>> Neither RDFa, nor Microdata are extension mechanisms that allow adding >> "independently developed vocabularies" to HTML. > > Could you describe the criteria by which one can recognise a mechanism for > allowing the addition of independently developed vocabularies? I'm baffled > as to what the point of RDFa and Microdata would be if not exactly that.
I agree, RDFa and Microdata are clearly extension mechanisms. That said, I believe Julian and Larry disagree because they appear to believe an extension mechanism must allow for the addition of novel elements and attributes, e.g. <foo bar="">baz</foo>. Julian, Larry, please correct me if I've misunderstood you. I think this is why any discussion of distributed extensibility ends up with people talking past each other: some people believe such extensibility requires the ability to make custom things go right after the < sign, and some people don't. (FWIW, I don't.) -- Edward O'Connor
