+/** \brief get element set name from RecordComposition
+ \param comp record composition
+ \returns element set name or NULL if no element set name was given
+*/
+YAZ_EXPORT
+const char *yaz_get_esn(Z_RecordComposition *comp);
+
+/** \brief set element set name in RecordComposition struct
+ \param comp_p record composition ptr
+ \param esn element set name string
+ \param nmem memory for result composition
+*/
+YAZ_EXPORT
+void yaz_set_esn(Z_RecordComposition **comp_p, const char *esn, NMEM nmem);
+
+/** \brief returns diagnostics from an init response
+ \param no number of diagnotic entry to get. 0=first, 1=second, ..
+ \param initrs InitResponse structure
+ \retuns diag entry or 0 (NULL) if none could be found
+*/
+YAZ_EXPORT
+Z_DefaultDiagFormat *yaz_decode_init_diag(int no, Z_InitResponse *initrs);
+