NAME

Catmandu::Exporter::RDF - serialize RDF data

VERSION

version 0.15

SYNOPSIS

use Catmandu::Exporter::RDF;

my $exporter = Catmandu::Exporter::RDF->new(
    file => 'export.rdf',
    type => 'XML',
    fix  => 'rdf.fix'
);

$exporter->add( $aref ); # pass RDF data in aREF encoding

$exporter->commit;

METHODS

new(file => $file, type => $type, %options)

Create a new Catmandu RDF exporter which serializes into a file or to STDOUT.

A serialization form can be set with option type. The option type must refer to a subclass name of RDF::Trine::Serializer, for instance Turtle for RDF/Turtle with RDF::Trine::Serializer::Turtle. The first letter is transformed uppercase, so format => 'turtle' will work as well. In addition there are aliases ttl for Turtle, n3 for Notation3, xml and XML for RDFXML, json for RDFJSON.

The option fix is supported as derived from Catmandu::Fixable. For every add or for every item in add_many the given fixes will be applied first.

The option ns can refer to an instance of or to a constructor argument of RDF::NS. Use a fixed date, such as "20130816" to make sure your URI namespace prefixes are stable.

add( ... )

RDF data is added given in another RDF Encoding Form (aREF) as implemented with RDF::aREF and defined at http://github.com/gbv/aref.

count

Returns the number of times add has been called. In contrast to other Catmandu exporters, this does not reflect the number of exporter records because RDF data is always merged to one RDF graph.

uri( $uri )

Expand and abbreviated with RDF::NS. For instance "dc:title" is expanded to "http://purl.org/dc/elements/1.1/title".

SEE ALSO

Catmandu::Exporter, RDF::Trine::Serializer

AUTHOR

Jakob Voß

COPYRIGHT AND LICENSE

This software is copyright (c) 2014 by Jakob Voß.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.