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rdf::query::servicedescription(3pm) [debian man page]

RDF::Query::ServiceDescription(3pm)			User Contributed Perl Documentation		       RDF::Query::ServiceDescription(3pm)

NAME

       RDF::Query::ServiceDescription - Class for describing federated query data sources.

VERSION

       This document describes RDF::Query::ServiceDescription version 2.908.

METHODS

       "new ( $service_uri, %data )"
       "new_from_uri ( $url )"
	   Creates a new service description object using the DARQ-style service description data located at $url.

       "new_with_model ( $model )"
	   Creates a new service description object using the DARQ-style service description data loaded in the supplied $model object.

       "url"
	   Returns the endpoint URL of the service.

       "size"
	   Returns the number of triples the service claims to have.

       "label"
	   Returns the label of the service.

       "definitive"
	   Returns true if the endpoint claims to have definitive information.

       "capabilities"
	   Returns an ARRAY reference of capabilities (as HASH references) of the service.  Each capability will contain information on size,
	   selectivity, any subject-object filter, and required predicate, with the following classes:

	     $capability->{object_selectivity} # RDF::Trine::Node::Literal xsd:double
	     $capability->{sofilter} # RDF::Query::Expression
	     $capability->{size} # RDF::Trine::Node::Literal xsd:integer
	     $capability->{pred} # RDF::Trine::Node::Resource

       "patterns"
	   Returns an ARRAY reference of RDF::Query::Algebra::BasicGraphPattern objects representing common patterns used by the endpoint.

       "computed_statement_generator"
	   Returns a closure appropriate for passing to "RDF::Query->add_computed_statement_generator" to generate statement iterators for the
	   remote service.

	   This closure takes "($query, $bridge, \%bound, $subj, $pred, $obj [, $context ] )" as arguments and returns either "undef" if no
	   statements can be generated given the arguments, or a "RDF::Trine::Iterator::Graph" iterator containing statements matching "$subj,
	   $pred, $obj [, $context ]".

       "answers_triple_pattern ( $triple )"
	   Returns true if the service described by this object can answer queries comprised of the supplied triple pattern.

AUTHOR

	Gregory Todd Williams <gwilliams@cpan.org>

perl v5.14.2							    2012-01-31				       RDF::Query::ServiceDescription(3pm)

Check Out this Related Man Page

RDF::Trine(3pm) 					User Contributed Perl Documentation					   RDF::Trine(3pm)

NAME

       RDF::Trine - An RDF Framework for Perl

VERSION

       This document describes RDF::Trine version 1.000

SYNOPSIS

	 use RDF::Trine;

DESCRIPTION

       RDF::Trine provides an RDF framework with an emphasis on extensibility, API stability, and the presence of a test suite. The package
       consists of several components:

       o   RDF::Trine::Model - RDF model providing access to a triple store.

       o   RDF::Trine::Parser - RDF parsers for various serialization formats including RDF/XML, Turtle, RDFa, and RDF/JSON.

       o   RDF::Trine::Store::Memory - An in-memory, non-persistant triple store.

       o   RDF::Trine::Store::DBI - A triple store for MySQL and SQLite, based on the Redland schema.

       o   RDF::Trine::Iterator - Iterator classes for variable bindings and RDF statements, used by RDF::Trine::Store, RDF::Trine::Model, and
	   RDF::Query.

       o   RDF::Trine::Namespace - A convenience class for easily constructing RDF node objects from URI namespaces.

FUNCTIONS

       "iri ( $iri )"
	   Returns a RDF::Trine::Node::Resource object with the given IRI value.

       "blank ( $id )"
	   Returns a RDF::Trine::Node::Blank object with the given identifier.

       "literal ( $value, $lang, $dt )"
	   Returns a RDF::Trine::Node::Literal object with the given value and optional language/datatype.

       "variable ( $name )"
	   Returns a RDF::Trine::Node::Variable object with the given variable name.

       "statement ( @nodes )"
	   Returns a RDF::Trine::Statement object with the supplied node objects.

       "store ( $config )"
	   Returns a RDF::Trine::Store object based on the supplied configuration string.  See RDF::Trine::Store for more information on store
	   configuration strings.

BUGS

       Please report any bugs or feature requests to through the GitHub web interface at <https://github.com/kasei/perlrdf/issues>.

SEE ALSO

       <http://www.perlrdf.org/>

AUTHOR

       Gregory Todd Williams  "<gwilliams@cpan.org>"

COPYRIGHT

       Copyright (c) 2006-2012 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms
       as Perl itself.

perl v5.14.2							    2012-06-29							   RDF::Trine(3pm)
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