[ttml2] Pull Request: Clarify that height term can mean horizontal axis in exceptional case…

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

== Clarify that height term can mean horizontal axis in exceptional case… ==
…s (#830).

Closes #830.

See https://github.com/w3c/ttml2/pull/851

Received on Thursday, 21 June 2018 17:54:13 UTC