RDFa is a specification for attributes to be used with XHTML or SVG Tiny to express structured data. The rendered, hypertext data of XHTML is reused by the RDFa markup, so that publishers don’t need to repeat significant data in the document content. The underlying abstract representation is RDF, which lets publishers build their own vocabulary, extend others, and evolve their vocabulary with maximal interoperability over time. pyRdfa is a distiller that generates the RDF triples from an (X)HTML+RDFa or SVG Tiny 1.2 file in various RDF serialization formats. It can either be used directly from a command line or via a CGI service. It corresponds to the RDFa Recommendation, published on the 14th of October, 2008, and, for the SVG version, to the SVG Tiny 1.2 Recommendation, published on the 22nd of December, 2008.