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>"

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.

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