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Re: "External" Attributes in Element of XML Instance

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 11 Mar 2003 09:16:51 +0000
To: "Liu, Hong" <Hong.Liu@neustar.biz>
Cc: "'xmlschema-dev@w3.org'" <xmlschema-dev@w3.org>
Message-ID: <f5bu1ea2rgc.fsf@erasmus.inf.ed.ac.uk>

"Liu, Hong" <Hong.Liu@neustar.biz> writes:

> It seems to me that one can put any QName attribute in the start tag of an
> element in an XML instance document, as long as the attribute is globally
> defined in a namespace other than the target namespace (if exists) of the
> schema for the instance document. Is this true? Thanks!

Not quite -- just as for DTDs, schema-validity requires _some_ kind of
declaration for attributes -- what you're thinking of would involve an
attribute wildcard, e.g.

  <anyAttribute namespace="##other"/>

Including this in a type definition would allow any number of
attribute with an explicit prefix declared as a namespace _other_ than
the target namespace of the containing schema.

  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                      Half-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/
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Received on Tuesday, 11 March 2003 04:16:53 UTC

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