Raptor is a free software / Open Source C library that provides a set
of parsers and serializers that generate Resource Description Framework
(RDF) triples by parsing syntaxes or serialize the triples into a
syntax. The supported parsing syntaxes are RDF/XML, N-Triples, TRiG,
Turtle, RSS tag soup including all versions of RSS, Atom 1.0 and 0.3,
GRDDL and microformats for HTML, XHTML and XML. The serializing
syntaxes are RDF/XML (regular, and abbreviated), N-Triples, RSS 1.0,
Atom 1.0 and Adobe XMP.