Hi, On Wed, Dec 3, 2008 at 9:55 PM, Marius Erdt <[EMAIL PROTECTED]> wrote: > predicate = librdf_new_node_from_uri_string(world, (const > unsigned char*) ":type" ),
You probably want the full uri "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"; here instead of just ":type". librdf_new_node_from_uri_string() knows nothing about uri prefixes. librdf_new_uri_from_uri_local_name() is the function you would use for prefixed uris but even then you need the librdf_uri object for the prefix part. The rdf:type uri is also pre-defined by the rdf_concepts module. You can access it with librdf_get_concept_uri_by_index(world, LIBRDF_MS_type). When serializing, you can declare any namespace prefixes you want in the serializer object using librdf_serializer_set_namespace(). For most serializers including rdfxml, the "rdf" namespace prefix is already declared to "http://www.w3.org/1999/02/22-rdf-syntax-ns#";. For undeclared namespaces, the rdfxml serializer will use namespaces ns0, ns1, ns2... for turning predicate uris into XML tag names. Lauri _______________________________________________ redland-dev mailing list [email protected] http://lists.librdf.org/mailman/listinfo/redland-dev
