- From: Ian Hickson <ian@hixie.ch>
- Date: Fri, 20 Feb 2009 10:31:37 +0000 (UTC)
- To: Robert J Burns <rob@robburns.com>
- Cc: HTML WG <public-html@w3.org>
On Thu, 19 Feb 2009, Robert J Burns wrote: > > > > The only problem I was trying to show is that an implementation that > > implements both XHTML2 and XHTML1 in the same namespace would be faced > > with an irreconcilable difference in semantics when an element in the > > "http://www.w3.org/1999/xhtml" namespace with the tag name "img" is > > created without any other context, since the two specs have conflicting > > requirements (or rather, since XHTML2 has requirement that conflict with > > the requirements imposed by legacy content). This is merely intended to > > show that if XHTML2 does use the same namespace as XHTML1, the two > > languages cannot be sanely implemented in the same user agent. > > Certainly it can be implemented by the same user agent, it just requires > error-handling specified either in a standard fashion or by each > individual user agent. No, as described in my earlier e-mails, the two specifications actually have contradictory requirements. > > and that any compatibility issue that XHTML2 has is actually not a > > clash with XHTML5 but a clash with XHTML1. > > We still haven't identified any clashes at all (none that cannot be > handled by some basic error-handling). The failure of HTML5 to specify > such error handling is a problem as far as I am concerned. No, HTML5 actually does fully define the error handling here, as described in my earlier e-mails. In might not be the error handling you _want_, but that's a different matter. The rest of your e-mail was about XHTML2, which I will leave up to the XHTML2 working group to respond to. -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Received on Friday, 20 February 2009 10:32:13 UTC