librdf_node* librdf_model_get_source (librdf_model * model, librdf_node * arc, librdf_node * target);
librdf_node* librdf_model_get_source
librdf_model object
librdf_node arc
librdf_node target
Searches the model for arcs matching the given arc and target and returns one librdf_node object
a new librdf_node object or NULL on failure