[ttml1] no begin times in Pop-On example in Appendex O

mikedo has just created a new issue for https://github.com/w3c/ttml1:

== no begin times in Pop-On example in Appendex O ==


Please view or discuss this issue at 
https://github.com/w3c/ttml1/issues/224 using your GitHub account

Received on Thursday, 15 December 2016 14:49:02 UTC