[ttml2] Pull Request: Deprecate rather than obsolete ttp:feature value "use" (#357).

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

== Deprecate rather than obsolete ttp:feature value "use" (#357). ==
Closes #357.

See https://github.com/w3c/ttml2/pull/537

Received on Saturday, 6 January 2018 01:15:35 UTC