I discovered the annotation @MappedSuperClass which does exactly what I intend to achieve. However; there is a new situation with this. I now have a class (@MappedSuperClass) called MappedClass which an @Entity called Entity extends. I now want to extend Entity with another @Entity called TransactionEntity, but this results in the error message: The type Entity cannot be the superclass of TransactionEntity; a superclass must be a class This is not what the final draft on persistence states: anonymous wrote : Both abstract and concrete classes can be entities. Entities may extend non-entity classes as well as | entity classes, and non-entity classes may extend entity classes. Is there a way to achieve a @MappedSuperClass with several subs which is entites? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959859#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...