Gregory Todd Williams > RDF-Trine-1.011 > RDF::Trine::Graph

Download:
RDF-Trine-1.011.tar.gz

Dependencies

Annotate this POD

Website

View/Report Bugs
Module Version: 1.011   Source   Latest Release: RDF-Trine-1.011_01

NAME ^

RDF::Trine::Graph - Materialized RDF Graphs for testing isomorphism

VERSION ^

This document describes RDF::Trine::Graph version 1.011

SYNOPSIS ^

  use RDF::Trine::Graph;
  my $a = RDF::Trine::Graph->new( $model_a );
  my $b = RDF::Trine::Graph->new( $model_b );
  print "graphs are " . ($a->equals( $b ) ? "the same" : "different");

DESCRIPTION ^

RDF::Trine::Graph provdes a mechanism for testing graph isomorphism based on graph triples from either a RDF::Trine::Model or a RDF::Trine::Iterator. Isomorphism testing requires materializing all of a graph's triples in memory, and so should be used carefully in situations with large graphs.

METHODS ^

new ( $model )
new ( $iterator )

Returns a new graph from the given RDF::Trine::Model or RDF::Trine::Iterator::Graph object.

equals ( $graph )

Returns true if the invocant and $graph represent two equal RDF graphs (e.g. there exists a bijection between the RDF statements of the invocant and $graph).

is_subgraph_of ( $graph )

Returns true if the invocant is a subgraph of $graph. (i.e. there exists an injection of RDF statements from the invocant to $graph.)

injection_map ( $graph )

If the invocant is a subgraph of $graph, returns a mapping of blank node identifiers from the invocant graph to $graph as a hashref. Otherwise returns false. The solution is not always unique; where there exist multiple solutions, the solution returned is arbitrary.

split_blank_statements

Returns two array refs, containing triples with blank nodes and triples without any blank nodes, respectively.

get_statements

Returns a RDF::Trine::Iterator::Graph object for the statements in this graph.

error

Returns an error string explaining the last failed equal call.

BUGS ^

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

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.

syntax highlighting: