- From: Glenn Adams <glenn@skynav.com>
- Date: Wed, 10 Dec 2014 11:33:19 -0700
- To: Timed Text Working Group <public-tt@w3.org>
- Message-ID: <CACQ=j+cxHGHowAVFNT8vmqh__=zk=pBTrmGofKs4QzksbJAkaw@mail.gmail.com>
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