Apache Jena System

A Apache Jena System is a Java-based Semantic graph framework.

• Example(s):
  • apache-jena-3.0.1.
• Counter-Example(s):
  • Sesame RDF Framework.
  • OntoText OWLIM.
  • Virtuoso Universal Server.
  • Protégé.
• See: RDF, OWL, SPARQL, HP Labs, Reasoning System.

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References

2011

• (Wikipedia, 2011) ⇒ http://en.wikipedia.org/wiki/Jena_(framework)
  • QUOTE: 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 and updated through SPARUL.

    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 graph s to:

    • a relational database
    • RDF/XML
    • Turtle
    • Notation 3

2009

• http://jena.sourceforge.net/
  • Jena is a Java framework for building Semantic Web applications. It provides a programmatic environment for RDF, RDFS and OWL, SPARQL and includes a rule-based inference engine.
  • Jena is open source and grown out of work with the HP Labs Semantic Web Programme.
  • The Jena Framework includes:
    • A RDF API
    • Reading and writing RDF in RDF/XML, N3 and N-Triples
    • An OWL API
    • In-memory and persistent storage
    • SPARQL query engine

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