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[Bug 13359] A way is needed to identify the type of data in a track element

From: <bugzilla@jessica.w3.org>
Date: Mon, 28 Nov 2011 17:23:43 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1RV4vf-0002dl-0K@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=13359

--- Comment #25 from Bob Lund <b.lund@cablelabs.com> 2011-11-28 17:23:39 UTC ---
(In reply to comment #24)
> > In the case of out-of-band tracks, multiple metadata text tracks would likely
> > be used.
> 
> Why?

Authoring of the metadata text tracks will be done independently for each
application,.e.g. the <track> with content insertion triggers may be sourced by
the business entity that sells insertion opportunities, the <track> with
interactive content triggers may be sourced by the content provider that wants
to add interactivity to the content.

Since these will come in as independent files it seems most efficient to be
able to deliver them that way, as opposed to requiring a processing step to
merge them into a single <track>.

This would be consistent with other text tracks, e.g. captions and subtitles,
that are separate in <track>.

Bob

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