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Re: If I want to use catalogs for XSDs, must document instance

• From: Victor Porton <porton@narod.ru>
• To: xml-dev@lists.xml.org
• Date: Mon, 23 Apr 2012 23:44:41 +0300

23.04.2012, 23:28, "Liam R E Quin" <liam@w3.org>:
> On Mon, 2012-04-23 at 12:31 +0200, Jirka Kosek wrote:
>
>> Å¡Might be I'm not understanding you correctly Liam, but IMHO namespace
>> Å¡URI is perfect way to *indirectly* say where the schema is located.
>>
>> Å¡Good XML application support mapping file where namespace URI can be
>> Å¡mapped to schema which should be used for validation.
>
> Yes, that aspect is fine. Blindly dereferencing the namespace and
> expecting to find a schema there is what I was saying is not fine.

I am writing a standard about what should be located at namespace URLs.

This should contain not only schemas (of any kind) but also rules for transformations between different namespaces.

I think this is an important standard (when I will release a good draft), but we need work on its promotion to become an agreed industry standard. Your help to promote it could be essential.

http://freesoft.portonvictor.org/binaries/Namespace_Semantic.doc

>> Å¡In theory on namespace URI could reside RDDL document which can point to
>> Å¡XML schema, but past experience with heavy loaded network resources
>> Å¡(XHTML DTDs) shows that's not wise to depend on such approach in an
>> Å¡application.
>
> The XML Plenary failed to get consensus on whether it was acceptable to
> define anything at a namespace URI, or even if it was OK to try to
> dereference them.
>
> If applications did start, you're right, W3C would have to block the
> ones on our servers, as we have to do for the DTDs and XSD files.


-- 
Victor Porton - http://portonvictor.org

• Follow-Ups:
  • Re: If I want to use catalogs for XSDs, must document instances contain a schemaLocation?
    • From: ht@inf.ed.ac.uk (Henry S. Thompson)
  • Re: If I want to use catalogs for XSDs, must document instances contain a schemaLocation?
    • From: "G. Ken Holman" <gkholman@CraneSoftwrights.com>