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RDFStore::Resource(3) User Contributed Perl Documentation RDFStore::Resource(3)

RDFStore::Resource - An RDF Resource Node implementation

        use RDFStore::Resource;
        my $resource = new RDFStore::Resource("http://pen.jrc.it/index.html");
        my $resource1 = new RDFStore::Resource("http://pen.jrc.it/","index.html");

        print $resource->toString." is ";
        print "not"
                unless $resource->equals($resource1);
        print " equal to ".$resource1->toString."\n";

        # or from URI object    
        use URI;
        $resource = new RDFStore::Resource("http://www.w3.org/1999/02/22-rdf-syntax-ns#","Description");
        $resource1 = new RDFStore::Resource( new URI("http://www.w3.org/1999/02/22-rdf-syntax-ns#Description") );

        print $resource->toString." is ";
        print "not"
                unless $resource->equals($resource1);
        print " equal to ".$resource1->toString."\n";

        my $resource = new RDFStore::Resource([ a,{ d => 'value'}, [ 1,2,3] ]);
 
        print $resource->toString." is ";
        print "not"
                unless($resource->isbNode);
        print " anonymous\n";

An RDF Resource Node implementation which support the so called anonymous-resources or bNodes (blankNodes)

new ( LOCALNAME_NAMESPACE [, LOCALNAME ] )
This is a class method, the constructor for RDFStore::Resource. In case the method is called with a single perl scalar as parameter a new RDF Resource is created with the string passed as indentifier (LOCALNAME); a fully qualified RDF resource can be constructed by invoching the constructor with two paramters where the former is the NAMESPACE and the latter is the LOCALNAME. By RDF definition we assume that LOCALNAME can not be undefined. If LOCALNAME is a perl reference the new Resource is flagged as anonymous-resource or bNode :)

bNodes can be created either passing a perl reference to the constructor or by using the RDFStore::NodeFactory(3) createbNode() or createAnonymousResource() methods; the latter is actually setting the RDFStore::Resource internal bNode flag.

isAnonymous
Return true if the RDF Resource is anonymous or is a bNode
isbNode
Return true if the RDF Resource is anonymous or is a bNode
getURI
Return the URI identifing the RDF Resource; an undefined values i returned if the node is blank or anonymous.
getNamespace
Return the Namespace identifier of the Resource
getLocalName
Return the LocalName identifier of the Resource; if the Resource is anonymous (bNode) the Storable(3) representation of the label is returned instead. This will allow to distinguish bNodes between normal resources and give them a kind of unique identity. NOTE See RDFStore::Model(3) to see how actually bNodes are being stored and retrieved in RDFStore(3).
getLabel
Return the URI identifing the RDF Resource.
equals
Compare two RDF Resources either textual
getNodeID
Return the rdf:nodeID if the Resource is anonymous (bNode).
getbNode
Return the bNode conent.

RDFStore::RDFNode(3)

 http://www.w3.org/TR/rdf-primer/

 http://www.w3.org/TR/rdf-mt

 http://www.w3.org/TR/rdf-syntax-grammar/

 http://www.w3.org/TR/rdf-schema/

 http://www.w3.org/TR/1999/REC-rdf-syntax-19990222 (obsolete)

        Alberto Reggiori <areggiori@webweaving.org>

Hey! The above document had some coding errors, which are explained below:
Around line 183:
You forgot a '=back' before '=head1'
2006-06-19 perl v5.32.1

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