RDF::Simple::Serialiser - convert a list of triples to RDF
A simple RDF serialiser. Accepts an array of triples, returns a serialised RDF document.
my $ser = RDF::Simple::Serialiser->new( # OPTIONAL: Supply your own bNode id prefix: nodeid_prefix => 'a:', ); # OPTIONAL: Add your namespaces: $ser->addns( foaf => 'http://xmlns.com/foaf/0.1/', ); my $node1 = $ser->genid; my $node2 = $ser->genid; my @triples = ( ['http://example.com/url#', 'dc:creator', 'zool@example.com'], ['http://example.com/url#', 'foaf:Topic', '_id:1234'], ['_id:1234','http://www.w3.org/2003/01/geo/wgs84_pos#lat','51.334422'] [$node1, 'foaf:name', 'Jo Walsh'], [$node1, 'foaf:knows', $node2], [$node2, 'foaf:name', 'Robin Berjon'], [$node1, 'rdf:type', 'foaf:Person'], [$node2, 'rdf:type','http://xmlns.com/foaf/0.1/Person'] [$node2, 'foaf:url', \'http://server.com/NOT/an/rdf/uri.html'], ); my $rdf = $ser->serialise(@triples); ## Round-trip example: my $parser = RDF::Simple::Parser->new(); my $rdf = LWP::Simple::get('http://www.zooleika.org.uk/foaf.rdf'); my @triples = $parser->parse_rdf($rdf); my $new_rdf = $serialiser->serialise(@triples);
Accepts a 'bucket of triples' (an array of array references which are [subject, predicate, object] statements) and returns a serialised RDF document.
If 'rdf:type' is not provided for a subject, the generic node type 'rdf:Description' is used.
A synonym for serialise() for American users.
Use this method to add new namespaces to the RDF document. The RDF::Simple::NS module provides the following vocabularies by default (you can override them if you wish):
foaf => 'http://xmlns.com/foaf/0.1/', dc => 'http://purl.org/dc/elements/1.1/', rdfs => 'http://www.w3.org/2000/01/rdf-schema#', daml => 'http://www.w3.org/2001/10/daml+oil#', space => 'http://frot.org/space/0.1/', geo => 'http://www.w3.org/2003/01/geo/wgs84_pos#', rdf => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#', owl => 'http://www.w3.org/2002/07/owl#', ical => 'http://www.w3.org/2002/12/cal/ical#', dcterms => 'http://purl.org/dc/terms/', wiki => 'http://purl.org/rss/1.0/modules/wiki/', chefmoz => 'http://chefmoz.org/rdf/elements/1.0/',
generates a random identifier for use as a bNode (anonymous node) nodeID. if nodeid_prefix is set, the generated id uses the prefix, followed by 8 random numbers.
Does the heavy lifting of converting the "objects" to a string. Users of this module should call serialize(); Subclassers of this module will probably rewrite render().
Please report bugs via the RT web site http://rt.cpan.org/Ticket/Create.html?Queue=RDF-Simple
The original author was British, so this is a Serialiser. For American programmers, RDF::Simple::Serializer will work as an alias to the module, and serialize() does the same as serialise().
The distinction between a URI and a literal string in the "object" (third element) of each triple is made as follows: if the object is a reference, it is output as a literal; if the object "looks like" a URI (according to Regexp::Common::URI), it is output as a URI.
Thanks particularly to Tom Hukins, and also to Paul Mison, for providing patches.
Originally written by Jo Walsh (formerly <jo@london.pm.org>). Currently maintained by Martin Thurn <mthurn@cpan.org>.
This module is available under the same terms as perl itself.
To install RDF::Simple, copy and paste the appropriate command in to your terminal.
cpanm
cpanm RDF::Simple
CPAN shell
perl -MCPAN -e shell install RDF::Simple
For more information on module installation, please visit the detailed CPAN module installation guide.