1RDF::Trine::Graph(3)  User Contributed Perl Documentation RDF::Trine::Graph(3)
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NAME

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

9       This document describes RDF::Trine::Graph version 1.019
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SYNOPSIS

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

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

25       "new ( $model )"
26       "new ( $iterator )"
27           Returns a new graph from the given RDF::Trine::Model or
28           RDF::Trine::Iterator::Graph object.
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30       "equals ( $graph )"
31           Returns true if the invocant and $graph represent two equal RDF
32           graphs (e.g.  there exists a bijection between the RDF statements
33           of the invocant and $graph).
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35       "is_subgraph_of ( $graph )"
36           Returns true if the invocant is a subgraph of $graph. (i.e. there
37           exists an injection of RDF statements from the invocant to $graph.)
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39       "injection_map ( $graph )"
40           If the invocant is a subgraph of $graph, returns a mapping of blank
41           node identifiers from the invocant graph to $graph as a hashref.
42           Otherwise returns false. The solution is not always unique; where
43           there exist multiple solutions, the solution returned is arbitrary.
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45       "split_blank_statements"
46           Returns two array refs, containing triples with blank nodes and
47           triples without any blank nodes, respectively.
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49       "get_statements"
50           Returns a RDF::Trine::Iterator::Graph object for the statements in
51           this graph.
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53       "error"
54           Returns an error string explaining the last failed "equal" call.
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BUGS

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

61       Gregory Todd Williams  "<gwilliams@cpan.org>"
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64       Copyright (c) 2006-2012 Gregory Todd Williams. This program is free
65       software; you can redistribute it and/or modify it under the same terms
66       as Perl itself.
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70perl v5.30.1                      2020-01-30              RDF::Trine::Graph(3)
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