#ifdef __cplusplus
extern "C" {
#endif

  S4EXPORT long S4FUNCTION a4indexVersion(DATA4 *); 
  S4EXPORT int  S4FUNCTION a4tagKeyLen(DATA4 *);
  S4EXPORT const char * S4FUNCTION a4tagKey(DATA4 *);
  S4EXPORT int  S4FUNCTION a4lockTest(DATA4 *);

#ifdef __cplusplus
}
#endif