NAME

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

VERSION

       This document describes RDF::Query::Federate version 2.910.

STATUS

       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/>.

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>