[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Why Model Concepts? (Was RE: Object Role Modelling (ORM) or UML or??
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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