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Hi, Isn't XML Information Set what you want here (see http://www.w3.org/TR/xml-infoset/). Taxonomy is defined as the "science and practise of classification" (in my convenient dictionary application), and as far as I understand, that's what the XML Infoset is for. Best, /Ari Rick Marshall wrote... > > hi all > > following several discussions we've had lately, mostly on relational > models and document management i'm going to float the idea - which may > be covered elsewhere, please redirect me if appropriate - > that having a > taxonomy of xml may help us to understand what forms, and > when are good > for different problems. > > if we take numbers as an analogy (and that's all it is, there > are plenty > of others) they can be divided into sets - integer, real, rational, > irrational, complex, etc and we increase our understanding and use of > numbers by developing theorems that cover the different sets. > > it seems to me that xml is as diverse as numbers or any > similar grouping > and that by focusing on well defined sets of xml structures and their > properties we can get the theorems to improve our use and > understanding. > > eg one set might be xml with tags only - no attributes; > another might be > xml that is constrained to two levels; etc > > by understanding the properties and operators that are valid on these > sets we can then see the analogies to other technologies such as > relational models, markup, etc. > > just a thought at the moment > > cheers > > rick > >
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