Jena2
Jena2 - A Semantic Web Framework
Java toolkit for manipulating RDF models from HP Labs Bristol
- ARP - RDF/XML Parser
- Persistence - MySQL, Oracle and Postgres
- Ontology Subsystem - API for managing RDF, RDFS, OWL
- Reasoning Subsystem - Inference capabilities for RDFS and OWL
- RDQL query language
Jena is powerful, flexible and easy Java based toolkit for developing applications within the Semantic Web.