[ttml2] Pull Request: Issue 1204 positioning example

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

== Issue 1204 positioning example ==
Closes #1204 by adding a note and an example.

During w3c/ttwg#107 @skynavga objected to moving the region specification in the last example from the `body` element to the `div` element and instead suggested adding an explanatory note.

This pull request does that, and also adds a further example document showing content in two regions, overlapping temporally. The sample renderings are generated by sandflow/imscJS based on the source added at `spec/images/sources/example-complex-layout.ttml` - this necessarily includes both `tts:origin` and `tts:position` because that library currently does not support `tts:position` (since it is not part of IMSC). The example in the specification document omits the `tts:origin`.

See https://github.com/w3c/ttml2/pull/1207

Received on Friday, 17 April 2020 15:24:55 UTC