[ttml2] Pull Request: Clarify 'any attribute' language (#879).

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

== Clarify 'any attribute' language (#879). ==
Closes #879.

See https://github.com/w3c/ttml2/pull/880

Received on Wednesday, 4 July 2018 18:04:22 UTC