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RDF::Query::Federate(3) User Contributed Perl Documentation RDF::Query::Federate(3)

RDF::Query::Federate - A subclass of RDF::Query for efficient federated query execution.

This document describes RDF::Query::Federate version 2.918.

This module's API and functionality should be considered deprecated. If you need functionality that this module provides, please get in touch <http://www.perlrdf.org/>.

 my $service = RDF::Query::ServiceDescription->new( $url );
 my $query = new RDF::Query::Federate ( $sparql );
 $query->add_service( $service );
 my $stream = $query->execute();

...

"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.

 Gregory Todd Williams <gwilliams@cpan.org>
2017-01-04 perl v5.32.1

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