• From: Ken North <ken_north@c...>
• To: xml-dev@l...
• Date: Fri, 16 Feb 2001 07:31:55 -0800

Different perspectives (conceptual schema, physical schema, user view) were
defined in the 70s by the ANSI/X3/SPARC Study Group on Database Management
Systems.

This paper has an explanation:
http://www.nist.gov/sc4/wg_qc/wg10/current/n089/wg10n089.pdf

conceptual model: description of the content, the structure, the rules, and
behaviour in a universe of discourse

This paper discusses the advantages of physical data independence in a
hypermedia context:
http://www.dke.uni-linz.ac.at/research/publications/abstracts/Prue96c.html

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    • From: Rick Jelliffe <ricko@a...>

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