>> Correct. You can embed any other format you like using that module as 
>> long as the browser supports the MIME type. In fact, you can already 
>> do this in HTML 4.01 using the OBJECT element. To embed MathML for 
>> example.
> 
> Isn't there a difference? I.e. Edward probably wants to include document 
> fragments, but straight embedding only supports complete documents.
> F.e. with including the style rules from the including document apply, 
> with embedding they do not.

What was I thinking :-)

In that case I think XML Inclusions[1] might be useful. Although that 
would only work if a user agent supports both XML Inclusions and XHTML. 
(And mixing namespaces, obviously. But without support for that I don't 
see a reason why a user agent would support XHTML in the first way.)


[1]<http://www.w3.org/TR/2004/CR-xinclude-20040413/ >


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