Re: Peter Chen and Charles Bachman
From: Leandro Guimarães Faria Corsetti Dutra <leandro_at_dutra.fastmail.fm>
Date: Wed, 05 May 2004 20:08:13 -0300
Message-ID: <pan.2004.05.05.23.08.13.556059_at_dutra.fastmail.fm>
>
> Well, the definition is often there, but it is incorrectly mapped to the
> word "relation" instead. It is a relationship (in mathematics) that is
> unordered, as someone else recently pointed out in the glossary
> discussions.
Date: Wed, 05 May 2004 20:08:13 -0300
Message-ID: <pan.2004.05.05.23.08.13.556059_at_dutra.fastmail.fm>
Em Wed, 05 May 2004 17:29:50 -0500, Dawn M. Wolthuis escreveu:
>> Useless talk, since none of these gives you a data model as the RM does.
>
> If models are metaphors, can't a diagram provide such a metaphor?
A database isn't a simple metaphor. It is a representation of a database.
Speaking about metaphors will only confuse things now.
>> Hey, go back to your textbooks. Relationships aren't defined in the RM.
>
> Well, the definition is often there, but it is incorrectly mapped to the
> word "relation" instead. It is a relationship (in mathematics) that is
> unordered, as someone else recently pointed out in the glossary
> discussions.
Hm, I see you don't want to learn, only to win the discussion... I won't play this game.
-- Leandro Guimarães Faria Corsetti Dutra +55 (11) 5685 2219 Av Sgto Geraldo Santana, 1100 6/71 +55 (11) 5686 9607 04.674-000 São Paulo, SP BRASIL http://br.geocities.com./lgcdutra/Received on Thu May 06 2004 - 01:08:13 CEST