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)
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.
Return true if the RDF Resource is anonymous or is a bNode
Return true if the RDF Resource is anonymous or is a bNode
Return the URI identifing the RDF Resource; an undefined values i returned if the node is blank or anonymous.
Return the Namespace identifier of the Resource
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).
Return the URI identifing the RDF Resource.
Compare two RDF Resources either textual
Return the rdf:nodeID if the Resource is anonymous (bNode).
Return the bNode conent.
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>
