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.IX Title "RDF::Trine::Graph 3pm"
.TH RDF::Trine::Graph 3pm 2024-01-13 "perl v5.38.2" "User Contributed Perl Documentation"
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.SH NAME
RDF::Trine::Graph \- Materialized RDF Graphs for testing isomorphism
.SH VERSION
.IX Header "VERSION"
This document describes RDF::Trine::Graph version 1.019
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 4
\&  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");
.Ve
.SH DESCRIPTION
.IX Header "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.
.SH METHODS
.IX Header "METHODS"
.ie n .IP """new ( $model )""" 4
.el .IP "\f(CWnew ( $model )\fR" 4
.IX Item "new ( $model )"
.PD 0
.ie n .IP """new ( $iterator )""" 4
.el .IP "\f(CWnew ( $iterator )\fR" 4
.IX Item "new ( $iterator )"
.PD
Returns a new graph from the given RDF::Trine::Model or RDF::Trine::Iterator::Graph object.
.ie n .IP """equals ( $graph )""" 4
.el .IP "\f(CWequals ( $graph )\fR" 4
.IX Item "equals ( $graph )"
Returns true if the invocant and \f(CW$graph\fR represent two equal RDF graphs (e.g.
there exists a bijection between the RDF statements of the invocant and \f(CW$graph\fR).
.ie n .IP """is_subgraph_of ( $graph )""" 4
.el .IP "\f(CWis_subgraph_of ( $graph )\fR" 4
.IX Item "is_subgraph_of ( $graph )"
Returns true if the invocant is a subgraph of \f(CW$graph\fR. (i.e. there exists an
injection of RDF statements from the invocant to \f(CW$graph\fR.)
.ie n .IP """injection_map ( $graph )""" 4
.el .IP "\f(CWinjection_map ( $graph )\fR" 4
.IX Item "injection_map ( $graph )"
If the invocant is a subgraph of \f(CW$graph\fR, returns a mapping of blank node
identifiers from the invocant graph to \f(CW$graph\fR as a hashref. Otherwise
returns false. The solution is not always unique; where there exist multiple
solutions, the solution returned is arbitrary.
.ie n .IP """split_blank_statements""" 4
.el .IP \f(CWsplit_blank_statements\fR 4
.IX Item "split_blank_statements"
Returns two array refs, containing triples with blank nodes and triples without
any blank nodes, respectively.
.ie n .IP """get_statements""" 4
.el .IP \f(CWget_statements\fR 4
.IX Item "get_statements"
Returns a RDF::Trine::Iterator::Graph object for the statements in this graph.
.ie n .IP """error""" 4
.el .IP \f(CWerror\fR 4
.IX Item "error"
Returns an error string explaining the last failed \f(CW\*(C`equal\*(C'\fR call.
.SH BUGS
.IX Header "BUGS"
Please report any bugs or feature requests to through the GitHub web interface
at <https://github.com/kasei/perlrdf/issues>.
.SH AUTHOR
.IX Header "AUTHOR"
Gregory Todd Williams  \f(CW\*(C`<gwilliams@cpan.org>\*(C'\fR
.SH COPYRIGHT
.IX Header "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.