NAME RDF::Trine::Serializer::NTriples::Canonical - Canonical representation of an RDF model SYNOPSIS use RDF::Trine::Serializer::NTriples::Canonical; my $serializer = RDF::Trine::Serializer::NTriples->new( onfail=>'truncate' ); $serializer->serialize_model_to_file(FH, $model); DESCRIPTION This module produces a canonical string representation of an RDF graph. If the graph contains blank nodes, sometimes there is no canonical representation that can be produced. The 'onfail' option allows you to decide what is done in those circumstances: * truncate - drop problematic triples and only serialize a subgraph. * append - append problematic triples to the end of graph. The result will be non-canonical. This is the default behaviour. * space - As with 'append', but leave a blank line separating the canonical and non-canonical portions of the graph. * die - cause a fatal error. Other than the 'onfail' option, this package has exactly the same interface as RDF::Trine::Serializer::NTriples, providing "serialize_model_to_file" and "serialize_model_to_string" methods. This package will be considerably slower than the non-canonicalising serializer though, so should only be used for small to medium-sized graphs, and only when you need canonicalisation (e.g. for side-by-side comparison of two graphs to check they're isomorphic; or creating a canonical representation for digital signing). BUGS Please report any bugs to <http://rt.cpan.org/>. SEE ALSO *Signing RDF Graphs*, Jeremey J Carroll, Digital Media Systems Laboratory, HB Laboratories Bristol. HPL-2003-142, 23 July 2003. <http://www.hpl.hp.com/techreports/2003/HPL-2003-142.pdf>. RDF::Trine, RDF::Trine::Serializer::NTriples. <http://www.perlrdf.org/>. AUTHOR Toby Inkster, <email@example.com> COPYRIGHT AND LICENSE Copyright (C) 2009 by Toby Inkster This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.1 or, at your option, any later version of Perl 5 you may have available.