Very cool, but why didn't they use the existing RDFa format/keywords but invent their own? [ see http://en.wikipedia.org/wiki/RDFa http://en.wikipedia.org/wiki

Very cool, but why didn't they use the existing RDFa format/keywords but invent their own? [ see http://en.wikipedia.org/wiki/RDFa http://en.wikipedia.org/wiki/RDFa ] [ itemprop vs property ??? ] I guess when you are big G, you can do anything you want.