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Re: Backward-compatibility of text/html media type (ACTION-334, ACTION-364)

From: Julian Reschke <julian.reschke@gmx.de>
Date: Tue, 02 Feb 2010 16:15:00 +0100
Message-ID: <4B684174.5030102@gmx.de>
To: Anne van Kesteren <annevk@opera.com>
CC: Dan Connolly <connolly@w3.org>, "Henry S. Thompson" <ht@inf.ed.ac.uk>, www-tag@w3.org
Anne van Kesteren wrote:
> On Tue, 02 Feb 2010 16:05:30 +0100, Julian Reschke 
> <julian.reschke@gmx.de> wrote:
>> So, just to be clear: once the text/html registration is changed to 
>> HTML5, I can't serve
>>
>>    http://greenbytes.de/tech/webdav/rfc2616.html
>>
>> as text/html anymore, as the document does not conform to HTML5 (due 
>> to head/@profile). Unless, of course, the definition of conformance is 
>> changed back to allow it.
> 
> Actually, you can, it just won't be conforming. You can serve "foobar" 
> as text/xml too.

That's exactly what the rules for re-registering a MIME type forbid -- 
making previously conforming content non-conforming.

Again:

    Changes should be requested only when there are serious omissions or
    errors in the published specification.  When review is required, a
    change request may be denied if it renders entities that were valid
    under the previous definition invalid under the new definition.

(<http://tools.ietf.org/html/rfc4288#section-9>)

Best regards, Julian
Received on Tuesday, 2 February 2010 15:15:37 GMT

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