A parser for the RDFa syntax, W3C Candidate Recommendation 20 June 2008 which allows reading XHTML and XML as RDF triples by interpreting attributes on elements to describe which ones have RDF semantics. This is implemented via librdfa linked inside Raptor, written by Manu Sporny of Digital Bazaar, and licensed with the same license as Raptor.

This parser is beta quality and passes all but 4 of the RDFa tests as of Raptor 1.4.18.