[ttml2] Pull Request: align initial values of tts:origin and tts:position

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

== align initial values of tts:origin and tts:position ==
closes #551
align initial values of tts:origin and tts:position
also remove mention of tt element in tts:position, as discussed
In the process of this last part, I had to move a note in the definition of the root container region. 

See https://github.com/w3c/ttml2/pull/569

Received on Thursday, 18 January 2018 21:21:31 UTC