using exclusive arc

From: Marc Lambrichs <marcl(at)xs4all(dot)nl>
To: pgsql-general(at)postgresql(dot)org
Subject: using exclusive arc
Date: 2001-09-24 05:58:10
Message-ID: 9oo3ps$7ds$1@news1.xs4all.nl
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Hi all,
I want to implement an exclusive arc of my ERD in postgres. I figure, some
check constraint has to be made. Where can I find an example?

Cheers,
Marc

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