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.