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   RE: [xml-dev] RDDL (was RE: [xml-dev] Negotiate Out The Noise)

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>-----Message d'origine-----
>De : Jonathan Borden [mailto:jborden@mediaone.net]
>Envoyé : vendredi 18 janvier 2002 16:00
>À : Nicolas LEHUEN; 'Paul T'; 'Bullard, Claude L (Len)'; 'Leigh Dodds';
>Objet : Re: [xml-dev] RDDL (was RE: [xml-dev] Negotiate Out The Noise)
>> >But anyway, I think there are two problems that RDDL try to
>> >solve in the
>> >same document and that should be separated : resource linking and
>> >human-readable documentation.
>> And once again, RDDL try to solve it the wrong way, by its 
>assumption that
>> resource description and linking has something to do with namespaces.
>Don't get caught up in the term "Resource". I am sorry that it 
>is used, but
>so be it. I am not sure that the term "Resource" has any real 
>meaning, but
>it is thrown about on the Web. Note that the RFC 2396 (URI) 
>usage of the
>term "Resource" means anything that has a URI. Namespaces are 
>named using
>URIs hence the term "Resource". There is nothing other to read 
>into this.
>RDDL does not intend to be RDF.

OK. Following RFC 2396, namespaces are resources because they have an URI.
But resources aren't namespace. Hence, RDDL should be named NDL.

>> RDDL was NDL (Namespace Description Language), there would 
>be no problem.
>> You would describe namespaces and link to resources to those 
>> as I wrote earlier, I don't think that RDDL is appropriate to handle
>> resources that contain mixed namespaces.
>What do you mean by "appropriate"? If somewhat writes a 
>software program in
>Java that processes mixed namespaces, would that be 
>"appropriate"? Either it
>can or cannot be done. Henry has shown that it can be done. Simple.
>"Appropriate"ness has no bearing. What is the real issue?

When you write about Henry [Thompson], do you refer to this :
http://lists.w3.org/Archives/Public/xmlschema-dev/2001Jun/0048.html ?

How is this related to mixing different namespaces in the same document ?

All I understand is that instead of directly providing the schema URL for
validation, you can provide a RDDL URL (e.g. the namespace URL for which you
expect a schema), and then XSV fetches the RDDL document and from there a
XML Schema document according to the following rule :

"The first <rddl:resource> whose
xlink:role="http://www.w3.org/2001/XMLSchema"; will be used.  Support for
RDDL at the end of the 'schemaLocation' attribute of <xs:include> and
<xs:import> will follow shortly."

The status page : http://www.ltg.ed.ac.uk/~ht/xsv-status.html only mentions
"Support RDDL at e.g. namespace URIs ". So how do you relate this to mixed
namespaces in the same document ?



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