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Subject: [tm-pubsubj-comment] DRAFT: Datatypes for XML Topic Maps
[My apologies if you receive this more than once; I'm posting to several topic map related lists.] I'm pleased to announce a first draft of something that's been in the works for over a year (well, put on hold for over a year). The ability to constrain or "type" topic characteristics is something necessary within the topic map community. Constraints on topic map structures may be provided by various forms of schema facilities, such as TMCL, but a simple datatyping feature is still something sorely missing. There are some examples provided in the document. "Datatypes for XML Topic Maps (XTM): using XML Schema Datatypes" Murray Altheim, Knowledge Media Institute, The Open University, 12 December 2002. See: http://kmi.open.ac.uk/psi/datatypes.html Abstract: The W3C Recommendation XML Schema Part 2: Datatypes [XSD] (hereafter called "XSD") provides a specification of datatypes and their facets, and forms the semantic basis of this document, which establishes Published Subject Indicators (PSIs) for each XML Schema datatype and facet. A PSI is a (relatively) stable URL used as a canonical identifier for a subject, particularly within an XML Topic Map [XTM] document, though application of PSIs is not limited to XTM. I welcome comments or suggestions towards establishing "best practices" for use of these PSIs, as well as comments on the structures within the provided topic map. I am willing to add visualizations of various parts of the topic map if that is considered helpful. Thanks for your consideration of this draft, Murray ...................................................................... Murray Altheim <http://kmi.open.ac.uk/people/murray/> Knowledge Media Institute The Open University, Milton Keynes, Bucks, MK7 6AA, UK If you're the first person in a new territory, you're likely to get shot at. -- ma
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