[a11y-request] Issue: IMSC Text Profile 1.3 (22 July 2025) (#116) marked as REVIEW REQUESTED

palemieux has just labeled an issue for https://github.com/w3c/a11y-request as "REVIEW REQUESTED":

== IMSC Text Profile 1.3 (22 July 2025) ==
- name of spec to be reviewed: IMSC Text Profile 1.3
- shortname: IMSC
- URL of spec: https://www.w3.org/TR/2025/WD-ttml-imsc1.3-20250722/
- Do you need a reply by a particular date?: 2025-09-16
- Please point to the results of your own self-review: n/a (see below)
- Where and how to file issues arising: https://github.com/w3c/imsc/issues
- Primary contacts:
  - @palemieux (editor)
  - @nigelmegitt (WG co-chair)
  - @gkatsev (WG co-chair)
  - @himorin (Team contact)
- WG driving the specification: TTWG

We are kindly seeking your review of the IMSC Text Profile 1.3 FPWD.

https://www.w3.org/TR/2025/WD-ttml-imsc1.3-20250722/

The IMSC REC has already undergone APA review in the past, and IMSC 1.3 Text Profile is minor revision. We therefore kindly request that the review be completed before 2025-09-16 (let us know if you do not think you will be able to meet the target data). [WCAG and MAUR considerations](https://www.w3.org/TR/ttml-imsc1.3/#wcag-maur-applications) are included in the REC.

The following summarizes the substantive changes made from [IMSC 1.2](https://www.w3.org/TR/ttml-imsc1.2). It is also available at: https://www.w3.org/TR/ttml-imsc1.3/#substantive-changes-summary.

# Japanese character set

A recommended supplementary character set for the Japanese language has been added based on feedback from ARIB, which is an organization of Japanese users.

https://github.com/w3c/imsc/issues/544

# Superscript/subscript text

Support for superscript/subscript text was added based on feedback from French users. This is merely permitting a feature that has been part of TTML2, of which IMSC is a profile, since its inception.

https://github.com/w3c/imsc/issues/583

# Image profile

The IMSC Image Profile, specified in earlier versions of this specification, is removed in this version, following a survey of IMSC users. The IMSC Image Profile specified image-only timed text.

https://github.com/w3c/imsc/issues/600

# Hypothetical Render Model

Following publication of the (IMSC Hypothetical Render Model)[https://www.w3.org/TR/imsc-hrm/] as a separate REC, the definition of the Hypothetical Render Model is removed from this document and replaced with a reference to the separate REC.

https://github.com/w3c/imsc/issues/582

See https://github.com/w3c/a11y-request/issues/116


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Received on Thursday, 24 July 2025 04:54:27 UTC