- From: Timed Text Working Group Issue Tracker <sysbot+tracker@w3.org>
- Date: Sun, 26 May 2013 02:25:56 +0000
- To: public-tt@w3.org
ISSUE-214 (negative padding): Negative padding lengths should be prohibited. [TTML 1.0] http://www.w3.org/AudioVideo/TT/tracker/issues/214 Raised by: Glenn Adams On product: TTML 1.0 I just noticed that, unlike fontSize and lineHeight, we don't specify that padding lengths must be non-negaive. Rather we have the following language: "If a specified value of this attribute is not supported, then a presentation processor must interpret the attribute as if the value 0px were specified." I believe this was an oversight, since CSS 2 [1] states "Unlike margin properties, values for padding values cannot be negative." [1] http://www.w3.org/TR/2008/REC-CSS2-20080411/box.html#padding-properties To resolve, I will add language proscribing negative lengths to section 8.2.1.6 [2]. [2] https://dvcs.w3.org/hg/ttml/raw-file/default/ttml10/spec/ttaf1-dfxp.html#style-attribute-padding
Received on Sunday, 26 May 2013 02:25:59 UTC