+ * Revision 1.16 1998-05-20 10:12:17 adam
+ * Implemented automatic EXPLAIN database maintenance.
+ * Modified Zebra to work with ASN.1 compiled version of YAZ.
+ *
+ * Revision 1.15 1998/03/05 08:45:12 adam
+ * New result set model and modular ranking system. Moved towards
+ * descent server API. System information stored as "SGML" records.
+ *
+ * Revision 1.14 1997/10/27 14:33:04 adam
+ * Moved towards generic character mapping depending on "structure"
+ * field in abstract syntax file. Fixed a few memory leaks. Fixed
+ * bug with negative integers when doing searches with relational
+ * operators.
+ *
+ * Revision 1.13 1997/09/09 13:38:07 adam
+ * Partial port to WIN95/NT.
+ *
+ * Revision 1.12 1997/09/05 09:52:32 adam
+ * Extra argument added to function chr_read_maptab (tab path).
+ *
+ * Revision 1.11 1996/10/29 14:06:49 adam
+ * Include zebrautl.h instead of alexutil.h.
+ *
+ * Revision 1.10 1996/06/04 14:56:12 quinn
+ * Fix
+ *
+ * Revision 1.9 1996/06/04 14:18:53 quinn
+ * Charmap work
+ *
+ * Revision 1.8 1996/06/04 10:18:59 adam
+ * Minor changes - removed include of ctype.h.
+ *
+ * Revision 1.7 1995/10/10 12:24:38 adam
+ * Temporary sort files are compressed.
+ *
+ * Revision 1.6 1995/09/29 14:01:42 adam
+ * Bug fixes.
+ *
+ * Revision 1.5 1995/09/11 13:09:35 adam
+ * More work on relevance feedback.
+ *
+ * Revision 1.4 1995/09/08 14:52:27 adam
+ * Minor changes. Dictionary is lower case now.
+ *
+ * Revision 1.3 1995/09/06 16:11:17 adam