W3C IMSC 1.2 (TTML profiles for subtitles/captions)
Source: https://www.w3.org/TR/ttml-imsc1.2
Structured fields
{
"checked_at": "2026-10-17T00:00:00.000Z",
"usefulness": "W3C Recommendation defining Text and Image profiles of TTML2 for subtitle and caption delivery; the interchange target behind many streaming subtitle deliverables.",
"source_type": "documentation",
"availability": "available",
"source_owner": "W3C Timed Text Working Group",
"next_check_at": "2026-10-24T00:00:00.000Z"
}Evidence claims
- [sourced_fact] W3C Recommendation published 4 August 2020 by the Timed Text Working Group; defines Text Profile (Unicode text) and Image Profile (bitmaps) of TTML2; extends IMSC 1.1. source
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | unknown | unknown | unknown | unknown | Page states W3C liability, trademark and document-use rules apply (W3C Software and Document License); license terms not read in detail. |
Linked records
- Can subtitle QC against streamer style guides be fully automated? discusses → this