RDF::TRINE(3PM) - Linux man page online | Library functions

An RDF Framework for Perl.

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


RDF::Trine - An RDF Framework for Perl


This document describes RDF::Trine version 1.019


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( '', $model ); print $model->size . " RDF statements parsed\n"; # Create a namespace object for the foaf vocabulary my $foaf = RDF::Trine::Namespace->new( '' ); # Create a node object for the FOAF name property my $pred = $foaf->name; # alternatively: # my $pred = RDF::Trine::Node::Resource->new(''); # 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"; }


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.


"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.


Please report any bugs or feature requests to through the GitHub web interface at <>.




Gregory Todd Williams "<>"
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 v5.26.1 2018-01-05 RDF::Trine(3pm)
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