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Re: Why Model Concepts? (Was RE: Object Role Modelling (ORM) or UML or??for designing Schemas)




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