[ttml2] Pull Request: Make metadata content model consistent with specification (#1169).

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

== Make metadata content model consistent with specification (#1169). ==
Closes #1169.

See https://github.com/w3c/ttml2/pull/1176

Received on Friday, 4 October 2019 03:15:54 UTC