Re: Can Open Graph Protocol be validated by W3C Markup Validation Service ?

On Sun, Jan 9, 2011 at 9:58 AM, Philip Taylor (Webmaster, Ret'd)
<P.Taylor@rhul.ac.uk> wrote:
> Are you in a position to be able to explain why RDFa chose to
> require a non-conformant syntax ?

HTML 4.01 conformance was not a goal for RDFa. Indeed, the original
conformance target seems to have been XHTML2.

RDFa needed a way to specify the property designated by arbitrary
elements. Overloading @name would not have been realistic, since @name
already has different meanings on different elements (e.g. as a
fragment identifier, as a form submission key). See also the original
note proposing RDFa:

http://www.w3.org/MarkUp/2004/02/xhtml-rdf.html

--
Benjamin Hawkes-Lewis