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Re: ISSUE-4: Versioning, namespace URIs and MIME types

From: Ian Hickson <ian@hixie.ch>
Date: Tue, 17 Feb 2009 23:04:19 +0000 (UTC)
To: Rob Sayre <rsayre@mozilla.com>
Cc: HTML WG <public-html@w3.org>
Message-ID: <Pine.LNX.4.62.0902172302280.6209@hixie.dreamhostps.com>
On Tue, 17 Feb 2009, Rob Sayre wrote:
> On 2/17/09 5:47 PM, Ian Hickson wrote:
> > Keeping legacy compatibility is pretty much the number one requirement and
> > design principle underpinning the HTML5 work. I don't think it's tradable.
> 
> Several parts of HTML5 are incompatible with the current behavior of IE 
> and Firefox. It seems to me that legacy compatibility has been traded, 
> sometimes.

If there are things in HTML5 that are incompatible with legacy content, 
please tell me, because that's a bug and should be fixed. As far as I'm 
aware, the only cases where HTML5 isn't compatible with legacy browsers is 
when the legacy content doesn't rely on the specific feature in question, 
or when there is content that relies on contradictory behavior, or when 
there is a security bug in the legacy behavior.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Tuesday, 17 February 2009 23:04:55 GMT

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