Re: [w3ctag/spec-reviews] Timed Text Markup Language 2 (TTML2) (#138)

Given that this is a large spec, is there a description somewhere (e.g., in an explainer document) of what the major changes are relative to TTML1, and what use cases led to those changes?

There are some things that do appear concerning at first glance, such as the addition of [more profiles than TTML1](http://w3c.github.io/ttml2/spec/ttml2.html#vocabulary-profile-standard-designators) when profiles generally haven't worked well for widespread interoperability of Web specifications, and the increased [styling attribute vocabulary](http://w3c.github.io/ttml2/spec/ttml2.html#styling-attribute-vocabulary) (substantially larger than the [vocabulary in TTML1](https://www.w3.org/TR/ttaf1-dfxp/#styling-attribute-vocabulary)) that includes a bunch of attributes that look a lot like CSS and a bunch that don't.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/w3ctag/spec-reviews/issues/138#issuecomment-253378986