+ * Revision 1.21 1999-07-14 10:59:26 adam
+ * Changed functions isc_getmethod, isams_getmethod.
+ * Improved fatal error handling (such as missing EXPLAIN schema).
+ *
+ * Revision 1.20 1999/07/06 12:28:04 adam
+ * Updated record index structure. Format includes version ID. Compression
+ * algorithm ID is stored for each record block.
+ *
+ * Revision 1.19 1999/05/26 07:49:13 adam
+ * C++ compilation.
+ *
+ * Revision 1.18 1999/05/15 14:36:38 adam
+ * Updated dictionary. Implemented "compression" of dictionary.
+ *
+ * Revision 1.17 1999/05/12 13:08:06 adam
+ * First version of ISAMS.
+ *
+ * Revision 1.16 1999/02/19 10:38:30 adam
+ * Implemented chdir-setting.
+ *
+ * Revision 1.15 1999/02/17 12:18:12 adam
+ * Fixed zebra_close so that a NULL pointer is ignored.
+ *
+ * Revision 1.14 1999/02/02 14:51:11 adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.13 1998/12/16 12:23:30 adam
+ * Added facility for database name mapping using resource mapdb.
+ *
+ * Revision 1.12 1998/11/16 10:18:10 adam
+ * Better error reporting for result sets.
+ *
+ * Revision 1.11 1998/10/16 08:14:34 adam
+ * Updated record control system.
+ *
+ * Revision 1.10 1998/09/22 10:03:42 adam
+ * Changed result sets to be persistent in the sense that they can
+ * be re-searched if needed.
+ * Fixed memory leak in rsm_or.
+ *
+ * Revision 1.9 1998/09/02 13:53:17 adam
+ * Extra parameter decode added to search routines to implement
+ * persistent queries.
+ *
+ * Revision 1.8 1998/08/24 17:29:23 adam
+ * Minor changes.
+ *
+ * Revision 1.7 1998/06/24 12:16:13 adam
+ * Support for relations on text operands. Open range support in
+ * DFA module (i.e. [-j], [g-]).
+ *
+ * Revision 1.6 1998/06/22 11:36:47 adam
+ * Added authentication check facility to zebra.
+ *
+ * Revision 1.5 1998/06/13 00:14:08 adam
+ * Minor changes.
+ *
+ * Revision 1.4 1998/06/12 12:22:12 adam
+ * Work on Zebra API.
+ *
+ * Revision 1.3 1998/05/27 16:57:44 adam
+ * Zebra returns surrogate diagnostic for single records when
+ * appropriate.
+ *
+ * Revision 1.2 1998/05/20 10:12:19 adam
+ * Implemented automatic EXPLAIN database maintenance.
+ * Modified Zebra to work with ASN.1 compiled version of YAZ.
+ *
+ * Revision 1.1 1998/03/05 08:45:13 adam