Tools

• Jena
• Joseki
• Semantic portals
• Brownsauce

For some time researchers at HP Labs have been developing a Java-based open source semantic web toolkit. Called Jena, it has already achieved a leading position amongst Semantic Web developers, and is in widespread use within the community. HP believes that the existence of high quality readily available Semantic Web tools is crucial if the Semantic Web approach is to fulfil its promise. Such toolkits would enable the development of myriad example applications, helping to embody the Semantic Web vision and encouraging its adoption by the industry at large and by individuals all over the world. By making the HP toolkit open source, we hope to encourage participation in its development by others elsewhere in the Semantic Web community.

For Jena support, there is a tutorial and a discussion group

Joseki is a WebAPI for the remote query and update of RDF models. The system comprises

• A client API providing convenient access to the update and query operations of the RDF WebAPI protocol.

• An RDF server, which can run embedded in an application, as a standalone program, or as a web application inside a suitable application server. It provides the operations of query and update on models it hosts.

Joseki can be obtained from the Joseki download page on the Joseki site in various packagings.

• A complete system, including the Jetty webserver used when run embedded or standalone, and the web application WAR file. Source code, documentation and javadoc included. This can be quite big for downloading over a modem.

• The Joseki system, including the JAR file, source code, documentation and javadoc. Does not include the WAR file, the Jetty embedded web server or Jena.

• Just the web application file, suitable for Tomcat or Jetty

Further information on Joseki, including documentation, is available on the joseki site.

On completion of the SWAD-E Semantic Community Portals project, we made the semantic portal software available as a part of the Jena family of Semantic Web tools. The software can be downloaded from the SWED resources page, along with pilot thesauri and a Joseki access point for the data.

BrownSauce is an experimental generic RDF browser.