[news.eclipse.modeling.gmf] extending the Diagram notation interface

["Theo" <NOSAPM@xxxxxxx>]

Hello everybody,
I extended the Diagram because I need to introduce some additional 
references.
Is it possible to hook the new "MyDiagram" EClass by means of the tooling?

The only point I could think of is in the .gmfgen - the Diagram Element / 
Diagram Run Time Class
property of  the "Gen Diagram XXXEditPart" .

I loaded my new notational .ecore in the .gmfgen and expected the new 
"MyDiagram" type to
appear as a choice in the said "Diagram Run Time Class" combo. It didn't, 
however  : (

Whet is the right way to hook a new Diagram notation type to the generated 
editor?

By the way, in that "Diagram Run Time Class" combo one can choose between 
the
Ecore types ( EClassifier, EObject ...) and notation types ( View, Edge 
...).
Isn't this misleading? Does "Diagram Run Time Class" mean the ruin-time 
class of
the semantic element or the view element?
Cheers,
Theo