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Re: [SVGMobile12] more on data types

From: Chris Lilley <chris@w3.org>
Date: Fri, 30 Jun 2006 16:16:42 +0200
Message-ID: <558398305.20060630161642@w3.org>
To: "Doug Schepers" <doug.schepers@vectoreal.com>
Cc: "'Anne van Kesteren'" <annevk@opera.com>, www-svg@w3.org

On Tuesday, June 27, 2006, 11:23:41 PM, Doug wrote:

DS> * match [Definition: (Of strings or names:) Two strings or names being
DS> compared MUST be identical. Characters with multiple possible
DS> representations in ISO/IEC 10646 (e.g. characters with both precomposed and
DS> base+diacritic forms) match only if they have the same representation in
DS> both strings. No case folding is performed. (Of strings and rules in the
DS> grammar:) A string matches a grammatical production if it belongs to the
DS> language generated by that production. (Of content and content models:) An
DS> element matches its declaration when it conforms in the fashion described in
DS> the constraint [VC: Element Valid].]

Or in other words, if two e-acutes are not matched (because one is a
pre-combined eacute and the other is an e with a combining acute accent)
then its pretty clear the "A" and "a" don't match.

Anne, if you wish to suggest a revision of XML which is case-insensitive
throughout, please contact public-xml-core-wg@w3.org with a
detailed proposal.

DS> In any case (no pun intended), the strict string matching is
DS> unquestionably defined in XML, so this point is not open to
DS> interpretation.


DS> It's not that simple. There are other languages and tools to attempt
DS> compatibility with, so a conservative approach to supported values
DS> converges with more specifications than a liberal one.

Specifically it converges with XSL which being written in XML, uses
case-sensitive string comparison in conformance with the
XML specification.

DS> It does look like this case is problematic. I will recommend that we
DS> remove the normative reference to HTML,

Its an informative reference, by the way.

 Chris Lilley                    mailto:chris@w3.org
 Interaction Domain Leader
 Co-Chair, W3C SVG Working Group
 W3C Graphics Activity Lead
 Co-Chair, W3C Hypertext CG
Received on Friday, 30 June 2006 14:16:49 UTC

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