[Bug 28259] New: [webvtt] Normalization and string identity issues [I18N-ISSUE-425]

https://www.w3.org/Bugs/Public/show_bug.cgi?id=28259

            Bug ID: 28259
           Summary: [webvtt] Normalization and string identity issues
                    [I18N-ISSUE-425]
           Product: TextTracks CG
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: WebVTT
          Assignee: dave.null@w3.org
          Reporter: silviapfeiffer1@gmail.com
        QA Contact: public-texttracks@w3.org
                CC: philipj@opera.com, silviapfeiffer1@gmail.com

Feedback by Addison Phillips from W3C I18N group:
http://lists.w3.org/Archives/Public/public-tt/2015Mar/0058.html

I18N comment: https://www.w3.org/International/track/issues/425

http://www.w3.org/TR/webvtt1/#webvtt-file-structure

Various constructs such as 'cue identifier' are described as being:

--
...any sequence of one or more characters not containing the substring "-->"...
--

The document makes understood that this is a sequence of Unicode characters.
However, it leaves open the question of whether different Unicode character
sequences that represent the same semantic string identifier (see: Charmod [1]
and Charmod-Norm [2]) are considered "the same" or not. As currently written,
different UTF-8 byte sequences are considered distinct.

We would suggest that identifiers that use distinct code point sequences are
considered distinct (that is, that you are what we call a "non-normalizing
Specification"), which suggests that you include at least a health warning
about the dangers of using different character sequences.

[1] http://www.w3.org/TR/charmod/
[2] http://www.w3.org/TR/charmod-norm/
Particularly: http://www.w3.org/TR/charmod-norm/#formal-language and
http://www.w3.org/TR/charmod-norm/#non-normalizing

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Received on Sunday, 22 March 2015 00:07:35 UTC