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   Re: Namespaces and URNs

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  • From: John Cowan <cowan@locke.ccil.org>
  • To: XML Dev <xml-dev@ic.ac.uk>
  • Date: Thu, 06 Aug 1998 16:48:24 -0400

Dean Roddey wrote:

> Ok, so I'm searching the 300,000 acronyms in my head and FPI is not popping up
> :-) Did I miss class that day? What does FPI stand for?

Formal Public Identifiers.  A convention for defining public identifiers.

> Then the parser could see, even if a DTD came in from different sources via
> different URIs, that in effect they were the exact same version and that
> subsequent instances of the DTD could be just ignored and the current content
> used?

Namespace names don't have to be dereferenceable:
"http://www.ccil.org/~cowan/labor_yutz" is a perfectly good namespace name,
even though there's nothing there (you'll get an error if you
try to dereference it), because I assigned it and the namespace
names beginning http://www.ccil.org/~cowan" belong to me.

In particular, there is no reason why the referent of the namespace
name should be a DTD.

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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