RE: https://w3c.social/@w3cdevs/114896204993494333

We now invite implementations of "IMSC Text Profile 1.3"! This specification defines a text-only profile of TTML2 intended for subtitle and caption delivery applications worldwide #a11y #timetoimplement

▶️ https://www.w3.org/TR/ttml-imsc1.3/

Feedback also welcome: https://github.com/w3c/imsc/issues/