TTML 1.0 (Editorial)
TTML 1.0 Test Suite
TTML IMSC 1.0
TTML IMSC 2.0
TTML Simple Delivery Profile for Closed Captions (US)
Frans de Jong
Loretta Guarino Reid
Philippe Le Hégaret
[The following is extracted from the liaison received from SMPTE at https://lists.w3.org/Archives/Member/w3c-archive/2012Sep/0214.html]
See Sections 6.1.4 and 6.1.5 at ST 428-7, and Section 8.2.13 at TTML.
It shall be possible to apply the tts:opacity style parameter to an individual <p> element. The parameter shall be animatable.
In order to avoid markup duplication when tts:opacity is used to create fade-up and -down effects, it shall be possible to either (a) define a given sequence of <set tts:opacity="…"> elements once and apply it to multiple <p> elements, or (b) allow that linear interpolation be applied between <set> values.
Add notes (no markup allowed, URIs get automatically hyperlinked):
It is not clear from this proposal whether this is intended to operate like the proposed addition of extent/origin on <p/>, i.e., applying opacity to the generated anonymous region, or whether this is intended to apply to individual <p/>s selected into a region irrespective of the opacity assigned to the region. If the latter is the case, then I would expect opacity to also apply to body, div, and spans.
Add support for continuous animation using animate element, which handles fade in/out. https://dvcs.w3.org/hg/ttml/rev/1d13586de640
Need to also change opacity to apply to content elements, so leaving open.
Add application of opacity to content elements. https://dvcs.w3.org/hg/ttml/rev/d6f70775685b