Declare namespaces: Raptor RDF Syntax Library Manual

+Declare namespaces

Raptor can use namespace prefix/URIs to abbreviate syntax +in some syntaxes such as Turtle or any XML syntax including RDF/XML, +RSS1.0 and Atom 1.0. These are declared +with raptor_serializer_set_namespace() +using a prefix and URI argument pair like this: +

+  const unsigned char* prefix = "ex";
+  raptor_uri* uri = raptor_new_uri(world, "http://example.org");
+
+  raptor_serializer_set_namespace(rdf_serializer, prefix, uri);
+

or +raptor_serializer_set_namespace_from_namespace() +from an existing namespace. This can be useful when connected up the +the namespace declarations that are generated from a parser via a +namespace handler set with +raptor_parser_set_namespace_handler() +

+like this: +

+  static void
+  relay_namespaces(void* user_data, raptor_namespace *nspace)
+  {
+    raptor_serializer_set_namespace_from_namespace(rdf_serializer, nspace);
+  }
+
+  ...
+
+  rdf_parser = raptor_new_parser(world, syntax_name);
+  raptor_parser_set_namespace_handler(rdf_parser, rdf_serializer, relay_namespaces);
+