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Re: Pruning of content elements based on the Intermediate Synchronic Document Construction

From: Andreas Tai <tai@irt.de>
Date: Mon, 08 Jun 2015 18:01:04 +0200
Message-ID: <5575BC40.3020508@irt.de>
To: Nigel Megitt <nigel.megitt@bbc.co.uk>, Glenn Adams <glenn@skynav.com>, public-tt <public-tt@w3.org>
Thanks Nigel for the detailed information about the status on this 
issue. I can add the issue discussed in this thread to issue 341.

Best regards,

Andreas

Am 08.06.2015 um 12:46 schrieb Nigel Megitt:
> Hi Andreas,
>
> Thanks for summarising. Comments inline:
>
> On 05/06/2015 18:56, "Andreas Tai" <tai@irt.de> wrote:
>
>> Thanks for discussing this issue in the latest TTWG Telco on the
>> 04/06/2015. Let me summarize what I read out of it (to not keep this
>> email hanging and have the latest state in the email archive).
>>
>> 1) The normative algorithm in TTML 1 does what is described below.
> Probably - we didn't formally confirm this.
>
>> 2) This may be an error in the specification but for sure it is not the
>> parsing behaviour intended by the TTWG.
> Correct.
>
>> 3) An issue on this has already opened by Glenn last year [1].
> Issue-341 [1] is about something closely related, but different.
> Nevertheless the same solution should address both points. It would be
> worth adding a note to the issue to make sure it includes those
> requirements.
>
> I.e. Issue-341 is about what region a div belongs in if it has no region
> specified but has descendants that specify more than one region. This new
> point is about what goes in the ISD if a region and at least one of its
> descendants each specify a region, and they are different regions.
>
> Do you want to go ahead and add this to the issue?
>
>
>> 4) The solution is not decided yet. Glenn works out an alternative
>> wording for the algorithm. It is an option to publish this in a 3rd
>> edition of TTML 1.
> Yes, Glenn has offered to propose an alternative algorithm. We have not
> yet assessed if we can apply that retrospectively to TTML1 or if we will
> only add it to TTML2.
>
> There's also the option to add a note to TTML1 explaining the perhaps
> unexpected consequences of the current algorithm.
>
> Kind regards,
>
> Nigel
>
>> Please correct me if I misunderstood anything.
>>
>> Best regards,
>>
>> Andreas
>>
>> [1] http://www.w3.org/AudioVideo/TT/tracker/issues/341
>>
>> Am 01.06.2015 um 20:16 schrieb Andreas Tai:
>>> Glenn, all,
>>>
>>> one question regarding the construction of an Intermediate Synchronic
>>> Document (ISD) based on the algorithm defined in section 9.3.2 of TTML.
>>>
>>> Given the following simplified TTML document:
>>>
>>> <tt>
>>>      <head>
>>>          <layout>
>>>              <region id="divRegion" ...../>
>>>              <region id="paragraphRegion" ...../>
>>>          </layout>
>>>      </head>
>>>      <body>
>>>          <div region="divRegion">
>>>              <p region="paragraphRegion" begin="00:00:00.000"
>>> end="00:00:02.000" >Hello world!</p>
>>>          </div>
>>>      </body>
>>> </tt>
>>>
>>>
>>> Would the corresponding ISD for the interval [0s, 2s) look like this?
>>>
>>> <tt>
>>>      <head>
>>>          <layout>
>>>              <region id="divRegion" ...../>
>>>              <region id="paragraphRegion" ...../>
>>>          </layout>
>>>      </head>
>>> </tt>
>>>
>>>  From my reading no body subtrees will be re-parented to the regions
>>> "divRegion" and "paragraphRegion" because they are empty following
>>> the  [construct intermediate document] and [associate region]
>>> algorithms.
>>>
>>> Best regards,
>>>
>>> Andreas
>>>
>>
>> -- 
>> ------------------------------------------------
>> Andreas Tai
>> Production Systems Television IRT - Institut fuer Rundfunktechnik GmbH
>> R&D Institute of ARD, ZDF, DRadio, ORF and SRG/SSR
>> Floriansmuehlstrasse 60, D-80939 Munich, Germany
>>
>> Phone: +49 89 32399-389 | Fax: +49 89 32399-200
>> http:www.irt.de  | Email:tai@irt.de
>> ------------------------------------------------
>>
>> registration court&  managing director:
>> Munich Commercial, RegNo. B 5191
>> Dr. Klaus Illgner-Fehns
>> ------------------------------------------------
>>
>>
>>


-- 
------------------------------------------------
Andreas Tai
Production Systems Television IRT - Institut fuer Rundfunktechnik GmbH
R&D Institute of ARD, ZDF, DRadio, ORF and SRG/SSR
Floriansmuehlstrasse 60, D-80939 Munich, Germany

Phone: +49 89 32399-389 | Fax: +49 89 32399-200
http: www.irt.de | Email: tai@irt.de
------------------------------------------------

registration court&  managing director:
Munich Commercial, RegNo. B 5191
Dr. Klaus Illgner-Fehns
------------------------------------------------
Received on Monday, 8 June 2015 16:08:06 UTC

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