So, after some beta-testing, the W3C Markup Validation Service is now available in a stable version. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, and: XHTML+RDFa … try it out!
In case you successfully pass the validation, you’ll be rewarded with an icon stating that you have produced valid XHTML + RDFa.
You can then choose between two versions:
or
PS: In case you need some material to play around, have a look at the RDFa Test Case repository.

Seems to be quite a discussion [1] about the new bits in the validator. I really should be cautious what and when to blog
Sorry for any inconveniences and confusions!
Cheers,
Michael
[1] http://lists.w3.org/Archives/Public/public-rdf-in-xhtml-tf/2007Aug/0071.html
8 Aug 2007 at 15:02
[...] Quelle: RDFa.info [...]
2 Mar 2008 at 14:42