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Re: Why Model Concepts? (Was RE: Object Role Modelling (ORM) or UML or??for designing Schemas)
- From: Ken North <ken_north@compuserve.com>
- To: xml-dev@lists.xml.org
- 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