{minutes} TTWG Meeting 5/6/2014

Available at: http://www.w3.org/2014/06/05-tt-minutes.html


   [1]W3C

      [1] http://www.w3.org/

                               - DRAFT -

                Timed Text Working Group Teleconference

05 Jun 2014

   See also: [2]IRC log

      [2] http://www.w3.org/2014/06/05-tt-irc

Attendees

   Present
          Frans-EBU, Plh, dsinger, glenn, jdsmith, nigel, pal,
          plh, tmichel

   Regrets
          mdolan

   Chair
          nigel

   Scribe
          nigel

Contents

     * [3]Topics
         1. [4]TPAC F2F
         2. [5]Actions pending review
         3. [6]Change Proposal 12, Profiles and Features
         4. [7]Pending Review Issues
         5. [8]AOB
     * [9]Summary of Action Items
     __________________________________________________________

   <trackbot> Date: 05 June 2014

   <scribe> scribeNick: nigel

TPAC F2F

   nigel: Philippe told us this week that we can't meet on Monday
   and Friday as requested but could do Monday and Thursday

   tmichel: It's due to lack of meeting room space.

   RESOLUTION: We will meet at TPAC on the Monday and Thursday

Actions pending review

   action-232?

   <trackbot> action-232 -- Glenn Adams to Consider also defining
   @validation on ttp:profile, in addition to (override) tt:tt --
   due 2014-04-01 -- PENDINGREVIEW

   <trackbot>
   [10]http://www.w3.org/AudioVideo/TT/tracker/actions/232

     [10] http://www.w3.org/AudioVideo/TT/tracker/actions/232

   glenn: I added a validation and validationAction attribute.

   nigel: We had discussion about the default value being warn
   instead of abort

   glenn: I still prefer it to be abort.

   nigel: I have in mind the case that the user wishes to present
   a document of unknown provenance but the default
   validationAction causes an abort

   close action-232

   <trackbot> Closed action-232.

   <glenn> action glenn to define default for @validationAction to
   be warn if @validation is optional; otherwise, default is abort

   <trackbot> Created ACTION-296 - Define default for
   @validationACTION to be warn if @validation is optional;
   otherwise, default is abort [on Glenn Adams - due 2014-06-12].

   action-254?

   <trackbot> action-254 -- Glenn Adams to Add errata note for
   ttml1 pointing at constraint in smil prohibiting dur of zero,
   add normative text to ttml2 -- due 2014-04-01 -- PENDINGREVIEW

   <trackbot>
   [11]http://www.w3.org/AudioVideo/TT/tracker/actions/254

     [11] http://www.w3.org/AudioVideo/TT/tracker/actions/254

   glenn: There's still an action to avoid using 'wilful
   violation' wording

   close action-254?

   <trackbot> Closed action-254.

   <glenn> ACTION glenn to soften language about 'willful
   violation' regarding treatment of duration zero

   <trackbot> Created ACTION-297 - Soften language about 'willful
   violation' regarding treatment of duration zero [on Glenn Adams
   - due 2014-06-12].

   action-284?

   <trackbot> action-284 -- Glenn Adams to Create the registry
   page -- due 2014-05-01 -- PENDINGREVIEW

   <trackbot>
   [12]http://www.w3.org/AudioVideo/TT/tracker/actions/284

     [12] http://www.w3.org/AudioVideo/TT/tracker/actions/284

   close action-284?

   <trackbot> Closed action-284.

   action-291?

   <trackbot> action-291 -- Nigel Megitt to Find the related issue
   that describes the need to restrict or extend individual
   profile features -- due 2014-05-29 -- PENDINGREVIEW

   <trackbot>
   [13]http://www.w3.org/AudioVideo/TT/tracker/actions/291

     [13] http://www.w3.org/AudioVideo/TT/tracker/actions/291

   close action-291

   <trackbot> Closed action-291.

Change Proposal 12, Profiles and Features

   [14]https://www.w3.org/wiki/TTML/changeProposal012

     [14] https://www.w3.org/wiki/TTML/changeProposal012

   <glenn>
   [15]https://dvcs.w3.org/hg/ttml/raw-file/default/ttml2/design/T
   PAC2013-TTMLProfiles.pdf

     [15] https://dvcs.w3.org/hg/ttml/raw-file/default/ttml2/design/TPAC2013-TTMLProfiles.pdf

   glenn: describes changes made for issues in change proposal 12
   by reference to page 8 of the pdf presentation

   dsinger: I think combination content profiles inferred within a
   document is a mistake and we should only have the OR expression
   not the AND, i.e. those wishing to use an alternate profile
   should define it separately.

   glenn: There are multiple uses of this, either externally in
   defining a profile and within a specific document for 'on the
   fly' processing.

   dsinger: It's the second of those, the 'on the fly' that I
   think is a mistake.

   glenn: We should think about that some more and think about if
   we want to make it asymmetrical, with respect to content
   profile combinations as opposed to processor profile
   combinations.

   nigel: I believe the combination of profiles is described in
   issue-206.

   glenn: I think david's raising a new issue

   <Dsinger_> Issue-206

   <trackbot> Issue-206 -- Add ttp:profileCombination parameter --
   pending review

   <trackbot>
   [16]http://www.w3.org/AudioVideo/TT/tracker/issues/206

     [16] http://www.w3.org/AudioVideo/TT/tracker/issues/206

   glenn: It's that the complexity of supporting on the fly
   combination of content profiles is too complex and not needed.
   ... I've added two editors notes, the second it in 5.2.4.2 that
   describes the content profile combination semantics
   ... If a receiving processor is able to do validation and it's
   required then it would use the content profiles otherwise
   there's no other use for content profiles. If we define
   validation processing well even in the context of content
   profiles then that leaves the judgement of complexity to the
   reader.
   ... I would like to propose that we discuss profiles further at
   the upcoming F2F in September, and that I write some
   explanatory documentation, both in the spec and for the
   meeting.

   close issue-206

   <trackbot> Closed issue-206.

   issue-261?

   <trackbot> issue-261 -- signaling document profile conformance
   is separate from decoder presentation requirements -- pending
   review

   <trackbot>
   [17]http://www.w3.org/AudioVideo/TT/tracker/issues/261

     [17] http://www.w3.org/AudioVideo/TT/tracker/issues/261

   close issue-261

   <trackbot> Closed issue-261.

   issue-266?

   <trackbot> issue-266 -- add ability for instance documents to
   declare what profile(s) it conforms to -- pending review

   <trackbot>
   [18]http://www.w3.org/AudioVideo/TT/tracker/issues/266

     [18] http://www.w3.org/AudioVideo/TT/tracker/issues/266

   close issue-266

   <trackbot> Closed issue-266.

   issue-280?

   <trackbot> issue-280 -- Add ability to define a profile from
   multiple profiles. -- pending review

   <trackbot>
   [19]http://www.w3.org/AudioVideo/TT/tracker/issues/280

     [19] http://www.w3.org/AudioVideo/TT/tracker/issues/280

   close issue-280

   <trackbot> Closed issue-280.

   issue-263?

   <trackbot> issue-263 -- profile feature set may not match
   intended feature constraints -- pending review

   <trackbot>
   [20]http://www.w3.org/AudioVideo/TT/tracker/issues/263

     [20] http://www.w3.org/AudioVideo/TT/tracker/issues/263

   glenn: ttp:feature can now be specified with either an extends
   or a restricts (or both, currently) attribute.

   <glenn> action glenn to either proscribe or define semantics on
   specifying both @extends and @restricts on a
   ttp:{feature,ext3ension}

   <trackbot> Created ACTION-298 - Either proscribe or define
   semantics on specifying both @extends and @restricts on a
   ttp:{feature,ext3ension} [on Glenn Adams - due 2014-06-12].

   <glenn> dsinger: mea culpa

   nigel: an example for this may be extending or restricting
   permitted values e.g. for the tts:color attribute.

   glenn: ttp:permitFeatureNarrowing and ttp:permitFeatureWidening
   are attributes that describe whether or not processors that
   implement narrower/wider versions to claim support.
   ... It's not predictable what the author wants so I added the
   attributes to cover those cases specifically.

   nigel: Can we leave that open until there are some examples
   e.g. SDP-US color space.

   issue-299?

   <trackbot> issue-299 -- dur must be greater than zero --
   pending review

   <trackbot>
   [21]http://www.w3.org/AudioVideo/TT/tracker/issues/299

     [21] http://www.w3.org/AudioVideo/TT/tracker/issues/299

   close issue-299

   <trackbot> Closed issue-299.

Pending Review Issues

   issue-318?

   <trackbot> issue-318 -- Hypothetical Render Model glyph copy
   assumes no sub-pixel positioning -- pending review

   <trackbot>
   [22]http://www.w3.org/AudioVideo/TT/tracker/issues/318

     [22] http://www.w3.org/AudioVideo/TT/tracker/issues/318

   close issue-318

   <trackbot> Closed issue-318.

   issue-320?

   <trackbot> issue-320 -- Is normative SMPTE 2052 reference okay?
   -- pending review

   <trackbot>
   [23]http://www.w3.org/AudioVideo/TT/tracker/issues/320

     [23] http://www.w3.org/AudioVideo/TT/tracker/issues/320

   close issue-320

   <trackbot> Closed issue-320.

AOB

   nigel: I will send regrets for 26th June and 3rd July

Summary of Action Items

   [End of minutes]
     __________________________________________________________


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Received on Thursday, 5 June 2014 15:10:13 UTC