[whatwg] A few questions on HTML5
Jukka K. Korpela
jkorpela at cs.tut.fi
Tue Jan 3 03:07:00 PST 2012
2012-01-03 12:45, Bronislav Klučka wrote:
> On 3.1.2012 10:32, Mani wrote:
>> 2. Will XHTML5 have a DTD, because XHTML5 must be well-formed?
To find an answer to the question that was asked, one needs to read
quite a lot between the lines in the cited documents. The answer appears
to be “No, XHTML5 won’t have a DTD, since you’re supposed to use a
validator specifically written for HTML5.”
Allowing XHTML 1.0 and XHTML 1.1 DOCTYPEs as “obsolete but conforming”
and not saying a word about any DTD that sovers any of the HTML5
novelties looks like a clear indication of intent.
Well-formedness requirement does not imply the need for a DTD at all. Au
contraire, “well-formed” is just a confusing term for conformance to
generic XML rules (“well-formed XML” really means nothing but “XML”), as
opposite to any rules in a DTD for example.
This appears to mean that when XHTML5 is used together with other XML
tag sets, you cannot use a DTD-based validator just by adding the
declarations for the other tags into an XHTML5 DTD. So the question
really is: will someone want to validate, say, XHTML5 + MathML documents?
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