{agenda} TTWG Meeting 2017-03-09

This meeting is scheduled for up to 60m. Please be ready for a prompt start at 10:03am Boston time.

As agreed last week, during March we will begin at the "old" time of 10am Boston

Our teleconference is scheduled with reference to Boston Time, the correct time of this teleconference in your locale may change.

Check https://www.timeanddate.com/worldclock/fixedtime.html?iso=20170309T10&p1=43

Thursdays 10:03am-12:00pm Boston local

Joining details:

see https://lists.w3.org/Archives/Member/member-tt/2016Oct/0009.html
(members-only link – if you can't see this and wish to join please contact me)

Agenda+ Assign Roles

Chairs: Nigel Megitt

Scribe: usually Nigel – open to offers!

Regrets: none

Activity since last meeting:
See individual agenda items for recent activity on specific products

Cross-product TTWG board: http://www.w3.org/AudioVideo/TT/board/
We are still using tracker for actions unrelated to issues.
Please do not add or modify issues in tracker!

IMSC: https://github.com/w3c/imsc/pulse
TTML1: https://github.com/w3c/ttml1/pulse
TTML2: https://github.com/w3c/ttml2/pulse
TTML Profile Registry: https://github.com/w3c/tt-profile-registry/pulse
TTML-WebVTT mapping: https://github.com/w3c/ttml-webvtt-mapping/pulse
WebVTT: https://github.com/w3c/webvtt/pulse

Agenda+ Prioritise discussion for this meeting and look ahead

Check-point for order of topics – I'd suggest, subject to reordering:
1. IMSC (now incorporates Unicode ticket)
2. TTML issues, actions, PRs etc
3. Progress on HTMLCue proposal (placeholder)
4. WebVTT comments (placeholder)
5. AOB – please notify of any other AOB now!


Reminder re future milestones and meetings:

March Meetings:

Thursday 16th March: TTWG phone meeting 2 hours
Thursday 23rd March: TTWG phone meeting 2 hours
Thursday 30th March: TTWG phone meeting 2 hours

Further ahead:

Thursday 6th April: TTWG phone meeting ? Hours (Nigel away)
Thursday 13th April: TTWG phone meeting ? Hours
Thursday 20th April: TTWG phone meeting ? Hours
Thursday 27th April: TTWG phone meeting ? Hours

IMSC 2 and TTML2 publication events: see the timeline of upcoming work at https://www.w3.org/wiki/TimedText/Publications#Timeline_of_TTML2_and_IMSC2_work


Agenda+ IMSC (now incorporates Unicode ticket)

Main agenda point is to try to conclude on the foreign namespace usage is underspecified<https://github.com/w3c/imsc/issues/213> issue (i.e. Merge the pull request) and move to a WD for Wide Review + Horizontal Review.

IMSC 1.0.1 FPWD published at https://www.w3.org/TR/ttml-imsc1.0.1/
IMSC 1 Rec available at https://www.w3.org/TR/2016/REC-ttml-imsc1-20160421/
Patent policy call for exclusions sent 2017-02-03, archived at https://lists.w3.org/Archives/Public/public-tt/2017Feb/0006.html

Editor's draft is directly viewable at http://w3c.github.io/imsc/imsc1/spec/ttml-ww-profiles.html
IMSC Implementation Page: https://www.w3.org/wiki/TimedText/IMSC1_implementation_page.

Unicode CLDR discussion
Unicode ticket is at http://unicode.org/cldr/trac/ticket/8915
Pierre's response to the recent update is at http://unicode.org/cldr/trac/ticket/8915#comment:9
Email response from Shervin at Unicode https://lists.w3.org/Archives/Public/public-tt/2016Dec/0018.html

Merged pull requests: none
Open pull requests: Editorial clarification of foreign namespace provisions<https://github.com/w3c/imsc/pull/216>
New or discussed issues: foreign namespace usage is underspecified<https://github.com/w3c/imsc/issues/213>
Closed issues: none


Agenda+ TTML1 & TTML2 issues, actions, PRs, editorial actions etc

Horizontal Review:

CSS Review of TTML2, threads: FW: TTML2 horizontal review with CSS<https://lists.w3.org/Archives/Public/public-tt/2016Dec/0013.html> and Fwd: Subtitle/caption styling + TTML + CSS<https://lists.w3.org/Archives/Public/public-tt/2016Dec/0019.html>

Internationalisation review by Addison Phillips and r12a has generated several new issues on TTML2 and comments on existing issues (see below)

CSS 2.2 request for reviews from TTWG et al: Pre-announcement of CR for CSS 2.2 & request for reviews<https://lists.w3.org/Archives/Public/public-tt/2016Dec/0017.html> When can we schedule a review and gather feedback?

Actions:
ID      State   Title   Person  Due Date        Associated with
ACTION-443<https://www.w3.org/AudioVideo/TT/tracker/actions/443>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/443/edit>     open    Prepare a document showing mapping arib ruby extension features to ttml2 for use as a liaison document to arib.<https://www.w3.org/AudioVideo/TT/tracker/actions/443>   Glenn Adams     2016-08-26      TTML2<https://www.w3.org/AudioVideo/TT/tracker/products/4>
ACTION-462<https://www.w3.org/AudioVideo/TT/tracker/actions/462>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/462/edit>     open    Create issue on ttml2 to add "mapping from other versions and profiles of ttml"<https://www.w3.org/AudioVideo/TT/tracker/actions/462>   Glenn Adams     2016-04-28      TTML2<https://www.w3.org/AudioVideo/TT/tracker/products/4>

Most recent WD published at https://www.w3.org/TR/2017/WD-ttml2-20170106/

Merged Pull Requests:
Improve language regarding pruning during ISD construction (#210, #212).<https://github.com/w3c/ttml2/pull/272>
Open TTML1 Pull Requests:
Clarify application of padding (#221)<https://github.com/w3c/ttml1/pull/233>
Open TTML2 Pull Requests:
Issue 0203 add examples of ja features part 2<https://github.com/w3c/ttml2/pull/273>
New TTML1 Issues: none
New TTML2 Issues:
Show better mappings between base and annotation in figures<https://github.com/w3c/ttml2/issues/275>
Add an illustration of pinyin for ruby align<https://github.com/w3c/ttml2/issues/274>
Closed TTML1 Issues: none
Closed TTML2 Issues:
Please provide more illustrations and examples for the ruby sections<https://github.com/w3c/ttml2/issues/256>
Discussed TTML1 Issues: none
Discussed TTML2 Issues:
Add support for Audio Description requirements<https://github.com/w3c/ttml2/issues/195>
Use of 'em' units in tts:fontSize on region element is not well defined.<https://github.com/w3c/ttml2/issues/216>
<emphasis-position> vs CSS text-emphasis-position + Mongolian<https://github.com/w3c/ttml2/issues/240>
rubyAlign withBase<https://github.com/w3c/ttml2/issues/248>
Support for bopomofo ruby needed<https://github.com/w3c/ttml2/issues/253>
Add support for compositing a TTML2 document onto HDR video<https://github.com/w3c/ttml2/issues/233>
Add examples of new features commonly used with Japanese content (2 of 2)<https://github.com/w3c/ttml2/issues/203>
Ambiguous definition of "empty" in Synchronic Document Construction<https://github.com/w3c/ttml2/issues/212>
Mismatch between CSS and TTML2 text align styling on <span><https://github.com/w3c/ttml2/issues/238>
Default ruby position may be on the wrong side for tblr (eg. Mongolian)<https://github.com/w3c/ttml2/issues/254>
tts:writingMode example is not helpful<https://github.com/w3c/ttml2/issues/269>

Focus topic(s) for this week

Use of 'em' units in tts:fontSize on region element is not well defined.<https://github.com/w3c/ttml2/issues/216> since this has been closed and reopened and we need to get to consensus so that we can close it and move on.

Issue-239 3D and images<https://github.com/w3c/ttml2/issues/239>
Can we resolve this on the call?

Inclusion of foreign namespace elements – is it only permitted on metadata elements, or anywhere? Do we need additional conformance language? See also IMSC issue foreign namespace usage is underspecified<https://github.com/w3c/imsc/issues/213>

TTML1 Clarification of padding pull request Clarify application of padding (#221)<https://github.com/w3c/ttml1/pull/233>


Current open issues: https://github.com/w3c/ttml1/issues and https://github.com/w3c/ttml2/issues
See spreadsheet of editorial actions at https://github.com/w3c/ttml2/blob/master/spec/ednotes.xlsx
Edit/build instructions now in README in ttml2/spec/ at https://github.com/w3c/ttml2/blob/master/spec/README.md


Agenda+ HTMLCue proposal progress update.

ID      State   Title   Person  Due Date        Associated with
ACTION-441<https://www.w3.org/AudioVideo/TT/tracker/actions/441>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/441/edit>     open    Kick off the analysis work on the vttcue carrying html idea.<https://www.w3.org/AudioVideo/TT/tracker/actions/441>      Andreas Tai     2015-11-05


See https://lists.w3.org/Archives/Public/public-tt/2016Apr/0012.html for further information on this, this week.

Also HTML import and HTMLCue?<https://lists.w3.org/Archives/Public/public-tt/2016Sep/0003.html> email from 2016-09-06.

[placeholder agenda item]

Agenda+ WebVTT review feedback

ID      State   Title   Person  Due Date        Associated with
ACTION-396<https://www.w3.org/AudioVideo/TT/tracker/actions/396>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/396/edit>     open    Produce evidence of request for wide review for webvtt, for the archive<https://www.w3.org/AudioVideo/TT/tracker/actions/396>   David Singer    2015-04-17      WebVTT 1.0<https://www.w3.org/AudioVideo/TT/tracker/products/8>

Discussion on WebVTT review feedback and next steps.

WebVTT Wide review wiki page: https://www.w3.org/wiki/WebVTT_Wide_Review

Open Pull requests:
Drop line: and position: settings with invalid linealign/colalign<https://github.com/w3c/webvtt/pull/337>
Use HTML's rules for parsing floating-point number values<https://github.com/w3c/webvtt/pull/339>
Add Security and Privay section<https://github.com/w3c/webvtt/pull/340>
Merged Pull requests: none
New issues:
"Interpret linepos as a (potentially signed) rea…"<https://github.com/w3c/webvtt/issues/338>
Parsing: should drop line:100,invalid setting<https://github.com/w3c/webvtt/issues/336>
Closed issues: none
Recently discussed issues:
CR bug: region identifiers<https://github.com/w3c/webvtt/issues/314>

Agenda+ AOB

Nigel: report from CSUN

References

Wiki http://www.w3.org/wiki/TimedText