1RDF::Trine::Serializer:U:sNeTrriCpolnetsr:iR:bDCuFat:ne:odTnriPicenarell:(:3DS)oecruimaelnitzaetri:o:nNTriples::Canonical(3)
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NAME

6       RDF::Trine::Serializer::NTriples::Canonical - Canonical representation
7       of an RDF model
8

VERSION

10       This document describes RDF::Trine::Serializer::NTriples::Canonical
11       version 1.019
12

SYNOPSIS

14         use RDF::Trine::Serializer::NTriples::Canonical;
15         my $serializer = RDF::Trine::Serializer::NTriples->new( onfail=>'truncate' );
16         $serializer->serialize_model_to_file(FH, $model);
17

DESCRIPTION

19       This module produces a canonical string representation of an RDF graph.
20       If the graph contains blank nodes, sometimes there is no canonical
21       representation that can be produced. The 'onfail' option allows you to
22       decide what is done in those circumstances:
23
24       ·       truncate - drop problematic triples and only serialize a
25               subgraph.
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27       ·       append - append problematic triples to the end of graph. The
28               result will be non-canonical. This is the default behaviour.
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30       ·       space - As with 'append', but leave a blank line separating the
31               canonical and non-canonical portions of the graph.
32
33       ·       die - cause a fatal error.
34
35       Other than the 'onfail' option, this package has exactly the same
36       interface as RDF::Trine::Serializer::NTriples, providing
37       "serialize_model_to_file" and "serialize_model_to_string" methods.
38
39       This package will be considerably slower than the non-canonicalising
40       serializer though, so should only be used for small to medium-sized
41       graphs, and only when you need canonicalisation (e.g. for side-by-side
42       comparison of two graphs to check they're isomorphic; or creating a
43       canonical representation for digital signing).
44

METHODS

46       Beyond the methods documented below, this class inherits methods from
47       the RDF::Trine::Serializer::NTriples class.
48
49       "new ( [ onfail => $rule ] )"
50           Returns a new Canonical N-Triples serializer object. If specified,
51           the value of the 'onfail' argument dictates the handling of blank
52           nodes with no canonical representation. The allowable rule values
53           are 'truncate', 'append', 'space', and 'die', and their respective
54           behaviour is described in "DESCRIPTION" above.
55
56       "serialize_model_to_file ( $fh, $model )"
57           Serializes the $model to canonical NTriples, printing the results
58           to the supplied filehandle "<$fh">.
59
60       "serialize_model_to_string ( $model )"
61           Serializes the $model to canonical NTriples, returning the result
62           as a string.
63

BUGS

65       Please report any bugs or feature requests to through the GitHub web
66       interface at <https://github.com/kasei/perlrdf/issues>.
67

SEE ALSO

69       Signing RDF Graphs, Jeremey J Carroll, Digital Media Systems
70       Laboratory, HB Laboratories Bristol.  HPL-2003-142, 23 July 2003.
71       <http://www.hpl.hp.com/techreports/2003/HPL-2003-142.pdf>.
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73       RDF::Trine, RDF::Trine::Serializer::NTriples.
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75       <http://www.perlrdf.org/>.
76

AUTHOR

78       Toby Inkster, <tobyink@cpan.org>
79

81       Copyright (c) 2010 Toby Inkster
82
83       This library is free software; you can redistribute it and/or modify it
84       under the same terms as Perl itself, either Perl version 5.8.1 or, at
85       your option, any later version of Perl 5 you may have available.
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89perl v5.28.1                    RD2F0:1:8T-r0i1n-e0:5:Serializer::NTriples::Canonical(3)
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