[imsc] position allows `em` units

nigelmegitt has just created a new issue for https://github.com/w3c/imsc:

== position allows `em` units ==
Whereas `em` units are prohibited for use in `tts:origin` they are currently permitted in `tts:position` although `tts:origin` is not permitted if `tts:position` is used. I don't think that we agreed to permit the use of `em` units in `tts:position` so the constraint should be applied to `tts:position` also.

Please view or discuss this issue at https://github.com/w3c/imsc/issues/404 using your GitHub account

Received on Wednesday, 27 June 2018 16:40:17 UTC