PPMN_ — Line 984 Table 5 Description of attribute part is ambiguous

The description of Entity attribute part which is a derived attribute says: the Entity or Entities that is/are contained by the Entity.
This may be ambiguous and misleading since the notion of containment differs from the notion of composition. The attribute part is derived so we should be explicit about its computation which in this case is the collection of all EntityRelationships of kind Composition from SCE ElementRelationship RelationshipKind.