[whatwg] Introduction of media accessibility features

[Anne van Kesteren]

On Thu, 15 Apr 2010 13:00:06 +0900, Silvia Pfeiffer  
<silviapfeiffer1 at gmail.com> wrote:
> CSS is much tighter linked to HTML than a timed text format. If your
> UA happens to not support TTML, only one feature will be missing, i.e.
> timed text on your video. That doesn't destroy your Web page. But lack
> of CSS support does.

CSS is by design, optional. I would hope a captioning format is not, since  
captions are somewhat essential content information.


-- 
Anne van Kesteren
http://annevankesteren.nl/