[imsc] Pull Request: Remove tts:lineShear and tts:shear from negative length requirement

palemieux has just submitted a new pull request for https://github.com/w3c/imsc:

== Remove tts:lineShear and tts:shear from negative length requirement ==
Closes #453

See https://github.com/w3c/imsc/pull/454

Received on Thursday, 6 September 2018 14:33:14 UTC