Re: Discussion with Ian and Henri about HTML5+RDFa (part 2/2)

Mark Birbeck wrote:
> Hi Julian,
> 
> I'm afraid it's the use of full URIs in @rel that is not backwards
> compatible, as I explained, since it makes every value, such as "next"
> or "foo", into a relative path.
> 
> That in itself wouldn't be a problem except for the fact that you
> can't have *both* predefined and user-defined values being relative
> paths against the same base URI.

You can, if you introduce a registry for the short names (such as the 
Atom feed format did).

> By the way, how is RDFa's use of @rel not backwards-compatible?

It will conflict with the use of full URIs.

BR, Julian