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

From: Timed Text Working Group Issue Tracker <sysbot+tracker@w3.org>
Date: Wed, 10 Dec 2014 16:56:21 +0000
Message-Id: <E1XykYn-0007rX-AV@shauna.w3.org>
To: public-tt@w3.org
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 16:56:22 UTC

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