+ * Revision 1.17 2001-10-03 23:54:41 adam
+ * Fixes for numeric ranges (date=1980-1990).
+ *
+ * Revision 1.16 2001/03/07 13:24:40 adam
+ * Member and_not in Z_Operator is kept for backwards compatibility.
+ * Added support for definition of CCL operators in field spec file.
+ *
+ * Revision 1.15 2000/05/01 09:36:50 adam
+ * Range operator only treated in ordered ranges so that minus (-) can be
+ * used for, say, the and-not operator.
+ *
+ * Revision 1.14 2000/03/14 09:06:11 adam
+ * Added POSIX threads support for frontend server.
+ *
+ * Revision 1.13 2000/02/08 10:39:53 adam
+ * Added a few functions to set name of operands, etc.
+ *
+ * Revision 1.12 2000/01/31 13:15:21 adam
+ * Removed uses of assert(3). Cleanup of ODR. CCL parser update so
+ * that some characters are not surrounded by spaces in resulting term.
+ * ILL-code updates.
+ *
+ * Revision 1.11 1999/11/30 13:47:11 adam
+ * Improved installation. Moved header files to include/yaz.
+ *
+ * Revision 1.10 1998/07/07 15:49:41 adam
+ * Added braces to avoid warning.
+ *
+ * Revision 1.9 1998/02/11 11:53:33 adam
+ * Changed code so that it compiles as C++.
+ *
+ * Revision 1.8 1997/09/29 08:56:38 adam
+ * Changed CCL parser to be thread safe. New type, CCL_parser, declared
+ * and a create/destructers ccl_parser_create/ccl_parser/destory has
+ * been added.
+ *
+ * Revision 1.7 1997/09/01 08:48:12 adam
+ * New windows NT/95 port using MSV5.0. Only a few changes made
+ * to avoid warnings.
+ *
+ * Revision 1.6 1997/04/30 08:52:07 quinn
+ * Null
+ *
+ * Revision 1.5 1996/10/11 15:00:26 adam
+ * CCL parser from Europagate Email gateway 1.0.
+ *
+ * Revision 1.10 1995/07/11 12:28:31 adam
+ * New function: ccl_token_simple (split into simple tokens) and
+ * ccl_token_del (delete tokens).
+ *
+ * Revision 1.9 1995/05/16 09:39:28 adam
+ * LICENSE.
+ *
+ * Revision 1.8 1995/05/11 14:03:57 adam
+ * Changes in the reading of qualifier(s). New function: ccl_qual_fitem.
+ * New variable ccl_case_sensitive, which controls whether reserved
+ * words and field names are case sensitive or not.
+ *
+ * Revision 1.7 1995/04/19 12:11:24 adam
+ * Minor change.
+ *
+ * Revision 1.6 1995/04/17 09:31:48 adam
+ * Improved handling of qualifiers. Aliases or reserved words.