Rath on 19 March 2010
I get that it's a disjoint specialization, my problem is with the participation and cardinality.
I have a single relationship 'HAS_A' from 'B', however 'A1' and 'A2' both of which are related to B through 'HAS_A' have different cardinality and participation. Does this mean I have to create two 'HAS_A' relationships, one between B and A1 and one between B and A2 or is there some way to do it with a single relationship.
