- From: Timed Text Working Group Issue Tracker <sysbot+tracker@w3.org>
- Date: Wed, 27 Aug 2014 20:31:31 +0000
- To: public-tt@w3.org
ISSUE-340 (profile designator clarification): Make clear that the use of the ttp:profile attribute is not required. [TTML IMSC 1.0] http://www.w3.org/AudioVideo/TT/tracker/issues/340 Raised by: Frans de Jong On product: TTML IMSC 1.0 ---------------------------- Request ---------------------------- Section: 5.1 (Text Profile Constraints -> Profile Designator) Further details should be added to this section to clarify that the association of a documents with a the IMSC profile designator does not require the presence of the designator in the XML document. Possibly some examples how to associate the designator to a document could be given (e.g. through the use of an metadata element not in TTML namespace). It should be made clear that the use of the ttp:profile attribute is not required. --------------------------------------- Background ------------------------------------- IMSC says: A subtitle document conforming to the Text Profile SHALL be associated with the following profile designator: (https://dvcs.w3.org/hg/ttml/raw-file/tip/ttml-ww-profiles/ttml-ww-profiles.html#text-profile-designator) EBU-TT-D does not allow to use the TTML profile element or the profile attribute. The reason why EBU-TT did not include the profile mechanism was that some of the strategies defined by profile mechanisms did not correlate with the EBU-TT requirements, e.g. according to the profile mechanism a processor is required to reject a document if a required feature of an "associated" profile is not supported (regardless if this feature is used in the document or not).
Received on Wednesday, 27 August 2014 20:31:32 UTC