Jena is Java toolkit for developing semantic Web applications. It includes an RDF API, ARP, an RDF parser used for the W3C semantics Web sandbox, RDQL , and a DAML API.

Jena is Java toolkit for developing semantic web applications based on W3C recommendations for RDF and OWL. It provides an RDF API; ARP, an RDF parser; SPARQL, the W3C RDF query language; an OWL API; and rule-based inference for RDFS and OWL.

Open source Java-based framework built by HP Labs for building RDF-based Semantic Web applications.

the battle in 1806 in which Napoleon decisively defeated the Prussians

Jena is a town in central Germany on the River Saale. With a population of 102,442 (as of 31 December 2004) it is the third biggest town in the federal state of Thuringia.