TTWG Meeting 2026-06-18

[nigelmegitt]

Agenda

1. This meeting
2. DAPT
2.1 Test suite and implementation report
2.2 Issues and pull requests for discussion
2.2.1 Profile identifier and TTML registry w3c/dapt#248
3. TTML Media Type and Profile Registry
4. WebVTT
4.1 w3c/webvtt#548 Add WebVTT header metadata to disambiguate metadata cues (w3c/webvtt#511)
4.2 w3c/webvtt#545 Add properties of Fill and Stroke spec plus paint-order to properties that apply to ::cue and ::cue()
5. TPAC Planning
6. Impact of AI technologies on Timed Text Working Group's mission
AOB – please notify of any other AOB now!
7. Meeting close

Time and Joining Details: 15:00 - 16:00 (1 hours) UTC

Please be ready for a prompt start at 15:03am UTC time.

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

Check https://www.timeanddate.com/worldclock/fixedtime.html?iso=20260618T15&p1=1440

See W3C Calendar link for joining details: https://www.w3.org/events/meetings/74c31b0a-54dc-4869-bc18-4d398335c084/20260618T150000/

(if you can't see the joining details and wish to join please contact the Chair, @nigelmegitt or @gkatsev)

Future meetings and recent activity:

See the TTWG project board for upcoming meetings.

See individual agenda items for recent activity on specific products.

See the TTWG home page for links to repositories and recent activity.

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Agenda+ This meeting

Assign Roles

Chair: Nigel, Gary

Regrets:

Scribe:

Previous meeting: https://www.w3.org/2026/06/04-tt-minutes.html

Prioritise discussion for this meeting and look ahead

Check-point for order of topics and any other business.

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DAPT

Latest publication: CRS (currently 2026-02-10) published at https://www.w3.org/TR/DAPT/

See https://github.com/w3c/dapt/discussions where the discussions live.

Test suite and implementation report

Test repo: https://github.com/w3c/dapt-tests
Implementation Report https://www.w3.org/wiki/TimedText/DAPT_Implementation_Report

There are 0 open issues and 0 open pull requests on the test suite.

Issues and pull requests for discussion

• Address open issues, merge pull requests etc

Since the last meeting:

• issues opened or open and updated: 0
• issues closed: 0
• pull requests closed: 0

1 pull requests open (see Profile identifier below):

• Make the content and processor profile designators the same dapt#337 Make the content and processor profile designators the same

Other issues and pull requests flagged for agenda are at https://github.com/w3c/dapt/labels/agenda - currently 1 item flagged.

Profile identifier and TTML registry w3c/dapt#248 and w3c/dapt#337

Pros and cons of having separate profile identifiers for content and processors.

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TTML Media Type Definition and Profile Registry

Auto-publish status

@himorin to update please

Open issues and pull requests

Updates proposed as pull requests, including draft PR for DAPT.

• issues opened or open and updated: 0
• pull requests opened: 0

Issues and pull requests flagged for agenda are at https://github.com/w3c/tt-profile-registry/issues?q=state%3Aopen%20label%3Aagenda - currently 1 item flagged

2 pull requests are open and need review.

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WebVTT

w3c/webvtt#548 Add WebVTT header metadata to disambiguate metadata cues (w3c/webvtt#511)

This needs review

w3c/webvtt#545 Add properties of Fill and Stroke spec plus paint-order to properties that apply to ::cue and ::cue()

Are there additional CSS properties that we should permit? How should we decide?

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TPAC Planning

w3c/tpac2026-meetings#21 raised for TTWG meeting requests

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Impact of AI technologies on Timed Text Working Group's mission

Team has requested input on w3c/webai-roadmap#37

Raised at MEIG - see https://www.w3.org/2026/06/02-me-minutes.html#815b and w3c/media-and-entertainment#122

Next step is to put together a proposal for an MEIG task force - input welcome!

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Agenda+ Meeting close

Next meeting is 2026-07-02