+ * Revision 1.14 2001-01-22 11:41:41 adam
+ * Added support for raw retrieval (element set name "R").
+ *
+ * Revision 1.13 1999/09/07 07:19:21 adam
+ * Work on character mapping. Implemented replace rules.
+ *
+ * Revision 1.12 1999/05/26 07:49:14 adam
+ * C++ compilation.
+ *
+ * Revision 1.11 1999/05/21 12:00:17 adam
+ * Better diagnostics for extraction process.
+ *
+ * Revision 1.10 1999/05/20 12:57:18 adam
+ * Implemented TCL filter. Updated recctrl system.
+ *
+ * Revision 1.9 1998/10/16 08:14:38 adam
+ * Updated record control system.
+ *
+ * Revision 1.8 1998/05/20 10:12:27 adam
+ * Implemented automatic EXPLAIN database maintenance.
+ * Modified Zebra to work with ASN.1 compiled version of YAZ.
+ *
+ * Revision 1.7 1998/03/11 11:19:05 adam
+ * Changed the way sequence numbers are generated.
+ *
+ * Revision 1.6 1998/02/10 12:03:06 adam
+ * Implemented Sort.
+ *
+ * Revision 1.5 1997/10/27 14:33:06 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 1.4 1996/11/04 14:09:16 adam
+ * Minor changes.
+ *
+ * Revision 1.3 1996/11/01 09:00:33 adam
+ * This simple "text" format now supports element specs B and M.
+ *
+ * Revision 1.2 1996/10/29 14:02:45 adam
+ * Uses buffered read to speed up things.
+ *
+ * Revision 1.1 1996/10/11 10:57:28 adam