Validator Failure -//W3C//DTD XHTML+ARIA 1.0//EN

Ladies/Gentlemen-

To reiterate on a prior submitted feedback, the W3C Validator is not
supporting the XHTML+ARIA 1.0 DTD as it did prior to 4 Mar 2011.

On the simplest of Web documents, http://cprgltd.com, the Validator produces
the following errors wherein every element and attribute produce false
positives:

1.      DTD did not contain element declaration for document type name

2.      There is no attribute "xmlns"

3.      There is no attribute "xml:lang"

4.      Element "html" undefined

5.      Element "head" undefined

6.      Element "title" undefined

7.      Element "body" undefined

Obviously, on more complex and functional content pages, the false-positive
reported errors by the Validator will number in the thousands.

Granted there may be no more than thirty-three and one-third people who
validate against the XHTML+ARIA 1.0 DTD, such does not excuse away its
importance and the obvious failure of the Validator.

Resolution of the problem would be appreciated or at least a formal response
on why such issues cannot/will not be resolved/addressed, albeit use of a
custom DTD would solve the problems.

Thank you very much.