NAME

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

VERSION

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

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>"