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   Re: Summary of Namespaces and Validation

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  • From: John Cowan <cowan@locke.ccil.org>
  • To: XML Dev <xml-dev@ic.ac.uk>
  • Date: Fri, 11 Sep 1998 11:01:23 -0400

Liam R. E. Quin wrote:

> If a DTD refers to multiple external definition sets, with multiple
> prefixes, it is necessary to determine the source of each referenced
> element type, which may require a two-pass algorithm to collect all
> of the element definitions and then associate them with the right
> prefixes.  The fact that an element type can be referred to before
> it is declared makes this slightly more complex, but is necessary...

One pass is sufficient, even if prefixes are not defined before
they are referenced, provided that the default prefix is declared
> Tim, what am I missing?  Apart from the face that we lack a good
> way to associate a DTD or DTD fragment with a prefix, I mean?

Nothing as far as I can see.  Of course the result is not SGML-compliant
DTD-based validation, but it is validation of XML using DTDs.

John Cowan	http://www.ccil.org/~cowan		cowan@ccil.org
	You tollerday donsk?  N.  You tolkatiff scowegian?  Nn.
	You spigotty anglease?  Nnn.  You phonio saxo?  Nnnn.
		Clear all so!  'Tis a Jute.... (Finnegans Wake 16.5)

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