Specification

https://www.w3.org/TR/2025/CRD-dapt-20250801/

Explainer

https://github.com/w3c/dapt/wiki/DAPT-Explained

Links

• The WG's request for this TAG review: https://www.w3.org/2025/07/17-tt-minutes.html#efea
• TAG review of the previous version of this specification, if any: https://github.com/w3ctag/design-reviews/issues/897

• A description of what has changed since our previous review: https://www.w3.org/TR/dapt/substantive-changes-summary.txt (2nd part at From CRS (20250311))

• no web platform tests (not intended to be implemented by web browser), test suites are prepared in tests' repository

• Rename #scriptRepresents to #scriptRepresents-root for consistency (#296)

  • attribute name changed for consistency with other part of sepc

• Remove the #xmlId-div feature (#297)

  • removed xmlId-div attribute originally introduced to specify target of script, but no longer required after spec development

• Clarify usage of Represents and Script Represents (#262)

  • small refactor to define the inheritance on the daptm:represents attribute specifically

• Allow Represents to apply to Text (#295)

  • allow using daptm:represents attribute to text elements (like span), with remark of splitting/duplicating these elements to match with scripts to be represented

• Replace the #scriptEventGrouping extension feature with the TTML1 feature #nested-div (#303)

  • DAPT specific feature scriptEventGrouping is replaced with existing TTML feature

The specification

• Follows the Web Platform Design Principles.
• Includes Security and Privacy Considerations sections based on answers to the Security/Privacy Questionnaire.

Where and by whom is the work is being done?

• GitHub repo: https://github.com/w3c/dapt
• Primary contacts:
  • Nigel Megitt (@nigelmegitt, BBC), chair of TTWG and co-editor
  • Cyril Concolato (@cconcolato, Netflix), co-editor
• Organization/project driving the specification: TTWG, Netflix, BBC
• This work is being funded by: n/a
• Primary standards group developing this feature: Audio Description Community Group, Media Accessibility User Requirements, GitHub issues created by external parties (ITV, Yella Umbrella, ...), Wide Review results.
• Incubation and standards groups that have discussed the design: n/a

Feedback so far

• Active horizontal reviews: https://github.com/w3c/dapt/issues/281 https://github.com/w3c/dapt/issues/282
• Multi-stakeholder feedback: no browser involved
• Major unresolved issues with or opposition to this specification: https://github.com/w3c/dapt/issues?q=is%3Aissue%20state%3Aopen%20label%3A%22At%20risk%20feature%22
• Status/issue trackers for implementations: no browser involved

You should also know that...

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