[whatwg] Validation

Why is it okay for a document to not specify its HTML version?  
Do all browsers ignore it?  

How should a validator handle lack of HTML version info when the next
standard is released with no DOCTYPE?

Should validators ignore older HTML version numbers which are listed in

Why aren't MIME type version numbers included in HTTP Accept headers?
Looks like it would be a valid HTTP/1.1 "accept-extension": 

  Accept: text/html; q=0.9; v=4.01, application/xhtml+xml; q=1; v=1.1, */*; q=0.1

I don't see anything about registering accept-extensions.

"Let's just say that if complete and utter chaos was lightning, then
he'd be the sort to stand on a hilltop in a thunderstorm wearing wet
copper armour and shouting 'All gods are bastards'." - The Color of Magic

Received on Monday, 20 July 2009 12:01:54 UTC