- From: Chris Bizer <bizer@gmx.de>
- Date: Fri, 25 Feb 2005 15:35:54 +0100 (MET)
- To: semantic-web@w3.org
Hi all, we have released NG4J - Named Graphs API for Jena version 0.4 today. New in 0.4: - a new Semantic Web Publishing (SWP) API - an improved TriQL query engine - multiple bug fixes. Named Graphs are a simple extension to the RDF abstract syntax, enabling statements about RDF graphs: http://www.w3.org/2004/03/trix/ The W3C Data Access Working Group is using a similar notion as abstract syntax for SPARQL. Their RDF Dataset is a set of named graphs plus one distinct unlabelled 'background graph': http://www.w3.org/TR/rdf-sparql-query/#rdfDataset NG4J is an extension to the Jena Semantic Web framework which adds support for Named Graphs, TriX, TriG, TriQL and SWP to Jena. NG4J's new Semantic Web Publishing API provides methods for adding meta-information like propsitional attitudes to graphs and for signing graphsets using digital signatures. The API implements the Semantic Web Publishing vocabulary (SWP), which is described in: http://www.hpl.hp.com/techreports/2004/HPL-2004-57 It's RDF schema is found at: http://www.wiwiss.fu-berlin.de/suhl/bizer/TriQLP/swp/swp-2.n3 An example of a graphset which has been signed using SWP-2 is found here: http://www.wiwiss.fu-berlin.de/suhl/bizer/TriQLP/swp/SWP2-AssertWithSignature-Example.trig NG4J is available under BSD license and can be downloaded from: http://www.wiwiss.fu-berlin.de/suhl/bizer/ng4j/ We hope that NG4J, as an implementation of Named Graphs for the popular Jena framework, encourages experimentation in areas of advanced Semantic Web development such as provenance tracking, versioning, access control, privacy and trust. Lots of thanks to Rowland Watkins for his work on the SWP API. Cheers, Chris -- DSL Komplett von GMX +++ Supergünstig und stressfrei einsteigen! AKTION "Kein Einrichtungspreis" nutzen: http://www.gmx.net/de/go/dsl
Received on Friday, 25 February 2005 14:36:28 UTC