ARQ - A SPARQL Processor for Jena

ARQ is a query engine for Jena.

Downloads

ARQ supports SPARQL, the query language being developed by the RDF Data Access Working Group.

Languages supported by ARQ:

• SPARQL
• ARQ, the engine's own language (access to experimental features)
• RDQL

Extensions supported:

• UNSAID - test to see whether a graph pattern is not present in the target data

Online Demo

Online Query Form for experimenting with SPARQL queries.

Documentation

Latest (online): [will be <http://jena.sourceforge.net/ARQ>]

• An Brief Introduction to SPARQL
• Frequently Asked Questions
• Command line utilities
• Application API - cover the majority of application usages
• Application Javadoc
• Advanced Application Use
• RDF datasets

Beyond basic application use:

• Constructing queries programmatically
• Extension mechanisms
• DESCRIBE handlers
• Constructing queries programmatically
• Full Javadoc, including internal interfaces

Resources

• SPARQL working draft
• XML Result Set format
• Turtle - a non-XML RDF serialization
• Online Query Form for experimenting with SPARQL queries.
• Joseki - the Jena RDF publishing server, provides the SPARQL protocol
• List of other SPARQL implementations
• List of other SPARQL demos

Contact and Support

Questions to the Jena mailing list <mailto:jena-dev@groups.yahoo.com>

Author: Andy Seaborne