Problems validating the W3C schema DTD's

[Paul Prescod]

Andrew Layman wrote:
> 
> The MSXML parser requires that any "xmlns" attribute declared in a DTD must
> be FIXED because, if you want to use the DTD to validate an instance, you
> must use exactly the same prefixes in the instance as were used in the DTD.

Nevertheless the parser rejects documents that are valid both according to
the XML and XML namespaces specification.

> Looking at the same point from another angle, DTDs do not treat namespace
> prefixes as symbolic intermediaries, but instead as ordinary characters in
> element and attribute names.  As such, their binding is fixed by the author
> of the DTD, and any alteration of the binding in a document instance would
> produce an instance no longer described by that DTD. 

When that occurs you can signal the error.

-- 
 Paul Prescod  - ISOGEN Consulting Engineer speaking for only himself
 http://itrc.uwaterloo.ca/~papresco

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