[imsc] Pull Request: Defer to TTML2 for security and privacy considerations

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

== Defer to TTML2 for security and privacy considerations  ==
Closes #280

See https://github.com/w3c/imsc/pull/307

Received on Monday, 22 January 2018 21:51:07 UTC