SIMPLE SOLUTIONS

RDF::TRINE::STORE::LDF(3PM) - Linux man page online | Library functions

RDF Store proxy for a Linked Data Fragment endpoint.

Chapter
2017-10-01
RDF::Trine::Store::LDF(3pm) User Contributed Perl Documentation RDF::Trine::Store::LDF(3pm)

NAME

RDF::Trine::Store::LDF - RDF Store proxy for a Linked Data Fragment endpoint

SYNOPSIS

use RDF::Trine::Store::LDF; use RDF::Trine::Store; 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 query the store with SPAQRL use RDF::Query; my $model = RDF::Trine::Model->new($store); my $rdf_query = RDF::Query->new(<<EOF); . . SPARQL . . EOF my $iter = $rdf_query->execute($model); while (my $s = $iter->next) { # $s is a RDF::Trine::VariableBinding print $s->value . "\n"; }

DESCRIPTION

RDF::Trine::Store::LDF provides a RDF::Trine::Store API to interact with a remote Linked Data Fragment endpoint. For details see: <http://linkeddatafragments.org/>.

METHODS

Beyond the methods documented below, this class inherits methods from the RDF::Trine::Store class. new({ url => url }) Returns a new RDF::Trine::Store object that will act as a proxy for the Linked Data Fragment endpoint accessible via the supplied $url. Expertimental: more than one url as an ARRAY reference can be provided for an federated query over many LDF endpoints. new_with_config( $hashref ) Returns a new RDF::Trine::Store object configured by a hashref with the url as required key. get_statements( $subject, $predicate, $object ) Returns a stream object of all statements matching the specified subject, predicate and objects. Any of the arguments may be undef to match any value. get_pattern( $bgp ) Returns an iterator object of all bindings matching the specified graph pattern. get_contexts Not supported. add_statement ( $statement [, $context] ) Not supported. remove_statement ( $statement [, $context]) Not supported. remove_statements ( $subject, $predicate, $object [, $context]) Not supported. count_statements ( $subject, $predicate, $object ) Returns a count of all the statements matching the specified subject, predicate and object. Any of the arguments may be undef to match any value. size Returns the number of statements in the store. supports ( [ $feature ] ) Not supported.

AUTHOR

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

CONTRIBUTORS

Gregory Todd Williams, "@evilfunhouse.com"

LICENSE

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License. See <http://dev.perl.org/licenses/> for more information.
perl v5.26.1 2017-10-01 RDF::Trine::Store::LDF(3pm)
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