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RE: [xml-dev] XML spec and XSD

> This particular paragraph clearly conveys, that a XML 
> document is valid *only* in the context of a DTD. This is no 
> longer true given that XSD, RelaxNG and Schematron are also 
> standard based XML validation languages, and most of the 
> world recognizes these newer Schema languages.

When the XML specification uses the word "entity", it means something
entirely different from what the UML spec means by "entity". That does not
make the things it says about entities untrue: it just means that the reader
has to be careful to remember what the meaning of the word is in the context
of a particular specification. Similarly, the word "valid" in the XML
specification has a different meaning from its use in the XSD specification.
Also similarly, the word "processor" in the XML specification means
something different from "processor" in the XSLT specification. Such
differences are entirely legitimate. When discussing technology in a wider
context, it's often wise to qualify your language to avoid misunderstanding,
by talking of an "XML entity" or an "XML processor" or of documents being
"DTD-valid". But it would be tedious to do that within a specification,
where it's hard enough to avoid 6-tuple compound nouns at the best of times.


Michael Kay

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