Re: [xml-dev] If I want to use catalogs for XSDs, must document instance

[ht@inf.ed.ac.uk (Henry S. Thompson)]

Jirka Kosek writes:

> Might be I'm not understanding you correctly Liam, but IMHO namespace
> URI is perfect way to *indirectly* say where the schema is located.

Indeed the W3C XML Schema specification says this explicitly [1]:

 The author of a document uses namespace declarations to indicate the
 intended interpretation of names appearing therein; it is possible
 but not guaranteed that a schema is retrievable via the namespace
 name.

> Good XML application support mapping file where namespace URI can be
> mapped to schema which should be used for validation. Graham should
> inspect his tool whether it provides such facility. In oXygen there is
> Document Type Association option for this, Emacs+nxml support
> locatingRules, NVDL can be used for this as well.

XSV supports RDDL at the namespace URI for this purpose, and gives
user control on whether namespace URIs are dereferenced or not.

ht

[1] http://www.w3.org/TR/xmlschema11-1/#schema-loc
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       Henry S. Thompson, School of Informatics, University of Edinburgh
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