[ttml1] Pull Request: Specify semantics of fontSize in 'em' on region

palemieux has just submitted a new pull request for https://github.com/w3c/ttml1:

== Specify semantics of fontSize in 'em' on region ==
Close #206

See https://github.com/w3c/ttml1/pull/279

Received on Tuesday, 12 December 2017 05:59:33 UTC