[ttml2] Ruby constraints cannot be validated prior to ISD construction (#1140)

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

== Ruby constraints cannot be validated prior to ISD construction ==
Validation of ruby constraints can only happen after ISD construction since:

* the `tts:ruby` style property can be set using `initial`
* ruby constraints are specified in terms of the computed value of the `tts:ruby` style property

Is that the intent, or are should ruby style properties be specified solely using:
* inline styling
* referential styling
* chained referential styling
* nested styling

Please view or discuss this issue at https://github.com/w3c/ttml2/issues/1140 using your GitHub account

Received on Wednesday, 14 August 2019 16:11:07 UTC