available on SysML model elements.
 - Fix library update performance and ensure it does not impact standard libraries.
 - Fix an issue where diagrams' edges were blinking when refreshing a diagram.
+- Add _interconnection_ compartment to `PartDefinition` nodes in the standard diagrams.
 
 == Improvements