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.IX Title "RDF::Query::Federate 3pm"
.TH RDF::Query::Federate 3pm "2017-01-04" "perl v5.24.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
RDF::Query::Federate \- A subclass of RDF::Query for efficient federated query execution.
.SH "VERSION"
.IX Header "VERSION"
This document describes RDF::Query::Federate version 2.918.
.SH "STATUS"
.IX Header "STATUS"
This module's \s-1API\s0 and functionality should be considered deprecated.
If you need functionality that this module provides,
please get in touch <http://www.perlrdf.org/>.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 4
\& my $service = RDF::Query::ServiceDescription\->new( $url );
\& my $query = new RDF::Query::Federate ( $sparql );
\& $query\->add_service( $service );
\& my $stream = $query\->execute();
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&...
.SH "METHODS"
.IX Header "METHODS"
.ie n .IP """new ( $query, \e%options )""" 4
.el .IP "\f(CWnew ( $query, \e%options )\fR" 4
.IX Item "new ( $query, %options )"
.PD 0
.ie n .IP """new ( $query, $base_uri, $languri, $lang )""" 4
.el .IP "\f(CWnew ( $query, $base_uri, $languri, $lang )\fR" 4
.IX Item "new ( $query, $base_uri, $languri, $lang )"
.PD
Returns a new RDF::Query::Federate object for the specified \f(CW$query\fR.
The query language defaults to \s-1SPARQLP,\s0 but may be set specifically by
specifying either \f(CW$languri\fR or \f(CW$lang\fR, whose acceptable values are:
.Sp
.Vb 1
\&  $lang: \*(Aqrdql\*(Aq, \*(Aqsparql11\*(Aq, or \*(Aqsparql\*(Aq
\&
\&  $languri: \*(Aqhttp://www.w3.org/TR/rdf\-sparql\-query/\*(Aq, or \*(Aqhttp://jena.hpl.hp.com/2003/07/query/RDQL\*(Aq
.Ve
.ie n .IP """add_service ( $service_description )""" 4
.el .IP "\f(CWadd_service ( $service_description )\fR" 4
.IX Item "add_service ( $service_description )"
Adds the service described by \f(CW$service_description\fR to the query's list
of data sources.
.ie n .IP """services""" 4
.el .IP "\f(CWservices\fR" 4
.IX Item "services"
.PD 0
.ie n .IP """algebra_fixup ( $algebra, $bridge, $base_uri, $ns )""" 4
.el .IP "\f(CWalgebra_fixup ( $algebra, $bridge, $base_uri, $ns )\fR" 4
.IX Item "algebra_fixup ( $algebra, $bridge, $base_uri, $ns )"
.PD
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.
.SH "AUTHOR"
.IX Header "AUTHOR"
.Vb 1
\& Gregory Todd Williams <gwilliams@cpan.org>
.Ve