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Re: ISSUE-358 (Sequence support): Add identifier support for related ordered sequences of documents [TTML2]

From: Glenn Adams <glenn@skynav.com>
Date: Wed, 10 Dec 2014 11:33:19 -0700
Message-ID: <CACQ=j+cxHGHowAVFNT8vmqh__=zk=pBTrmGofKs4QzksbJAkaw@mail.gmail.com>
To: Timed Text Working Group <public-tt@w3.org>
Now that I've introduced a generic metadata item element, it is better to
satisfy this requirement by simply defining new named metadata items,
representing it as:

<ttm:item name="sequenceIdentifier">*string*</ttm:item>

<ttm:item name="sequenceNumber">*positiveInteger*</ttm:item>

On Wed, Dec 10, 2014 at 9:56 AM, Timed Text Working Group Issue Tracker <
sysbot+tracker@w3.org> wrote:

> ISSUE-358 (Sequence support): Add identifier support for related ordered
> sequences of documents [TTML2]
>
> http://www.w3.org/AudioVideo/TT/tracker/issues/358
>
> Raised by: Nigel Megitt
> On product: TTML2
>
> In an authoring environment that creates an ordered sequence of TTML
> documents that collectively form some kind of coherent representation
> collectively, such as a sequence of documents created 'live', it is useful
> to be able to identify at the root level, i.e. with minimal parsing
> requirements, that:
>
> 1. A collection of documents belongs to the same sequence and
> 2. The relative ordering of a document within the sequence.
>
> This also relates to Change Proposal 25 and Issue-288, and the proposal
> made in the November TPAC meeting.
>
> Modified proposal now includes a sequence number:
>
> Metadata attribute ttm:sequenceIdentifier
> Considered significant on tt:tt only.
> Optional attribute.
> Type xs:string
> Description: The ttm:sequenceIdentifier metadata attribute can be used to
> distinguish between sequences of documents where the documents within a
> sequence are related to each other but there is not necessarily any
> relationship between different sequences.
>
> Metadata attribute ttm:sequenceNumber
> Considered significant on tt:tt only.
> Optional attribute.
> Type xs:positiveInteger
> Description: The ttm:sequenceNumber metadata attribute can be used to sort
> documents with the same sequenceIdentifier into a defined order. Two
> documents with the same sequenceIdentifier SHOULD NOT have the same
> sequenceNumber, if sequenceNumber is used.
>
>
>
> Note that this proposal mirrors work happening in EBU but is my proposal
> and not an EBU proposal, for the avoidance of doubt.
>
>
>
>
Received on Wednesday, 10 December 2014 18:34:07 UTC

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