[ttml1] Update Annex L intro per TTML2 modifications

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

== Update Annex L intro per TTML2 modifications ==
See https://github.com/w3c/ttml2/issues/478

Please view or discuss this issue at https://github.com/w3c/ttml1/issues/314 using your GitHub account

Received on Tuesday, 2 January 2018 19:56:32 UTC