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Perl Linked Data Fragments client
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README.md

NAME

RDF::LDF - Linked Data Fragments client

STATUS

Build Status Coverage Status Kwalitee Score

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
}

DESCRIPTION

RDF::LDF implements a basic Linked Data Fragment client.

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

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 ]);
    

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.

CONTRIBUTORS

Patrick Hochstenbach, patrick.hochstenbach at ugent.be

Gregory Todd Williams, greg@evilfunhouse.com

Jacob Voss, voss@gbv.de

COPYRIGHT AND LICENSE

This software is copyright (c) 2015 by Patrick Hochstenbach.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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