DDL Transformation

[SGREEN]

I am very new to EA and to UML.... (But lots of experience in ER modelling with other CASE tools)

I am creating a class model which will be used to generate both DDL and XML.

I have a number of superclass/subclass as well as supertype/subtype requirements where the SUPER class/type does not have any attributes and other where they do have attributes.  Instead of simply creating "TYPE" attributes in the classes, I was hoping to create abstract classes.

Is there any way to have the DDL transformer merge two classes?  No matter what I try, the DDL transformer creates <table> classes with PK/FK relationships.

Ultimately, I believe my problem lies with the fact that EA states that it does not support copy down inheritance.

What am I doing wrong?

Thanks,