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> The spec seems to suggest that XML documents are valid only if a DTD > is associated with the XML document. That is not a "suggestion". valid is a technical term defined in the XML specification and that's a necessary condition for validity. > I don't mind validating XML documents with other technologies like > RelaxNG or Schematron, if there is a need for me to do so. But I > think, existence of technologies like RelaxNG or Schematron cannot be > an excuse for XML spec, not to mention XSD within it as a validating > technology. Whether or not a document validates against an XSD or schematron schema has no bearing on whether or not it is a valid as opposed to merely well formed XML document. You seem to want "valid" to mean validated against any schema language of your choice, that's OK (but confusing) if used in conversation, but it is not the way the term "valid" is defined in XML. XSD, RelaxNG, Schematron all depend on XML; not the other way round. They require normative references to XML, it would be entirely backwards (or worse, circular) for XML to reference them. David ________________________________________________________________________ The Numerical Algorithms Group Ltd is a company registered in England and Wales with company number 1249803. The registered office is: Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom. This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. ________________________________________________________________________
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