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[imsc] `<percentage>` not defined

From: Nigel Megitt via GitHub <sysbot+gh@w3.org>
Date: Fri, 10 Feb 2017 13:57:10 +0000
To: public-tt@w3.org
Message-ID: <issues.opened-206802123-1486735029-sysbot+gh@w3.org>
nigelmegitt has just created a new issue for 
https://github.com/w3c/imsc:

== `<percentage>` not defined ==
The new attribute `ittp:activeArea` takes 4 of `<percentage>` but this
 is not defined. One place it could potentially be derived from is a 
subset of the TTML1SE definition of 
[`<length>`](https://www.w3.org/TR/ttml1/#style-value-length) however 
that definition of `percentage` is based on `number` which permits 
negative values; in the case of `ittp:activeArea` negative values are 
prohibited.

Steps to resolve:
* [ ] Clarify source of definition of `<percentage>`.
* [ ] If it's from TTML1SE as above then add a normative statement 
prohibiting negative values.


Please view or discuss this issue at 
https://github.com/w3c/imsc/issues/210 using your GitHub account
Received on Friday, 10 February 2017 13:57:20 UTC

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