+ * Revision 1.11 1995-10-06 16:33:37 adam
+ * Use attribute mappings.
+ *
+ * Revision 1.10 1995/09/29 14:01:41 adam
+ * Bug fixes.
+ *
+ * Revision 1.9 1995/09/28 12:10:32 adam
+ * Bug fixes. Field prefix used in queries.
+ *
+ * Revision 1.8 1995/09/28 09:19:42 adam
+ * xfree/xmalloc used everywhere.
+ * Extract/retrieve method seems to work for text records.
+ *
+ * Revision 1.7 1995/09/27 12:22:28 adam
+ * More work on extract in record control.
+ * Field name is not in isam keys but in prefix in dictionary words.
+ *
+ * Revision 1.6 1995/09/14 07:48:23 adam
+ * Record control management.
+ *
+ * Revision 1.5 1995/09/11 13:09:34 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 1995/09/07 13:58:36 adam
+ * New parameter: result-set file descriptor (RSFD) to support multiple
+ * positions within the same result-set.
+ * Boolean operators: and, or, not implemented.
+ * Result-set references.
+ *
+ * Revision 1.2 1995/09/06 16:11:17 adam