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Response to WebCGM 2.1 Last Call comment: i18n comment 6: Unicode

From: Thierry Michel <tmichel@w3.org>
Date: Fri, 19 Dec 2008 17:05:20 +0100
Message-ID: <494BC640.7080609@w3.org>
To: Richard Ishida <ishida@w3.org>
CC: "public-i18n-core@w3.org" <public-i18n-core@w3.org>, public-webcgm@w3.org

Dear Richard,

The WebCGM Working Group has reviewed the comment you sent [1] about the 
WebCGM 2.1 Last Call Working Draft [2] published on 02 October 2008. 
Thank you for having taken the time to review the document and send us 
comments.

The Working Group's response resolution to your comment is included below.

Please review it carefully and acknowledge this WebCGM WG response by 
replying to this mail and copying the WebCGM public mailing list 
<public-webcgm@w3.org>. Let us know if you agree with it or not before 
11 Jan 2009.  If we receive no reply from you by January 11, then we 
will default your reply to "WebCGM WG response accepted."

In case of disagreement, you are requested to provide a specific 
solution for or a path to a consensus with the Working Group.

If such a consensus cannot be achieved, you will be given the 
opportunity to raise a formal objection which will then be reviewed by 
the Director during the transition of this document to the next stage in 
the W3C Recommendation Track.

Best regards,

On behalf of the WebCGM Working Group,
Thierry Michel, WebCGM WG Team Contact.

[1] http://lists.w3.org/Archives/Public/public-webcgm-wg/2008Oct/0000.html
[2] http://www.w3.org/TR/2008/WD-webcgm21-20080917/
_____________________________________________________________
* Comment Sent: Tue, 11 Nov 2008 10:29:23 +0000
* Archived:
http://lists.w3.org/Archives/Public/public-webcgm/2008Nov/0005.html

The WebCGM WG has the following responses to your comment:
----------------------------------------------------------

SUMMARY of your comment:

Comment from the i18n review of:
http://www.w3.org/TR/2008/WD-webcgm21-20080917/WebCGM21-Config.html#ACI-fontmap

Comment 6
At http://www.w3.org/International/reviews/0811-webcgm/
Editorial/substantive: S
Tracked by: RI

Location in reviewed document:
9.3.2.2 
[http://www.w3.org/TR/2008/WD-webcgm21-20080917/WebCGM21-Config.html#ACI-maplist]

Comment:
Normalization for string comparison should include conversion to a 
Unicode normalization form, to eliminate issues related to precomposed 
vs. decomposed characters and issues related to ordering of multiple 
combining characters.

RESPONSE to your comment:

WebCGM agrees that this is the consistent and reliable way to perform 
such comparisons. Text to this effect will be added to the description 
of the 'cgmFont' value -- conversion to unicode normalization form 
should precede the comparison and follow the other WebCGM-specific 
normalization.

In 9.3.2, add a new sentence to the end of the description of 'cgmFont': 
"After this WebCGM-specific normalization, correct and consistent 
results when comparing metafile font names with the 'cgmFont' value  
for font names outside of WebCGM's restricted core set of thirteen 
specific fonts (see T.16.13 of @@section 6.5@@)  may require that 
WebCGM processors convert to a @@unicode normalization form@@ before 
performing the string comparison." Also add to WebCGM Chapter 1 the 
references for both the Unicode Standard Annex #15 [1] and the W3C 
Character Model, Part 2 (Normalization) [2].

[1] http://www.unicode.org/reports/tr15/
[2] http://www.w3.org/TR/charmod-norm/

Incorporating all proposed changes, the paragraph of 'cgmFont' 
description becomes:

"The name of the font in the metafile for which font substitution is 
requested. Before attempting to match a font used in the metafile to the 
value (string) of cgmFont, both font names are normalized by a 
WebCGM-specific normalization: convert to lower-case; and strip out all 
whitespace, UNDERSCORE, and HYPHEN characters. Note: This 
WebCGM-specific normalization is derived from and intended for the 
substantial volume of existing metafiles that aim to invoke fonts from 
WebCGM's restricted core set of thirteen specific fonts (see T.16.13 of 
@@section 6.5@@). Many such metafiles contain well-known and trivial 
deviations in the construction of those font names, and they most often 
are encoded in WebCGM's default character encoding of ISO 8859-1. This 
WebCGM-specific normalization may be less useful outside of this 
intended scope. After this WebCGM-specific normalization, correct and 
consistent results when comparing metafile font names to the 'cgmFont' 
value  for font names outside of WebCGM's restricted core set of 
thirteen specific fonts  may require that WebCGM processors convert to 
a @@unicode normalization form@@ before performing the comparison."

[Ed note: @@section 6.5@@ denotes text "section 6.5" that links to 
"WebCGM21-Profile.html#webcgm_4_5", which in the LCWD version is:
http://www.w3.org/TR/2008/WD-webcgm21-20080917/WebCGM21-Profile.html#webcgm_4_5;
@@unicode normalization form@@ denotes text "unicode normalization form" 
that links to:
http://www.w3.org/TR/charmod-norm/#sec-ChoiceNFC ]


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Received on Friday, 19 December 2008 16:05:58 GMT

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