Gregg Kellogg

 Just pushed version 0.5.1 of RdfContext to GitHub and Gemcutter. This version includes a Serializer framework, including a AbstractSerializer, RecursiveSerializer and Turtle and RDF/XML serializers based on these. The RDF/XML serializer is a big improvement over the previous version, including Typed element names an RDF Container folding using parseType="collection".

RdfContext includes native Ruby parsers for RDF/XML, RDFa and N3-rdf, which includes Turtle and N-Triples. All parsers pass W3C tests (included in specs). It also includes context-aware quad store, with in-memory and SQLite3 storage models.

I've released version 0.4.4 of the RdfContext gem. As the name implies, RdfContext supports contextual data-stores bound to graphs, along with a ConjunctiveGraph providing the union of contexts within a given data-store.

• Parses RDF/XML, RDFa and N3. RDF/XML and RDFa both pass all relevant W3C test cases (may be run through specs).
• Graph and ConjunctiveGraph with pluggable data-stores. MemoryStore and SQLite3Store both support contexts as well as quoted-graphs and formulae, although no appropriate graph classes yet exist.
• Graphs serialize to N-Triples and RDF/XML.
• An RDF distiller runs on this site to test out different parsers. This is also useful for running automated RDFa Test Harness. 

RdfContext is based, in part on Tom Morris' Reddy gem. See the readme on GitHub for more information. MemoryStore, SQLite3Store and ConjunctiveGraph are largely ports of Python RDFLib.

I just released version 0.1.0 of the rdfa_parser_gem. This parser is written in pure Ruby and uses Nokogiri XML parsing. It passes all XHTML1 test cases and most of the existing test cases for HTML4 and HTML5.

The gem is based on previous work done by Ben Adida and some libraries borrowed from the Reddy Gem.

The project is hosted on GitHub, feel free to clone. You can try out the parser through a distiller.