Change to the public schema document for the XML namespace (xml.xsd)

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The schema document at http://www.w3.org/2001/xml.xsd has changed, in
order to (belatedly) track the change to xml:lang in XML 3rd edition [1],
which now allows the empty string as well as a language code.

Per the standard change policy, the old version is still available [2] and
will not be changed.

A copy of the new version which will never change is also available [3].

ht, on behalf of the W3C XML Core Working Group

[followups to , please]

[1] http://www.w3.org/TR/REC-xml/#sec-lang-tag
[2] http://www.w3.org/2004/10/xml.xsd
[3] http://www.w3.org/2005/08/xml.xsd
- -- 
 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: 
                   URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]
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