[1860] Add preconditionExpression to CompartmentItemNodeDescriptionPr…

CHANGELOG.adoc

@@ -79,6 +79,8 @@ A new compartment named _satisfy requirements_ has also been added to `PartDefin
 - https://github.com/eclipse-syson/syson/issues/1818[#1818] [diagrams] On _Interconnection View_ diagrams, the top-level palette no longer proposes to create `Attributes` and `Ports`, which can not actually be displayed on the diagram's background.
 The tools are still available in the palette of e.g. `Parts`.
 - https://github.com/eclipse-syson/syson/issues/1819[#1819] [diagrams] In diagrams, when using _direct edit_ tool, you can now set a _multiplicity range part_ [n..n] after or before a _typing part_, _subsetting part_ or _redefinition part_.
+- https://github.com/eclipse-syson/syson/issues/1860[#1860] [diagrams] Add a precondition for item node descriptions in order to filter out inherited types.
+For example `Element` of type `ViewUsage` are no longer rendered in _part_ compartments despite inheriting from `PartUsage`.
 
 === New features
 

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

@@ -60,12 +60,14 @@ public CompartmentItemNodeDescriptionProvider(EClass eClass, EReference eReferen
 
     @Override
     public NodeDescription create() {
+        var qualifiedName = SysMLMetamodelHelper.buildQualifiedName(this.eClass);
         return this.diagramBuilderHelper.newNodeDescription()
                 .defaultHeightExpression(ViewConstants.DEFAULT_COMPARTMENT_NODE_ITEM_HEIGHT)
                 .defaultWidthExpression(ViewConstants.DEFAULT_NODE_WIDTH)
                 .domainType(this.getDomainType())
                 .insideLabel(this.createInsideLabelDescription())
                 .name(this.getName())
+                .preconditionExpression("aql:self.oclIsTypeOf(" + qualifiedName + ")")
                 .semanticCandidatesExpression(this.getSemanticCandidateExpression())
                 .style(this.createCompartmentItemNodeStyle())
                 .userResizable(UserResizableDirection.NONE)

doc/content/modules/user-manual/pages/release-notes/2026.1.0.adoc

@@ -95,6 +95,7 @@ package root {
 ** New `Expose` elements now have `visibility` set to _protected_ and have `isImportAll` set to _true_, as required by the SysMLv2 specification.
 ** Correct the computation of a `Feature`'s types to properly account for subsetted features.
 ** Fix focus loss on some characters in the _New object from text_ modal.
+** Fix an issue where the some type of `Element` could appear in the wrong compartment if they shared a common type with said compartment, for example `ViewUsage` could appear in the _part_ compartment since it extends `PartUsage`.
 
 == Improvements