[ttml2] Pull Request: Note that profile combination is optional (#1032).

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

== Note that profile combination is optional (#1032). ==
Closes #1032.

See https://github.com/w3c/ttml2/pull/1057

Received on Tuesday, 26 March 2019 00:02:43 UTC