[news.eclipse.modeling.mdt.uml2.uml] creating new metaclasses

[Rafael Chaves <chaves@xxxxxxxxxxxxxxxxxx>]

We need to create new metaclasses to use in our UML models. After
spending a long time looking in the archives for information on how to 
extend the UML metamodel, we figured we should use the heavyweight 
approach, because we need to generate the API for programmatically 
creating models that make use of the new action metaclasses (please 
correct me if this does not make sense).

In order to do that, this is the path we took:

1) created a new custom.genmodel from the custom.uml declaring the new 
metaclasses that extend UML standard metaclasses

2) created a corresponding new custom.genmodel

3) generated code for the model

However, the implementation for the API generated extends the 
implementation from the UML2 UML API. That is bad because the 
implementation classes are not API. Should we just live with all those 
"Discouraged access" warnings, or is there a cleaner way?

Thanks,

Rafael