[ttml2] Pull Request: Contextualize 'considered an error' (#1067).

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

== Contextualize 'considered an error' (#1067). ==
Closes #1067.

See https://github.com/w3c/ttml2/pull/1098

Received on Sunday, 26 May 2019 16:15:58 UTC