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)