NAME¶
Catmandu::Exporter::RDF - serialize RDF data
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;
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". 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".
- 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.