Re: definitions for conceptual, logical, physical

From: mAsterdam <mAsterdam_at_vrijdag.org>
Date: Fri, 23 Jun 2006 22:08:43 +0200
Message-ID: <449c49d5$0$31656$e4fe514c@news.xs4all.nl>

Marshall wrote:
> Hi all,
>
> We use these terms a lot: conceptual, logical, physical.
>
> I believe I have a good intuitive understanding of these
> terms and how they are used. However, an intuitive
> understanding and a formal definition are not the same
> things!
>
> Anyone have formal definitions for the above terms?
> Citations?

Not yet an answer, but maybe helpful to those also looking for one:
ANSI-SPARC Three-level Architecture has

- external
- conceptual
- physical

First time I heard about 'logical' (between conceptual and physical) was in the context of relational databases. Received on Fri Jun 23 2006 - 15:08:43 CDT