Re: Peter Chen and Charles Bachman

From: Leandro Guimarães Faria Corsetti Dutra <leandro_at_dutra.fastmail.fm>
Date: Tue, 04 May 2004 23:38:24 -0300
Message-ID: <pan.2004.05.05.02.38.23.931293@dutra.fastmail.fm>

Em Tue, 04 May 2004 17:16:28 -0500, Dawn M. Wolthuis escreveu:

>> Diagrams aren't models...

>
> I'll accept that diagrams, in themselves, are not full mathematical
> theories, but models they often are, it seems to me. What is your
> definition of "model" (as a noun)?

A model must include all aspects of the database, or it will be only a draft.

A diagram can hardly be expected to represent, say, all constraints in a database.

Not to mention their maintenance tends to become counterproductive as the database grows in complexity and size.

They are nice as drafts in the early stages of modelling and for presentation.

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Received on Tue May 04 2004 - 21:38:24 CDT