UML14 — UML 2 Super/Metamodel/merging of non-redefinable model elements

Model elements, like Constraint, that are not RedefinableElements are always copied from the merged model element to the merging model element. When a package like Kernel is merged into many packages which are then in turn merged into another common package, these non-redefinable elements are copied down multiple times in the leaf merging package. For example, L3::Classifier has a large number of ownedRules named general_equals_parent which it gets from Dependencies::Classifier. Dependencies is merged into Kernel which is merged into many packages in Superstructure. Perhaps a Constraint should be a RedefinableElement, or package merge should only copy down these elements once

see above