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Re: XML Schema XPath subset: NCName:*

From: Henry S. Thompson <ht@inf.ed.ac.uk>
Date: Thu, 12 Feb 2004 13:34:42 +0000
To: "Michael Kay" <mhk@mhk.me.uk>
Cc: <www-xml-schema-comments@w3.org>
Message-ID: <f5by8r82zgt.fsf@erasmus.inf.ed.ac.uk>

"Michael Kay" <mhk@mhk.me.uk> writes:

> In section 3.11.6 of XML Schema Part 1, the production rule is given:
>
> [4]  NameTest ::= QName | '*' | NCName ':' '*'	
>
> This creates the impression that spaces are allowed either side of the
> ":" in NCName:*, and some schema processors (e.g. Xerces) appear to
> allow such spaces.

As published, the REC doesn't allow any whitespace _at all_ in
patterns, per the XML 1.0 interpretation of EBNF.

Following a comment [1], an erratum [2] was issued clarifying that
whitespace was allowed as per XPath 1.0.  This clarification does not
allow whitespace between the tokens of a NameTest.

ht

[1] http://www.w3.org/2001/05/xmlschema-rec-comments.html#pfiIdConstrWhiteSp
[2] http://www.w3.org/2001/05/xmlschema-errata#e1-6
-- 
 Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                     Half-time member of W3C Team
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            Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
                   URL: http://www.ltg.ed.ac.uk/~ht/
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Received on Thursday, 12 February 2004 08:34:48 UTC

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