Re: let authors choose text/html or application/xhtml+xml (detailed review of section 1. Introduction)

Sam Ruby wrote:
> 
> Dean Edridge wrote:
>>
>> As soon as the document is given the media type "text/html" it becomes 
>> a HTML document, simple as that.
> 
> Unless, of course, said document happens to contain the the following 
> bytes in the first 512 octets:
> 
>   0x3C 0x72 0x73 0x73

Can you give a reference for this statement ?  I would support Dean's
assertion, but cannot locate a definitive statement to this effect
at the time of writing.

Philip TAYLOR