ISSUE-425: Normalization and string identity issues

Normalization and string identity issues

State:

CLOSED

Product:

webvtt1

Raised by:

Addison Phillips

Opened on:

2015-02-26

Description:

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


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

Related Actions Items:

No related actions

Related emails:

1. [Bug 28259] [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from bugzilla@jessica.w3.org on 2015-11-25)
2. [Bug 28259] [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from bugzilla@jessica.w3.org on 2015-11-23)
3. [Bug 28259] [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from bugzilla@jessica.w3.org on 2015-10-01)
4. [Bug 28259] [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from bugzilla@jessica.w3.org on 2015-06-08)
5. [Bug 28259] [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from bugzilla@jessica.w3.org on 2015-06-01)
6. [Bug 28259] [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from bugzilla@jessica.w3.org on 2015-04-21)
7. [Bug 28259] [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from bugzilla@jessica.w3.org on 2015-03-24)
8. Re: [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from silviapfeiffer1@gmail.com on 2015-03-22)
9. [webvtt] Normalization and string identity issues [I18N-ISSUE-425] (from addison@lab126.com on 2015-03-20)
10. [minutes] Internationalization WG telecon 2015-03-19 (from ishida@w3.org on 2015-03-19)
11. I18N-ISSUE-425: Normalization and string identity issues ⓟ [WebVTT] (from sysbot+tracker@w3.org on 2015-02-26)

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