|Developer(s)||HP Labs (until October 2009), then Apache Software Foundation|
|Stable release||2.12.0 / August 2, 2014|
|License||Apache License 2.0|
Apache Jena is an open source Semantic Web framework for Java. It provides an API to extract data from and write to RDF graphs. The graphs are represented as an abstract "model". A model can be sourced with data from files, databases, URLs or a combination of these. A Model can also be queried through SPARQL 1.1.
Jena is similar to Sesame; though, unlike Sesame, Jena provides support for OWL (Web Ontology Language). The framework has various internal reasoners and the Pellet reasoner (an open source Java OWL-DL reasoner) can be set up to work in Jena.
Jena supports serialisation of RDF graphs to:
Fuseki is an HTTP interface to RDF data. It supports SPARQL for querying and updating. The project is a sub-project of Jena and is developed as servlet. Fuseki can also be run stand-alone server as it ships preconfigured with the Jetty web server.
- Jena source code (Fuseki in a subdirectory)
- Jena project page
- Pellet reasoner project page
- Using Pellet from Jena with and without the DIG interface
- Using D2RQ to map relational database content as RDF
- Tutorial: Jena Semantic Web Framework
- An Introduction to Jena
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