[ttml2] Pull Request: Clarify that metadata has no presentation semantics (#656).

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

== Clarify that metadata has no presentation semantics (#656). ==
Closes #656.

See https://github.com/w3c/ttml2/pull/665

Received on Tuesday, 13 February 2018 00:16:40 UTC