ActiveRDF is a library for accessing RDF data from Ruby programs and can be used as data layer in Ruby-on-Rails, allowing you to rapidly create semantic web applications.
ActiveRDF gives you a domain specific language for your RDF model: you can address RDF resources, classes, properties, etc. programmatically, without queries.
ActiveRDF can be used with various RDF stores, adapters to other stores can be written very easily. ActiveRDF uses convention over configuration, which means it works very nicely in 90% of the cases. ActiveRDF is still in very young stages, and is in active development. It probably contains a lot of bugs. ActiveRDF is open source, released under the GPL license.
All bugs Latest bugs reported
Bug #914513: Cannot even require activerdf without an error
Reported on 2012-01-10
Bug #374923: << memory leak with jruby on glassfish
Reported on 2009-05-11
Bug #317853: SparqlAdapter not enabled
Reported on 2009-01-16
Bug #316930: rdflite gem has an undeclared dependency on the mime-types gem
Reported on 2009-01-14
Bug #287324: sparql adaptor test fails in test_language
Reported on 2008-10-22