NAME

       RDF::Trine - An RDF Framework for Perl

VERSION

       This document describes RDF::Trine version 1.019

SYNOPSIS

         use RDF::Trine;

         my $store = RDF::Trine::Store::Memory->new();
         my $model = RDF::Trine::Model->new($store);

         # parse some web data into the model, and print the count of resulting RDF statements
         RDF::Trine::Parser->parse_url_into_model( 'http://kasei.us/about/foaf.xrdf', $model );
         print $model->size . " RDF statements parsed\n";

         # Create a namespace object for the foaf vocabulary
         my $foaf = RDF::Trine::Namespace->new( 'http://xmlns.com/foaf/0.1/' );

         # Create a node object for the FOAF name property
         my $pred = $foaf->name;
         # alternatively:
         # my $pred = RDF::Trine::Node::Resource->new('http://xmlns.com/foaf/0.1/name');

         # Create an iterator for all the statements in the model with foaf:name as the predicate
         my $iter = $model->get_statements(undef, $pred, undef);

         # Now print the results
         print "Names of things:\n";
         while (my $st = $iter->next) {
           my $s = $st->subject;
           my $name = $st->object;

           # $s and $name have string overloading, so will print correctly
           print "The name of $s is $name\n";
         }

DESCRIPTION

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

       •   RDF::Trine::Model - RDF model providing access to a triple store. This module would
           typically be used to access an existing store by a developer looking to "Just get
           stuff done."

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

       •   RDF::Trine::Store::Memory - An in-memory, non-persistant triple store. Typically used
           for temporary data.

       •   RDF::Trine::Store::DBI - A triple store for MySQL, PostgreSQL, and SQLite, based on
           the relational schema used by Redland. Typically used to for large, persistent data.

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

       •   RDF::Trine::Namespace - A convenience class for easily constructing
           RDF::Trine::Node::Resource 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.

       "default_useragent ( [ $ua ] )"
           Returns the LWP::UserAgent object used by default for any operation requiring network
           requests. Ordinarily, the calling code will obtain the default user agent, and clone
           it before further configuring it for a specific request, thus leaving the default
           object untouched.

           If $ua is passed as an argument, sets the global default user agent to this object.

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.