What does it mean when I place an association from a Class A to 
a supertype X with subtypes X1 and X2?

Does it mean that A <-> X1 XOR A<-> X2 ?

If so, is this not a better notation?

Les.

P.S. Or does it mean A <-> X1 AND A<-> X2 ?

---- On Tue, 7 Jan 2003, Dunnavant, Todd 
([EMAIL PROTECTED]) wrote:

> You would place a constraint relation between the 
associations that are
> being XORed, then label the constraint "XOR", or whatever 
suits your fancy.
> 


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