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RDF::LDF - Linked Data Fragments client

Configuration

       url URL to retrieve RDF from.

           Experimental: more than one URL can be provided for federated search over many LDF endpoints.

               my $store = RDF::Trine::Store->new_with_config({
                       storetype => 'LDF',
                       url => [ $url1, $url2, $url3 ]
               });

               # or

               my $client = RDF::LDF->new(url => [ $url1, $url2, $url3 ]);

Contributors

       Patrick Hochstenbach, "patrick.hochstenbach at ugent.be"

       Gregory Todd Williams, "greg@evilfunhouse.com"

       Jacob Voss, "voss@gbv.de"

Description

       RDF::LDF implements a basic Linked Data Fragment <http://linkeddatafragments.org/> client.

       This a low level module to implement the Linked Data Fragment protocol. You probably want to use
       RDF::Trine::Store::LDF.

Methods

       get_statements( $subject, $predicate, $object )
           Return an iterator for every RDF::Trine::Statement served by the LDF server.

       get_pattern( $bgp );
           Returns a stream object of all bindings matching the specified graph pattern.

Name

       RDF::LDF - Linked Data Fragments client

Synopsis

           use RDF::Trine::Store::LDF;
           use RDF::Trine::Store;

           # To use a HTTP cache:
           use LWP::UserAgent::CHICaching;
           my $cache = CHI->new( driver => 'Memory', global => 1 );
           my $ua = LWP::UserAgent::CHICaching->new(cache => $cache);
           RDF::Trine->default_useragent($ua);

           my $store = RDF::Trine::Store->new_with_config({
                   storetype => 'LDF',
                   url => $url
           });

           my $it = $store->get_statements();

           while (my $st = $it->next) {
               # $st is a RDF::Trine::Statement
               print "$st\n";
           }

           # Or the low level modules themselves

           use RDF::LDF;

           my $client = RDF::LDF->new(url => 'http://fragments.dbpedia.org/2014/en');

           my $iterator = $client->get_statements($subject, $predicate, $object);

           while (my $statement = $iterator->()) {
               # $model is a RDF::Trine::Statement
           }

See Also