RDF::Trine::Serializer::NTriples::Canonical - Canonical representation of
an RDF model
my $serializer = RDF::Trine::Serializer::NTriples->new( onfail=>'truncate' );
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).
Please report any bugs to <http://rt.cpan.org/>.
*Signing RDF Graphs*, Jeremey J Carroll, Digital Media Systems Laboratory,
HB Laboratories Bristol. HPL-2003-142, 23 July 2003.
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.