RDF2Go 3.1 released - A wrapper over Java triple stores

Hi,

  today  we  released [1] a  new  version  of RDF2Go [2],
  a  simple  wrapper  over  Java  triple  stores, similar in spirit of
  Jakarta Commons Logging.
  
  It allows developers to un-tangle their semantic web applications
  from a specific store and thus profit from using always the best
  store (performance, features).

  RDF2Go currently comes with adaptors for:
  ----------------------------------------
  - Jena 2.2  (bug with arbitrary non-XSD datatypes in literals)
  - Jena 2.3
  - Sesame 1  (has no SPARQL support)
  - Sesame 2  (bug  in  Sesame2: Context URL cannot be retrieved.
  Queries don't work yet.)
  - YARS (language  tagged literals bug, YARS adapter currenlty
  refactored by YARS developer Andreas Harth. SPAQRL not supported.)
  - NG4J (no SPARQL support in adaptor, TRIQ available)
  - JCR (with JackRabbit)
  All adaptors incl. all needed libraries can be downloaded from [1].
  Writing new adaptors is easy, only 6 methods have to be implemented.

  Features:
  --------
  - add and remove triples with one-method-call
  (this is almost like the patented one-click-shopping)
  - query for triple patterns
  - SPARQL (not all stores support it)
  - full support for quad stores
  - built-in URIs for RDF, RDFS, XSD
  - NO  support  for parsing: use the supplied parser from the
    triple stores instead. We don't re-implement everyhing.

  RDF2Go maps RDF to Java as follows:
  ----------------------------------
    uri                      -  java.net.URI
    blank node               -  org.ontoware.rdf2go.BlankNode
    plain literal            -  java.lang.String
    language tagged literal  -  org.ontoware.rdf2go.LanguageTagLiteral
    datatyped literal        -  org.ontoware.rdf2go.LanguageTagLiteral

  This allows to add statements as simple as

    // assume some URIs have been created
    URI mike = new URI("urn://mike");
    URI foafName = new URI("http://foaf.com#name");

    // add triple
    model.addStatement( mike, foafName, "Mike Müller" );


  Further Information
  -------------------
    - More about the workflow using RDF2Go can be found at [2].
    - A  paper  describing RDF2Go in brief can be found at [3] (skip other
      sections).
    -  There  are a number of related approaches, but to our knowledge
    none  is  a  simplistic  and  comes  with  such  a large number of
    adapters. Related approaches are KPOntology [4], Trippi [5] and of
    course the inventor of all these [6].

  References
  ----------
    [1] http://ontoware.org/frs/?group_id=37&release_id=173
    [2] http://rdf2go.ontoware.org
    [3] http://m3pe.org/seminar/voelkel.pdf
    [4] http://kpontology.isoco.com/download.html
    [5] http://trippi.sourceforge.net/
    [6] http://www-db.stanford.edu/~melnik/rdf/api.html

  Gimmick
  -------
  The  first  person  who  emails me and wants to write an adaptor for
  another  triple  (or  quad) store gets my immediate personal support
  ;-)

Kind regards,

  Max Völkel
--
Dipl.-Inform. Max Völkel, Universität Karlsruhe / FZI
        http://nepomuk.semanticdesktop.org
voelkel@fzi.de   +49 721 9654-854   www.xam.de

Workshop  on  Semantic  Wikis:  http://semwiki.org  -  Deadline Extended!

Received on Thursday, 9 March 2006 16:52:26 UTC