- * $Log: index.h,v $
- * Revision 1.68 2000-02-24 11:00:07 adam
- * Fixed bug: indexer would run forever when lock dir was non-existant.
- *
- * Revision 1.67 1999/11/30 13:48:03 adam
- * Improved installation. Updated for inclusion of YAZ header files.
- *
- * Revision 1.66 1999/07/14 13:21:34 heikki
- * Added isam-d files. Compiles (almost) clean. Doesn't work at all
- *
- * Revision 1.65 1999/07/14 10:59:26 adam
- * Changed functions isc_getmethod, isams_getmethod.
- * Improved fatal error handling (such as missing EXPLAIN schema).
- *
- * Revision 1.64 1999/06/30 15:07:23 heikki
- * Adding isamh stuff
- *
- * Revision 1.63 1999/05/26 07:49:13 adam
- * C++ compilation.
- *
- * Revision 1.62 1999/05/12 13:08:06 adam
- * First version of ISAMS.
- *
- * Revision 1.61 1999/03/09 16:27:49 adam
- * More work on SDRKit integration.
- *
- * Revision 1.60 1998/10/16 08:14:31 adam
- * Updated record control system.
- *
- * Revision 1.59 1998/06/08 14:43:11 adam
- * Added suport for EXPLAIN Proxy servers - added settings databasePath
- * and explainDatabase to facilitate this. Increased maximum number
- * of databases and attributes in one register.
- *
- * Revision 1.58 1998/05/20 10:12:16 adam
- * Implemented automatic EXPLAIN database maintenance.
- * Modified Zebra to work with ASN.1 compiled version of YAZ.
- *
- * Revision 1.57 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 1.56 1998/01/12 15:04:08 adam
- * The test option (-s) only uses read-lock (and not write lock).
- *
- * Revision 1.55 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 1.54 1997/09/29 09:08:36 adam
- * Revised locking system to be thread safe for the server.
- *
- * Revision 1.53 1997/09/25 14:54:43 adam
- * WIN32 files lock support.
- *
- * Revision 1.52 1997/09/22 12:39:06 adam
- * Added get_pos method for the ranked result sets.
- *
- * Revision 1.51 1997/09/18 08:59:19 adam
- * Extra generic handle for the character mapping routines.
- *
- * Revision 1.50 1997/09/17 12:19:13 adam
- * Zebra version corresponds to YAZ version 1.4.
- * Changed Zebra server so that it doesn't depend on global common_resource.
- *
- * Revision 1.49 1997/09/05 15:30:08 adam
- * Changed prototype for chr_map_input - added const.
- * Added support for C++, headers uses extern "C" for public definitions.
- *
- * Revision 1.48 1997/02/12 20:39:45 adam
- * Implemented options -f <n> that limits the log to the first <n>
- * records.
- * Changed some log messages also.
- *
- * Revision 1.47 1996/12/23 15:30:44 adam
- * Work on truncation.
- * Bug fix: result sets weren't deleted after server shut down.
- *
- * Revision 1.46 1996/11/08 11:10:19 adam
- * Buffers used during file match got bigger.
- * Compressed ISAM support everywhere.
- * Bug fixes regarding masking characters in queries.
- * Redesigned Regexp-2 queries.
- *
- * Revision 1.45 1996/10/29 14:09:42 adam
- * Use of cisam system - enabled if setting isamc is 1.
- *
- * Revision 1.44 1996/06/06 12:08:40 quinn
- * Added showRecord function
- *
- * Revision 1.43 1996/06/04 10:18:12 adam
- * Search/scan uses character mapping module.
- *
- * Revision 1.42 1996/06/04 08:20:16 quinn
- * Smallish
- *
- * Revision 1.41 1996/06/04 07:54:55 quinn
- * Added output-map.
- *
- * Revision 1.40 1996/05/31 09:06:58 quinn
- * Work on character-set handling
- *
- * Revision 1.39 1996/05/14 14:04:33 adam
- * In zebraidx, the 'stat' command is improved. Statistics about ISAM/DICT
- * is collected.
- *
- * Revision 1.38 1996/04/12 07:02:23 adam
- * File update of single files.
- *
- * Revision 1.37 1996/03/26 16:01:13 adam
- * New setting lockPath: directory of various lock files.
- *
- * Revision 1.36 1996/03/21 14:50:09 adam
- * File update uses modify-time instead of change-time.
- *
- * Revision 1.35 1996/02/12 18:45:36 adam
- * New fileVerboseFlag in record group control.
- *
- * Revision 1.34 1995/12/11 11:43:29 adam
- * Locking based on fcntl instead of flock.
- * Setting commitEnable removed. Command line option -n can be used to
- * prevent commit if commit setting is defined in the configuration file.
- *
- * Revision 1.33 1995/12/08 16:22:53 adam
- * Work on update while servers are running. Three lock files introduced.
- * The servers reload their registers when necessary, but they don't
- * reestablish result sets yet.
- *
- * Revision 1.32 1995/12/07 17:38:46 adam
- * Work locking mechanisms for concurrent updates/commit.
- *
- * Revision 1.31 1995/12/06 12:41:22 adam
- * New command 'stat' for the index program.
- * Filenames can be read from stdin by specifying '-'.
- * Bug fix/enhancement of the transformation from terms to regular
- * expressons in the search engine.
- *
- * Revision 1.30 1995/12/05 11:25:02 adam
- * Include of zebraver.h.
- *
- * Revision 1.29 1995/11/28 09:09:40 adam
- * Zebra config renamed.
- * Use setting 'recordId' to identify record now.
- * Bug fix in recindex.c: rec_release_blocks was invokeded even
- * though the blocks were already released.
- * File traversal properly deletes records when needed.
- *
- * Revision 1.28 1995/11/27 13:58:53 adam
- * New option -t. storeStore data implemented in server.
- *
- * Revision 1.27 1995/11/25 10:24:06 adam
- * More record fields - they are enumerated now.
- * New options: flagStoreData flagStoreKey.
- *
- * Revision 1.26 1995/11/22 17:19:17 adam
- * Record management uses the bfile system.
- *
- * Revision 1.25 1995/11/21 15:29:12 adam
- * Config file 'base' read by default by both indexer and server.
- *
- * Revision 1.24 1995/11/21 15:01:15 adam
- * New general match criteria implemented.
- * New feature: document groups.
- *
- * Revision 1.23 1995/11/20 16:59:45 adam
- * New update method: the 'old' keys are saved for each records.
- *
- * Revision 1.22 1995/11/20 11:56:26 adam
- * Work on new traversal.
- *
- * Revision 1.21 1995/11/16 15:34:55 adam
- * Uses new record management system in both indexer and server.
- *
- * Revision 1.20 1995/11/15 14:46:18 adam
- * Started work on better record management system.
- *
- * Revision 1.19 1995/10/27 14:00:11 adam
- * Implemented detection of database availability.
- *
- * Revision 1.18 1995/10/17 18:02:08 adam
- * New feature: databases. Implemented as prefix to words in dictionary.
- *
- * Revision 1.17 1995/10/13 16:01:49 adam
- * Work on relations.
- *
- * Revision 1.16 1995/10/10 12:24:38 adam
- * Temporary sort files are compressed.
- *
- * Revision 1.15 1995/10/04 16:57:19 adam
- * Key input and merge sort in one pass.
- *
- * Revision 1.14 1995/09/29 14:01:40 adam
- * Bug fixes.
- *
- * Revision 1.13 1995/09/28 14:22:56 adam
- * Sort uses smaller temporary files.
- *
- * Revision 1.12 1995/09/28 12:10:32 adam
- * Bug fixes. Field prefix used in queries.
- *
- * Revision 1.11 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 1.10 1995/09/14 07:48:23 adam
- * Record control management.
- *
- * Revision 1.9 1995/09/11 13:09:33 adam
- * More work on relevance feedback.
- *
- * Revision 1.8 1995/09/08 14:52:27 adam
- * Minor changes. Dictionary is lower case now.
- *
- * Revision 1.7 1995/09/06 16:11:16 adam
- * Option: only one word key per file.
- *
- * Revision 1.6 1995/09/05 15:28:39 adam
- * More work on search engine.
- *
- * Revision 1.5 1995/09/04 12:33:42 adam
- * Various cleanup. YAZ util used instead.
- *
- * Revision 1.4 1995/09/04 09:10:35 adam
- * More work on index add/del/update.
- * Merge sort implemented.
- * Initial work on z39 server.
- *
- * Revision 1.3 1995/09/01 14:06:35 adam
- * Split of work into more files.
- *
- * Revision 1.2 1995/09/01 10:30:24 adam
- * More work on indexing. Not working yet.
- *
- * Revision 1.1 1995/08/31 14:50:24 adam
- * New simple file index tool.
- *