[Bug 13184] Allow nested chapters by having nested (time range-wise) cues

http://www.w3.org/Bugs/Public/show_bug.cgi?id=13184

--- Comment #1 from Philip Jägenstedt <philipj@opera.com> 2011-07-08 12:28:45 UTC ---
http://lists.w3.org/Archives/Public/public-html/2011Jul/0150.html

While nested chapters are not overly common, we can easily support the use case
simply by considering cues which are contained (time range-wise, not
syntactically) within another to create a child chapter, as such:

WEBVTT

00:00:00.000 --> 00:00:10.700
Title Slide

00:00:10.700 --> 00:00:47.600
Introduction by Naomi Black

00:00:47.600 --> 00:07:37.900
Talk on WebVTT

00:00:47.600 --> 00:01:50.100
Impact of Captions on the Web

00:01:50.100 --> 00:03:33.000
Requirements of a Video text format

00:03:33.000 --> 00:04:57.766
Simple WebVTT file

00:04:57.766 --> 00:06:16.666
Styled WebVTT file

00:06:16.666 --> 00:07:37.900
Internationalized WebVTT file

The hierarchy here is:

1. Title Slide
2. Introduction by Naomi Black
3. Talk on WebVTT
3.1. Impact of Captions on the Web
3.2. Requirements of a Video text format
3.3. Simple WebVTT file
3.4. Styled WebVTT file
3.5. Internationalized WebVTT file

What's needed in the spec is to specify a simple algorithm for constructing the
tree and say that they may expose in UI and to AT this tree. One algorithm was
suggested in
<http://lists.w3.org/Archives/Public/public-html/2011Jul/0119.html>, but
anything will do.

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Received on Friday, 8 July 2011 12:28:47 UTC