[ttml2] Pull Request: Specify fallback semantics for tts:textCombine (#725).

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

== Specify fallback semantics for tts:textCombine (#725). ==
Closes #725.

See https://github.com/w3c/ttml2/pull/733

Received on Friday, 11 May 2018 20:16:10 UTC