Re: One to One Relationship

Frank <fvanbortel_at_netscape.net> wrote in message news:<3E78C0BC.4000109_at_netscape.net>...
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> That would be 2 instantiations of the attribute engine.

Not at all. Attributes are not instantiated. Entities are. So at the most, it would be two instantiations of entity engine, possibly linked to a particular aircraft. But here is where reality hits: each engine in an aircraft is a different part of the aircraft, as far as for example maintenance is concerned. In the case of an FA18, you got left and right engine. Each with different maintenance rates, timings, etc. We can of course separate into its own entity, but we'd need two, one for each engine "side". Or a sub-type. Which turns it into a 1:1. I won't even go into a P3C, where even each engine can be of different make... :D

Cheers
Nuno Souto
wizofoz2k_at_yahoo.com.au.nospam Received on Wed Mar 19 2003 - 17:15:38 CST