[ttml2] Add missing #display-version-2 feature.

skynavga has just created a new issue for https://github.com/w3c/ttml2:

== Add missing #display-version-2 feature. ==


Please view or discuss this issue at https://github.com/w3c/ttml2/issues/791 using your GitHub account

Received on Wednesday, 23 May 2018 22:18:49 UTC