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ANN: NG4J 0.6 with GRDDL and <link> support

From: Richard Cyganiak <richard@cyganiak.de>
Date: Fri, 20 Apr 2007 19:11:28 +0200
Message-Id: <AB454D03-9F8B-414E-9FAB-F5FFC5D58D7E@cyganiak.de>
Cc: Chris Bizer <chris@bizer.de>, Jesper Zedlitz <jesper@zedlitz.de>, "Stelios G. Sfakianakis" <ssfak@ics.forth.gr>
To: Semantic Web <semantic-web@w3.org>, jena-dev@yahoogroups.com

Hi all,

We have just released version 0.6 of the Named Graphs API for Jena.  
The most prominent changes are to the Semantic Web Client Library  
[1]: The client now automatically applies GRDDL transformations to  
HTML pages, and follows <link> headers to find additional RDF  
documents. This allows the client library to answer queries like the  
following against the Web:

    # Events that DanC will attend, GRDDLed from his homepage
    PREFIX v: <http://www.w3.org/2002/12/cal/icaltzd#>
    SELECT ?event ?prop ?value
    WHERE {
       ?event v:attendee <http://www.w3.org/People/Connolly/#me> .
       ?event ?prop ?value
    }

    # Friends of the person whose homepage is at
    # <http://richard.cyganiak.de/>, found via embedded
    # <link> header
    SELECT ?friend_name ?friend_homepage WHERE {
        ?p1 foaf:homepage <http://richard.cyganiak.de/> .
        ?p1 foaf:knows ?p2 .
        ?p2 foaf:name ?friend_name .
        ?p2 foaf:homepage ?friend_homepage .
    }

NG4J 0.6 can be downloaded from the NG4J web site [2].

Many thanks to Stelios Sfakianakis and Jesper Zedlitz for their  
contributions to this version.

Cheers,
Richard Cyganiak and Chris Bizer

[1] http://sites.wiwiss.fu-berlin.de/suhl/bizer/ng4j/semwebclient/
[2] http://sites.wiwiss.fu-berlin.de/suhl/bizer/ng4j/
Received on Friday, 20 April 2007 17:11:43 GMT

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