[ttml2] Pull Request: Define [animatable style]; make targeting non-animatable style an error (#1153).

skynavga has just submitted a new pull request for https://github.com/w3c/ttml2:

== Define [animatable style]; make targeting non-animatable style an error (#1153). ==
Closes #1153.

See https://github.com/w3c/ttml2/pull/1154

Received on Thursday, 5 September 2019 05:17:27 UTC