[ttml2] Pull Request: Update [URI] to reference RFC3986 (#504).

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

== Update [URI] to reference RFC3986 (#504). ==
Closes #504.

See https://github.com/w3c/ttml2/pull/505

Received on Saturday, 23 December 2017 00:15:29 UTC