Generic or specific
From: gkiourtas michail <michgkio_at_otenet.gr>
Date: 2000/04/11
Message-ID: <38F32DF6.8F1A8448_at_otenet.gr>#1/1
Date: 2000/04/11
Message-ID: <38F32DF6.8F1A8448_at_otenet.gr>#1/1
For a lending library project:
a) Is book and a copy of this book an unary relationship?
b) Is book a generic entity and a copy of it a specific entity?
Thanks to all of you. Received on Tue Apr 11 2000 - 00:00:00 CEST