rdf::closure::engine(3pm) [debian man page]
RDF::Closure::Engine(3pm) User Contributed Perl Documentation RDF::Closure::Engine(3pm) NAME
RDF::Closure::Engine - an engine for inferring triples DESCRIPTION
Constructor o "new($regime, $model, @arguments)" Instantiates an inference engine. This: RDF::Closure::Engine->new('RDFS', $model, @args); is just a shortcut for: RDF::Closure::Engine::RDFS->new($model, @args); Though in the former, 'RDFS' is treated case-insensitively. $model must be an RDF::Trine::Model which the engine will read its input from and write its output to. Methods o "entailment_regime" Returns a URI string identifying the type of inference implemented by the engine, or undef. o "graph" Returns the RDF::Trine::Model the engine is operating on. o "closure( [ $is_subsequent ] )" Adds any new triples to the graph that can be inferred. If $is_subsequent is true, then skips axioms. o "errors" Returns a list of consistency violations found so far. o "reset" Removes all inferred triples from the graph. Class Method o "engines" Return a list of engines installed, e.g. 'RDF::Closure::Engine::RDFS'. SEE ALSO
RDF::Closure, RDF::Closure::Engine::RDFS, RDF::Closure::Engine::OWL2RL, RDF::Closure::Engine::OWL2Plus. <http://www.perlrdf.org/>. AUTHOR
Toby Inkster <tobyink@cpan.org>. COPYRIGHT
Copyright 2011-2012 Toby Inkster This library is free software; you can redistribute it and/or modify it under any of the following licences: o The Artistic License 1.0 <http://www.perlfoundation.org/artistic_license_1_0>. o The GNU General Public License Version 1 http://www.gnu.org/licenses/old-licenses/gpl-1.0.txt <http://www.gnu.org/licenses/old- licenses/gpl-1.0.txt>, or (at your option) any later version. o The W3C Software Notice and License http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231 <http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231>. o The Clarified Artistic License <http://www.ncftp.com/ncftp/doc/LICENSE.txt>. DISCLAIMER OF WARRANTIES
THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. perl v5.14.2 2012-06-28 RDF::Closure::Engine(3pm)
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RDF::Closure(3pm) User Contributed Perl Documentation RDF::Closure(3pm) NAME
RDF::Closure - pure Perl RDF inferencing SYNOPSIS
use RDF::Trine::Iterator qw[sgrep]; use RDF::Closure qw[iri mk_filter FLT_NONRDF FLT_BORING]; my $data = iri('http://bloggs.example.com/foaf.rdf'); my $foaf = iri('http://xmlns.com/foaf/0.1/index.rdf'); my $model = RDF::Trine::Model->temporary_model; my $p = 'RDF::Trine::Parser'; $p->parse_url_into_model($data->uri, $model, context => $data->uri); $p->parse_url_into_model($foaf->uri, $model, context => $foaf->uri); my $cl = RDF::Closure::Engine->new('rdfs', $model); $cl->closure; my $filter = mk_filter(FLT_NONRDF|FLT_BORING, [$foaf]); my $output = &sgrep($filter, $model->as_stream); print RDF::Trine::Serializer ->new('RDFXML') ->serialize_iterator_to_string($output); DESCRIPTION
This distribution is a pure Perl RDF inference engine designed as an add-in for RDF::Trine. It is largely a port of Ivan Herman's Python RDFClosure library, though there has been some restructuing, and there are a few extras thrown in. Where one of the Perl modules has a direct equivalent in Ivan's library, this is noted in the POD. Functions This package inherits from RDF::Trine and exports the same functions, plus: o "mk_filter($basic_filters, $ignore_contexts)" Creates a filter (coderef) suitable for use with "sgrep" from RDF::Trine::Iterator. $basic_filters is an integer which can be assembled by bitwise-OR-ing the constants "FLT_NONRDF" and "FLT_BORING". $ignore_contexts is an arrayref of RDF::Trine::Node objects, each of which represents a context that should be filtered out. use RDF::Trine::Iterator qw[sgrep]; use RDF::Closure qw[iri mk_filter FLT_NONRDF FLT_BORING]; my $foaf = iri('http://xmlns.com/foaf/0.1/index.rdf'); my $filter = mk_filter(FLT_NONRDF|FLT_BORING, [$foaf]); my $remaining = &sgrep($filter, $model->as_stream); # $remaining is now an iterator which will return all triples # from $model except: those in the FOAF named graph, those which # are non-RDF (e.g. literal subject) and those which are boring. Which triples are boring? Any triple of the form { ?x owl:sameAs ?x .}, { ?x owl:equivalentProperty ?x .}, { ?x owl:equivalentClass ?x .}, { ?x rdfs:subPropertyOf ?x .} or { ?x rdfs:subClassOf ?x .} is boring (i.e. where these statements have the same term in subject and object position). Any triple where the subject, predicate and object nodes are all in the RDF, RDFS, OWL or XSD namespaces is boring. Other triples are not boring. For convenience, "RDF::Closure" also exports variables called $RDF, $RDFS, $OWL and $XSD which are RDF::Trine::Namespace objects. SEE ALSO
RDF::Closure::Engine, RDF::Closure::Model, RDF::Trine::Parser::OwlFn. RDF::Trine, RDF::Query. <http://www.perlrdf.org/>. http://www.ivan-herman.net/Misc/2008/owlrl/ <http://www.ivan-herman.net/Misc/2008/owlrl/>. AUTHOR
Toby Inkster <tobyink@cpan.org>. COPYRIGHT
Copyright 2011-2012 Toby Inkster This library is free software; you can redistribute it and/or modify it under any of the following licences: o The Artistic License 1.0 <http://www.perlfoundation.org/artistic_license_1_0>. o The GNU General Public License Version 1 http://www.gnu.org/licenses/old-licenses/gpl-1.0.txt <http://www.gnu.org/licenses/old- licenses/gpl-1.0.txt>, or (at your option) any later version. o The W3C Software Notice and License http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231 <http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231>. o The Clarified Artistic License <http://www.ncftp.com/ncftp/doc/LICENSE.txt>. DISCLAIMER OF WARRANTIES
THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. perl v5.14.2 2012-06-28 RDF::Closure(3pm)