Example 4. rdfcat.c: Read any RDF syntax and serialize to RDF/XML (Abbreviated)
#include <stdio.h>
#include <raptor2.h>
/* rdfcat.c: parse any RDF syntax and serialize to RDF/XML-Abbrev */
static raptor_serializer* rdf_serializer;
static void
serialize_triple(void* user_data, raptor_statement* triple)
{
raptor_serializer_serialize_statement(rdf_serializer, triple);
}
static void
declare_namespace(void* user_data, raptor_namespace *nspace)
{
raptor_serializer_set_namespace_from_namespace(rdf_serializer, nspace);
}
int
main(int argc, char *argv[])
{
raptor_world *world = NULL;
raptor_parser* rdf_parser = NULL;
unsigned char *uri_string;
raptor_uri *uri, *base_uri;
world = raptor_new_world();
uri_string = raptor_uri_filename_to_uri_string(argv[1]);
uri = raptor_new_uri(world, uri_string);
base_uri = raptor_uri_copy(uri);
/* Ask raptor to work out which parser to use */
rdf_parser = raptor_new_parser(world, "guess");
raptor_parser_set_statement_handler(rdf_parser, NULL, serialize_triple);
raptor_parser_set_namespace_handler(rdf_parser, NULL, declare_namespace);
rdf_serializer = raptor_new_serializer(world, "rdfxml-abbrev");
raptor_serializer_start_to_file_handle(rdf_serializer, base_uri, stdout);
raptor_parser_parse_file(rdf_parser, uri, base_uri);
raptor_serializer_serialize_end(rdf_serializer);
raptor_free_serializer(rdf_serializer);
raptor_free_parser(rdf_parser);
raptor_free_uri(base_uri);
raptor_free_uri(uri);
raptor_free_memory(uri_string);
raptor_free_world(world);
return 0;
}
Compile it like this:
$ gcc -o rdfcat rdfcat.c `pkg-config raptor2 --cflags --libs`
and run it on an RDF file as:
$ ./rdfcat raptor.rdf
<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://usefulinc.com/ns/doap#">
<rdf:Description rdf:about="">
<foaf:maker>
<foaf:Person>
<foaf:name>Dave Beckett</foaf:name>
...