[ttml2] Pull Request: Enumerate named item tokens (#754).

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

== Enumerate named item tokens (#754). ==
Closes #754.

Note that we may end up removing `usesForced` depending on the outcome of #656, but for now, it is in the spec so I'm adding it as well.

Marking as editorial since schemas do not affect conformance.

See https://github.com/w3c/ttml2/pull/756

Received on Wednesday, 16 May 2018 21:48:13 UTC