CWM12 — Make it easier to interchange UML Models

CWM uses a subset of UML for practical reasons. It also delegates the modeling of Object Oriented resources to that subset. However the way this is currently done makes it unnecessarily hard to take a model exported from a UML tool and import it as the model of an OO resource in CWM.

CWM should provide support e.g. via metamodel and/or documented best practice (e.g. use of XMI namespaces) for this.