• To: "'Bill Riegel'" <BRiegel@l...>, xml-dev@l...
• Subject: RE: key constraint question
• From: Jeff Lowery <Jeff.Lowery@c...>
• Date: Fri, 16 May 2003 10:17:44 -0700

Why not have a single, mandatory Primary relation A -> B, with B maintaining
the secondary optional relation: B -> B'?   You can get from A -> B' via
A->B->B' navigation.

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