int send_initRequest(char* pRefId=NULL);
int send_searchRequest(Yaz_Z_Query *query, char* pResultSetId = NULL, char* pRefId = NULL);
int send_presentRequest(int start, int number, char* pResultSetId = NULL, char* pRefId = NULL);
int send_initRequest(char* pRefId=NULL);
int send_searchRequest(Yaz_Z_Query *query, char* pResultSetId = NULL, char* pRefId = NULL);
int send_presentRequest(int start, int number, char* pResultSetId = NULL, char* pRefId = NULL);