[ttml2] #extent-length and #extent-measure should be complementary

palemieux has just created a new issue for https://github.com/w3c/ttml2:

== #extent-length and #extent-measure should be complementary ==
... otherwise a content profile cannot prohibit all `<measure>` expressions but `<length>` values 

Please view or discuss this issue at https://github.com/w3c/ttml2/issues/846 using your GitHub account

Received on Thursday, 21 June 2018 13:45:15 UTC