[ttml2] Pull Request: Add link for temporally active region reference (#1074).

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

== Add link for temporally active region reference (#1074). ==
Closes #1074.

See https://github.com/w3c/ttml2/pull/1095

Received on Saturday, 25 May 2019 20:14:51 UTC