NAME

       Catmandu::Exporter::RDF - serialize RDF data

SYNOPSIS

       In Perl code:

           use Catmandu -all;

           my $exporter = exporter('RDF',
               file => 'export.rdf',
               type => 'XML',
               fix  => 'rdf.fix'
           );

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

           $exporter->commit;

DESCRIPTION

       This Catmandu::Exporter exports RDF data in different RDF serializations.

CONFIGURATION

       file
       fh
       encoding
       fix Default configuration options of Catmandu::Exporter.  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.

       type
           A serialization form can be set with option "type" with default value "NTriples". The
           option must refer to a subclass 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".

           When the option "type" is set to 'NTriples' the export can be streamed in all other
           cases the results are exported in bulk after "commit()".

       ns  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.

METHODS

       See also Catmandu::Exporter.

   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

       Serialization is based on RDF::Trine::Serializer.