In that case, you can either use a promiscuous parser, or add a GRDDL profile that does RDFa. (Though there remain validation issues, of course.)
We need to be realistic, too: the flag may be part of the spec, but the parsers will parse what they want to parse, with or without a flag. There's only one parser to run here, and the meaning is really never ambiguous. -Ben Elias Torres wrote: > Will RDFa ever work on HTML4? What would we do in the scenario? > > -Elias