Re: Timed tracks

On Fri, May 7, 2010 at 10:01 AM, Sean Hayes <>wrote:

> When CSS3 gets a little more mature, in say 10 years. Then TTML could
> migrate to it.

You won't be able to do that without breaking TTML content. But yes, one way
to make TTML more palatable would be to redefine TTML as a mapping into CSS.

> But to be clear, TTML is *defined* in terms of the semantics of XSL:FO,
> which is *defined* largely in terms of CSS; but it is its own thing, and it
> does not require either a full XSL:FO processor or a CSS one.

It requires a layout engine that behaves differently to CSS. I do not want
to add such an engine to Gecko, and I imagine other browser vendors feel the

"He was pierced for our transgressions, he was crushed for our iniquities;
the punishment that brought us peace was upon him, and by his wounds we are
healed. We all, like sheep, have gone astray, each of us has turned to his
own way; and the LORD has laid on him the iniquity of us all." [Isaiah

Received on Thursday, 6 May 2010 22:55:06 UTC