[ttml2] Pull Request: Resolve confusion between default and implicit (#590).

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

== Resolve confusion between default and implicit (#590). ==
Closes #590.

See https://github.com/w3c/ttml2/pull/652

Received on Monday, 12 February 2018 03:48:25 UTC