[ttml2] Pull Request: Added note specifying the mapping of tt:image to smpte:backgroundImage

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

== Added note specifying the mapping of tt:image to smpte:backgroundImage ==
Closes #460

See https://github.com/w3c/ttml2/pull/492

Received on Wednesday, 15 November 2017 04:08:44 UTC