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On 12/13/2013 8:25 PM, Hans-Juergen Rennau wrote: Let's back off a bit. XML is a language for *creating* markup languages. No more than that. Some of those languages may do something of what you said. Many or most will not. XML per se has no data model beyond e.g. elements, attributes, and the like. Adding XPATH adds no semantics besides associating certain URIs with certain elements.My position is that XML implicitly creates a global space of information, a space which *is* a space (= something providing for "location" and "movement") because of XPath. I view XML and XPath - the models of representation, of information content, of content navigation - as a single unit, facets of which are syntax, data model, navigation model. Actually, *RDF* can be thought of as creating an implicit space of the type you speak of. And although there is a standard XML representation for RDF, there are many other non-XML ones too.
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