RDF::Query::Federate(3pm) User Contributed Perl Documentation RDF::Query::Federate(3pm)
NAME
RDF::Query::Federate - A subclass of RDF::Query for efficient federated query execution.
VERSION
This document describes RDF::Query::Federate version 2.908.
SYNOPSIS
my $service = RDF::Query::ServiceDescription->new( $url );
my $query = new RDF::Query::Federate ( $sparql );
$query->add_service( $service );
my $stream = $query->execute();
DESCRIPTION
...
METHODS
"new ( $query, \%options )"
"new ( $query, $base_uri, $languri, $lang )"
Returns a new RDF::Query::Federate object for the specified $query. The query language defaults to SPARQLP, but may be set
specifically by specifying either $languri or $lang, whose acceptable values are:
$lang: 'rdql', 'sparql11', or 'sparql'
$languri: 'http://www.w3.org/TR/rdf-sparql-query/', or 'http://jena.hpl.hp.com/2003/07/query/RDQL'
"add_service ( $service_description )"
Adds the service described by $service_description to the query's list of data sources.
"services"
"algebra_fixup ( $algebra, $bridge, $base_uri, $ns )"
Called in the fixup method of ::Algebra classes, returns either an optimized ::Algebra object ready for execution, or undef (in which
case it will be prepared for execution by the ::Algebra::* class itself.
AUTHOR
Gregory Todd Williams <gwilliams@cpan.org>
perl v5.14.2 2012-01-31 RDF::Query::Federate(3pm)
