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

       Gregory Todd Williams  "<gwilliams@cpan.org>"

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

       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 v5.38.2                                       2024-01-13                             RDF::Trine::Graph(3pm)

       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.

       "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.

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

         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");

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