- From: (unknown charset) Henry S. Thompson <ht@inf.ed.ac.uk>
- Date: Tue, 24 Jan 2006 15:35:04 +0000
- To: (unknown charset) (unknown charset) François Yergeau <francois@yergeau.com>
- Cc: (unknown charset) public-xml-core-wg <public-xml-core-wg@w3.org>
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Could someone convince me that we _shouldn't_ do what Bjoern suggests
here, i.e. include an appeal to Unicode Normalization [C] in the new
universal IRI->URI algorithm?
Doing so will remove a potential serious roadblock for XLink 1.1.
I'm far from being an expert on this area, but to my naive eyes his
argument (which is a reply to my claim that Character Encoding rules
don't apply to IRI->URI mapping for XML specs, because they all start
From=20infoset values, which are defined as sequences of Unicode code
points) seems valid.
ht
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From: Bjoern Hoehrmann <derhoermi@gmx.net>
To: ht@inf.ed.ac.uk (Henry S. Thompson)
Cc: www-tag@w3.org
Date: Tue, 13 Dec 2005 19:10:03 +0100
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References: <20051212154138.7a71f0ff.Vincent.Quint@inrialpes.fr> <4bdtp1p5tq99u6f7bqlrgarfg980kjvu1t@hive.bjoern.hoehrmann.de> <op.s1p3xerix1753t@ibm-60d333fc0ec.customers.eurospot.com> <qfitp19u9qs4eib2ss166gbphht88481ki@hive.bjoern.hoehrmann.de> <f5bzmn5t11e.fsf@erasmus.inf.ed.ac.uk>
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* Henry S. Thompson wrote:
>Precisely. IRI-to-URI processing for XML is only coherently
>understood as a process that is defined in the terms provided by the
>Infoset spec., where _all_ values are sequences of Unicode code
>points.
Well, then you have this step,
If the IRI is written on paper, read aloud, or otherwise represented
as a sequence of characters independent of any character encoding,
represent the IRI as a sequence of characters from the UCS normalized
according to Normalization Form C (NFC, [UTR15]).
I.e., you always normalize. Could you elaborate on why e.g. the XML Core
Working Group did not adopt this step in the various specifications that
define string-to-URI conversion (XML 1.0, XML 1.1, XInclude, XLink, ..)?
The normalization step has been in the various IRI drafts for more than
7 years now and
The XML Core WG would also like TAG input on the wisdom of early
adoption given the "Internet Draft" status of the IRI draft [10]. So
far adoption has relied on "copy and paste", but there is potential
for these definitions to get out of sync.
out of sync specifications were a concern when the issue was raised.
=2D-=20
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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@inf.ed.ac.uk
URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged sp=
am]
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Received on Tuesday, 24 January 2006 15:35:10 UTC