[imsc] Behaviour if `ittp:activeArea` is non conformant is unclear

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

== Behaviour if `ittp:activeArea` is non conformant is unclear ==
The text:

> The Active Area SHALL NOT extend outside the root container in any 
dimension.

in [6.7.5 
ittp:activeArea](https://www.w3.org/TR/ttml-imsc1.0.1/#ittp-activeArea)
 does not indicate how the value should be treated if it _does_ extend
 outside the root container region. For example should it initially be
 clipped by the root container region, or moved so that the dimensions
 remain the same, if possible, and then if still needed, then clipped?

Please view or discuss this issue at 
https://github.com/w3c/imsc/issues/211 using your GitHub account

Received on Friday, 10 February 2017 14:00:56 UTC