+zebra_sort_index_t zebra_sort_open(BFiles bfs, int write_flag, int sort_type);
+void zebra_sort_close(zebra_sort_index_t si);
+int zebra_sort_type(zebra_sort_index_t si, int type);
+void zebra_sort_sysno(zebra_sort_index_t si, zint sysno);
+void zebra_sort_add(zebra_sort_index_t si, const char *buf, int len);
+void zebra_sort_delete(zebra_sort_index_t si);
+void zebra_sort_read(zebra_sort_index_t si, char *buf);
+
+YAZ_END_CDECL