W3C home > Mailing lists > Public > public-html-xml@w3.org > December 2010

Re: What problem is this task force trying to solve and why?

From: David Carlisle <davidc@nag.co.uk>
Date: Sun, 19 Dec 2010 18:20:33 +0000
Message-ID: <4D0E4CF1.1010906@nag.co.uk>
To: John Cowan <cowan@mercury.ccil.org>
CC: public-html-xml@w3.org
On 19/12/2010 03:01, John Cowan wrote:
> It's well-formed XML all right, but it isn't valid HTML.  I at least
> don't care what happens to invalid HTML when you parse it.  Anyone who
> is generating HTML now should be generating valid HTML.

yes, that cut down example, but it was a very tortuous process that got 
us to a state where it was possible to have mathml annotation-xml that 
could contain html (basically as finally specced the parsing of 
annotation-xml as html or "foreign content" depends on the value of an 
attribute, which is workable but less than ideal.


It also means that svg foreign content, which is supposed to take 
arbitrary non-svg stuff can, in the html5 version, only take html 
(including mathml nested in <math>).

Thus the same issues bite even valid examples if you use the open 
content models of svn and mathml's extension elements.

If you include something in mathml that happens to share a local name 
with an html element, the entire math expression is force closed.
If you include something in svg foreign content that happens to use /> 
syntax it will miss-parse as foreigncontent reverts to the standard 
html5 conventions.

Received on Sunday, 19 December 2010 18:21:00 UTC

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