librdf_node* librdf_new_node_from_normalised_uri_string (librdf_world * world, const char * uri_string, librdf_uri * source_uri, librdf_uri * base_uri);
librdf_node* librdf_new_node_from_normalised_uri_string
redland world object
string representing a URI
source URI
base URI
a new librdf_node object or NULL on failure