[whatwg] RDFa statement consistency

[Ben Adida]

Kristof Zelechovski wrote:
> The goal of the specification is to provide a set of rules that conformant
> user agents must obey out of the box, without any extensions.  Features that
> are supposed to be ignored do not make good candidates for including in the
> specification, except as extensions to HTML that are explicitly supported.

We would be happy if RDFa were an extension to HTML5.

-Ben