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Re: Compatibility with XHTML2

From: Lachlan Hunt <lachlan.hunt@lachy.id.au>
Date: Mon, 16 Jul 2007 11:49:27 +1000
Message-ID: <469ACEA7.6070507@lachy.id.au>
To: Robert Burns <rob@robburns.com>
CC: HTML WG <public-html@w3.org>

Robert Burns wrote:
> On Jul 15, 2007, at 7:35 PM, Maciej Stachowiak wrote:
>> Is there a draft of XHTML2 yet that uses the XHTML1 namespace? ...
> My understanding was that the current namespace is used as a convenience 
> or temporary namesapce placeholder. That is until the draft reaches a 
> certain status, it is expected to use this  other temporary namespace. 
> If I understand correctly this temporary namespace had nothing to do 
> with the eventual aim of the WG. In other words it wasn't meant to be 
> read s not using the original HTML namespace.

It doesn't really matter if the XHTML2 WG attempt to reuse the XHTML1 
namespace, they will fail if they try.  As I, and others, have explained 
previously, XHTML2 is fundamentally incompatible with XHTML1 and simply 
cannot reuse its namespace without breaking compatibility.

If they do reuse the namespace, it will be impossible for a UA to 
support both XHTML1 and XHTML2 at the same time, and so it is both 
unnecessary and impossible for XHTML5 to be compatible with XHTML2 by 

Even if they don't reuse the namespace, XHTML2 is designed for a 
completely different market from XHTML1/XHTML5, and (even though it 
would be theoretically possible) it seems unlikely that both will be 
implemented side by side anyway.

So I'd like to remind everyone that XHTML2 is completely irrelevant and 
unrelated to XHTML5 and that attempting to design for compatibility 
between them is not a goal.

Lachlan Hunt
Received on Monday, 16 July 2007 01:49:38 UTC

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