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Re: extensibility in XSchema?

• From: Peter Murray-Rust <peter@u...>
• To: rbourret@d... (Ron Bourret),xml-dev@i...
• Date: Wed, 01 Jul 1998 08:21:52

At 19:17 30/06/98 +0200, Ron Bourret wrote:
[...]
>By the way, I'm currently writing an XSchema-to-DTD processor built on top
of 
>SAX (first version available tomorrow if I figure out namespaces), but my
next 
>project will be an XSchema conformance checker also built on SAX.
Assuming this 
>code also generates SAX events, it can be easily be reused by others, so 
>conformance becomes even less of a problem.

This is wonderful Ron.

As for namespaces - I think it's worth *experimenting* and publishing our
results. Remember that (a) the final version is not there (b) namespaces
are not required to *do* anything other than uniquify names. I would advise
against attaching any semantics to any part of the current public namespace
draft. I think following the current public draft minimally and faithfully
will be valuable.

In JUMBO I have started to apply a minimalist approach the namespaces which:
	- can generate a UniqueName by the concatenation of the prefix and the
local name
	- checks for uniqueness as required by the draft
	- can retrieve the Namespace determined by a prefix
and that's all.

	Clearly you have to use the UniqueName in the interpretation of the Schema
just as a validating parser might have to expand the name and check it
against a namespace-aware DTD (if/when such a thing exists).

	P.

>
>-- Ron Bourret
>
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Peter Murray-Rust, Director Virtual School of Molecular Sciences, domestic
net connection
VSMS http://www.nottingham.ac.uk/vsms, Virtual Hyperglossary
http://www.venus.co.uk/vhg

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