X-Git-Url: http://git.indexdata.com/?p=idzebra-moved-to-github.git;a=blobdiff_plain;f=include%2Fidzebra%2Fapi.h;h=82bf7ce54686ffb02c1cac34a19388781961b096;hp=75a5d65a83b1fec0880c39ee3c7911e787ee27ca;hb=16853a7593f10680ea8d6895aa0720b9af3779e6;hpb=8ee402d79e37344b08c2b54ad45b50e8327a6c03 diff --git a/include/idzebra/api.h b/include/idzebra/api.h index 75a5d65..82bf7ce 100644 --- a/include/idzebra/api.h +++ b/include/idzebra/api.h @@ -1,8 +1,5 @@ -/* $Id: api.h,v 1.2 2004-09-27 10:44:48 adam Exp $ - Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004 - Index Data Aps - -This file is part of the Zebra server. +/* This file is part of the Zebra server. + Copyright (C) 1994-2010 Index Data Zebra is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free @@ -15,255 +12,597 @@ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License -along with Zebra; see the file LICENSE.zebra. If not, write to the -Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA -02111-1307, USA. +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ -/* Return codes: - * Most functions return an int. Unix-like, 0 means OK, - * non-zero means an error. The error info should be available - * via zebra_errCode and friends. - */ +/** \file api.h + \brief Zebra API + + Return codes: + Most functions has return type ZEBRA_RES, where ZEBRA_FAIL indicates + failure; ZEBRA_OK indicates success. +*/ -#ifndef ZEBRAAPI_H -#define ZEBRAAPI_H +#ifndef IDZEBRA_API_H +#define IDZEBRA_API_H #include -#include #include #include #include - -/* Fixme! Compare string (ignore case) */ -#ifdef WIN32 -#define STRCASECMP stricmp -#else -#define STRCASECMP strcasecmp -#endif +#include YAZ_BEGIN_CDECL typedef struct { - int processed; - int inserted; - int updated; - int deleted; - long utime; - long stime; + zint processed; + zint inserted; + zint updated; + zint deleted; + long utime; + long stime; } ZebraTransactionStatus; -/* Retrieval Record Descriptor */ +/** Retrieval Record Descriptor */ typedef struct { int errCode; /* non-zero if error when fetching this */ char *errString; /* error string */ int position; /* position of record in result set (1,2,..) */ char *buf; /* record buffer (void pointer really) */ int len; /* length */ - oid_value format; /* record syntax */ + const Odr_oid *format; /* record syntax */ char *base; - SYSNO sysno; + zint sysno; int score; } ZebraRetrievalRecord; -/* Scan Term Descriptor */ +/** Scan Term Descriptor */ typedef struct { - int occurrences; /* scan term occurrences */ + zint occurrences; /* scan term occurrences */ char *term; /* scan term string */ + char *display_term; /* display scan term entry */ } ZebraScanEntry; +/** \var ZebraHandle + \brief a Zebra Handle - (session) +*/ typedef struct zebra_session *ZebraHandle; + +/** \var ZebraService + \brief a Zebra Service handle +*/ typedef struct zebra_service *ZebraService; +/** \brief Creates a Zebra Service. + \param configName name of configuration file + + This function is a simplified version of zebra_start_res. +*/ +YAZ_EXPORT +ZebraService zebra_start(const char *configName + ) ZEBRA_GCC_ATTR((warn_unused_result)); + +/** \brief Creates a Zebra service with resources. + \param configName name of configuration file + \param def_res default resources + \param over_res overriding resources + + This function typically called once in a program. A Zebra Service + acts as a factory for Zebra session handles. +*/ +YAZ_EXPORT +ZebraService zebra_start_res(const char *configName, + Res def_res, Res over_res + ) ZEBRA_GCC_ATTR((warn_unused_result)); + +/** \brief stops a Zebra service. + \param zs service handle + + Frees resources used by the service. +*/ +YAZ_EXPORT +ZEBRA_RES zebra_stop(ZebraService zs); + +/** \brief Lists enabled Zebra filters + \param zs service handle + \param cd callback parameter (opaque) + \param cb callback function +*/ +YAZ_EXPORT +void zebra_filter_info(ZebraService zs, void *cd, + void (*cb)(void *cd, const char *name)); + -/****** - * Starting and stopping +/** \brief Creates a Zebra session handle within service. + \param zs service handle. + \param res resources to be used for the service (NULL for none) + + There should be one handle for each thread doing something + with zebra, be that searching or indexing. In simple apps + one handle is sufficient +*/ +YAZ_EXPORT +ZebraHandle zebra_open(ZebraService zs, Res res + ) ZEBRA_GCC_ATTR((warn_unused_result)); + +/** \brief Destroys Zebra session handle. + \param zh zebra session handle. */ +YAZ_EXPORT +ZEBRA_RES zebra_close(ZebraHandle zh); -/* Start Zebra using file 'configName' (usually zebra.cfg) */ -/* There should be exactly one ZebraService */ -YAZ_EXPORT ZebraService zebra_start (const char *configName); -YAZ_EXPORT ZebraService zebra_start_res (const char *configName, - Res def_res, Res over_res); +/** \brief Returns error code for last error + \param zh zebra session handle. +*/ +YAZ_EXPORT +int zebra_errCode(ZebraHandle zh); -/* Close the whole Zebra */ -YAZ_EXPORT int zebra_stop (ZebraService zs); +/** \brief Returns error string for last error + \param zh zebra session handle. +*/ +YAZ_EXPORT +const char *zebra_errString(ZebraHandle zh); -/* Report name of each record class (filter) */ -YAZ_EXPORT void zebra_filter_info(ZebraService zs, void *cd, - void (*cb)(void *cd, const char *name)); +/** \brief Returns additional info for last error + \param zh zebra session handle. +*/ +YAZ_EXPORT +char *zebra_errAdd(ZebraHandle zh); +/** \brief Returns error code and additional info for last error + \param zh zebra session handle. + \param code pointer to returned error code + \param addinfo pointer to returned additional info +*/ +YAZ_EXPORT +void zebra_result(ZebraHandle zh, int *code, char **addinfo); -/* Open a ZebraHandle */ -/* There should be one handle for each thred doing something */ -/* with zebra, be that searching or indexing. In simple apps */ -/* one handle is sufficient */ -YAZ_EXPORT ZebraHandle zebra_open (ZebraService zs); -/* Close handle */ -YAZ_EXPORT int zebra_close (ZebraHandle zh); +/** \brief Returns character set encoding for session + \param zh zebra session handle. + \returns encoding name (e.g. "iso-8859-1") +*/ +YAZ_EXPORT +const char *zebra_get_encoding(ZebraHandle zh); + +/** \brief Set limit before Zebra does approx hit count + \param zh session handle + \param approx_limit the limit + + Results will be approximiate if hit count is greater than the + limit specified. By default there is a high-limit (no limit). +*/ +ZEBRA_RES zebra_set_approx_limit(ZebraHandle zh, zint approx_limit); -/********* - * Error handling - */ +/** \brief Search using PQF Query String + \param zh session handle + \param pqf_query query + \param setname name of resultset + \param hits of hits is returned +*/ +YAZ_EXPORT +ZEBRA_RES zebra_search_PQF(ZebraHandle zh, const char *pqf_query, + const char *setname, zint *hits); + +/** \brief Search using RPN Query structure (from ASN.1) + \param zh session handle + \param o ODR handle + \param query RPN query using YAZ structure + \param setname name of resultset + \param hits number of hits is returned + \param estimated_hit_count whether hit count is an estimate + \param partial_resultset whether result is only partially evaluated +*/ +YAZ_EXPORT +ZEBRA_RES zebra_search_RPN_x(ZebraHandle zh, ODR o, Z_RPNQuery *query, + const char *setname, zint *hits, + int *estimated_hit_count, + int *partial_resultset); + + +/** \brief Search using RPN Query structure (from ASN.1) + \param zh session handle + \param o ODR handle + \param query RPN query using YAZ structure + \param setname name of resultset + \param hits number of hits is returned +*/ +YAZ_EXPORT +ZEBRA_RES zebra_search_RPN(ZebraHandle zh, ODR o, Z_RPNQuery *query, + const char *setname, zint *hits); + +/** \brief Retrieve records from result set (after search) + \param zh session handle + \param stream allocate records returned using this ODR + \param setname name of result set to retrieve records from + \param comp Z39.50 record composition + \param input_format transfer syntax (OID) + \param num_recs number of records to retrieve + \param recs store records in this structure (size is num_recs) +*/ +YAZ_EXPORT +ZEBRA_RES zebra_records_retrieve(ZebraHandle zh, ODR stream, + const char *setname, + Z_RecordComposition *comp, + const Odr_oid *input_format, + int num_recs, + ZebraRetrievalRecord *recs); +/** \brief Deletes one or more resultsets + \param zh session handle + \param function Z_DeleteResultSetRequest_{list,all} + \param num_setnames number of result sets + \param setnames result set names + \param statuses status result +*/ +YAZ_EXPORT +int zebra_deleteResultSet(ZebraHandle zh, int function, + int num_setnames, char **setnames, + int *statuses); + + +/** \brief returns number of term info terms assocaited with result set + \param zh session handle + \param setname result set name + \param num_terms number of terms returned in this integer + + This function is used in conjunction with zebra_result_set_term_info. + If operation was successful, ZEBRA_OK is returned; otherwise + ZEBRA_FAIL is returned (typically non-existing setname) +*/ +YAZ_EXPORT +ZEBRA_RES zebra_result_set_term_no(ZebraHandle zh, const char *setname, + int *num_terms); + +/** \brief returns information about a term assocated with a result set + \param zh session handle + \param setname result set name + \param no the term we want to know about (0=first, 1=second,..) + \param count the number of occurrences of this term, aka hits (output) + \param approx about hits: 0=exact,1=approx (output) + \param termbuf buffer for term string (intput, output) + \param termlen size of termbuf (input=max, output=actual length) + \param term_ref_id if non-NULL *term_ref_id holds term reference + + Returns information about one search term associated with result set. + Use zebra_result_set_term_no to read total number of terms associated + with result set. If this function can not return information, + due to no out of range or bad result set name, ZEBRA_FAIL is + returned. + The passed termbuf must be able to hold at least *termlen characters. + Upon completion, *termlen holds actual length of search term. +*/ +YAZ_EXPORT +ZEBRA_RES zebra_result_set_term_info(ZebraHandle zh, const char *setname, + int no, zint *count, int *approx, + char *termbuf, size_t *termlen, + const char **term_ref_id); + + +/** \brief performs Scan (Z39.50 style) + \param zh session handle + \param stream ODR handle for result + \param zapt Attribute plus Term (start term) + \param attributeset Attributeset for Attribute plus Term + \param position input/output position + \param num_entries number of terms requested / returned + \param entries list of resulting terms (ODR allocated) + \param is_partial upon return 1=partial, 0=complete + \param setname limit scan by this set (NULL means no limit) +*/ +YAZ_EXPORT ZEBRA_RES zebra_scan(ZebraHandle zh, ODR stream, + Z_AttributesPlusTerm *zapt, + const Odr_oid *attributeset, + int *position, int *num_entries, + ZebraScanEntry **entries, + int *is_partial, + const char *setname); + +/** \brief performs Scan (taking PQF string) + \param zh session handle + \param stream ODR handle for result + \param query PQF scan query + \param position input/output position + \param num_entries number of terms requested / returned + \param entries list of resulting terms (ODR allocated) + \param is_partial upon return 1=partial, 0=complete + \param setname limit scan by this set (NULL means no limit) +*/ +YAZ_EXPORT +ZEBRA_RES zebra_scan_PQF(ZebraHandle zh, ODR stream, const char *query, + int *position, int *num_entries, + ZebraScanEntry **entries, + int *is_partial, const char *setname); + +/** \brief authenticate user. Returns 0 if OK, != 0 on failure + \param zh session handle + \param user user name + \param pass password +*/ +YAZ_EXPORT +ZEBRA_RES zebra_auth(ZebraHandle zh, const char *user, const char *pass); + +/** \brief Normalize zebra term for register (subject to change!) + \param zh session handle + \param index_type "w", "p",.. + \param input_str input string buffer + \param input_len input string length + \param output_str output string buffer + \param output_len output string length +*/ +YAZ_EXPORT +int zebra_string_norm(ZebraHandle zh, const char *index_type, + const char *input_str, + int input_len, char *output_str, int output_len); -/* last error code */ -YAZ_EXPORT int zebra_errCode (ZebraHandle zh); +/** \brief Creates a database + \param zh session handle + \param db database to be created +*/ +YAZ_EXPORT +ZEBRA_RES zebra_create_database(ZebraHandle zh, const char *db); -/* string representatio of above */ -YAZ_EXPORT const char *zebra_errString (ZebraHandle zh); +/** \brief Deletes a database (drop) + \param zh session handle + \param db database to be deleted +*/ +YAZ_EXPORT +ZEBRA_RES zebra_drop_database(ZebraHandle zh, const char *db); -/* extra information associated with error */ -YAZ_EXPORT char *zebra_errAdd (ZebraHandle zh); +YAZ_EXPORT +ZEBRA_RES zebra_admin_shutdown(ZebraHandle zh); -/* get the result code and addinfo from zh */ -YAZ_EXPORT int zebra_result (ZebraHandle zh, int *code, char **addinfo); -/* FIXME - why is this needed?? -H */ +YAZ_EXPORT +ZEBRA_RES zebra_admin_start(ZebraHandle zh); -/* clear them error things */ -YAZ_EXPORT void zebra_clearError(ZebraHandle zh); +YAZ_EXPORT +ZEBRA_RES zebra_shutdown(ZebraService zs); -/************** - * Searching - */ +YAZ_EXPORT +ZEBRA_RES zebra_admin_import_begin(ZebraHandle zh, const char *database, + const char *record_type); -/* Search using PQF Query */ -YAZ_EXPORT int zebra_search_PQF (ZebraHandle zh, const char *pqf_query, - const char *setname, int *numhits); - -/* Search using RPN Query */ -YAZ_EXPORT int zebra_search_RPN (ZebraHandle zh, ODR o, Z_RPNQuery *query, - const char *setname, int *hits); - -/* Retrieve record(s) */ -YAZ_EXPORT int zebra_records_retrieve (ZebraHandle zh, ODR stream, - const char *setname, Z_RecordComposition *comp, - oid_value input_format, - int num_recs, ZebraRetrievalRecord *recs); - -/* Delete Result Set(s) */ -YAZ_EXPORT int zebra_deleleResultSet(ZebraHandle zh, int function, - int num_setnames, char **setnames, - int *statuses); - - -/* Browse */ -YAZ_EXPORT int zebra_scan (ZebraHandle zh, ODR stream, - Z_AttributesPlusTerm *zapt, - oid_value attributeset, - int *position, int *num_entries, - ZebraScanEntry **list, - int *is_partial); - - - -/********* - * Other - */ - -/* do authentication */ -YAZ_EXPORT int zebra_auth (ZebraHandle zh, const char *user, const char *pass); +YAZ_EXPORT +ZEBRA_RES zebra_admin_import_segment(ZebraHandle zh, + Z_Segment *segment); -/* Character normalisation on specific register . - This routine is subject to change - do not use. */ -YAZ_EXPORT int zebra_string_norm (ZebraHandle zh, unsigned reg_id, - const char *input_str, int input_len, - char *output_str, int output_len); +YAZ_EXPORT +ZEBRA_RES zebra_admin_import_end(ZebraHandle zh); +YAZ_EXPORT +ZEBRA_RES zebra_begin_trans(ZebraHandle zh, int rw + ) ZEBRA_GCC_ATTR((warn_unused_result)); -/****** - * Admin - */ - -YAZ_EXPORT int zebra_create_database (ZebraHandle zh, const char *db); -YAZ_EXPORT int zebra_drop_database (ZebraHandle zh, const char *db); +YAZ_EXPORT +ZEBRA_RES zebra_end_trans(ZebraHandle zh + ) ZEBRA_GCC_ATTR((warn_unused_result)); + +YAZ_EXPORT +ZEBRA_RES zebra_end_transaction(ZebraHandle zh, + ZebraTransactionStatus *stat); -YAZ_EXPORT int zebra_admin_shutdown (ZebraHandle zh); -YAZ_EXPORT int zebra_admin_start (ZebraHandle zh); +YAZ_EXPORT +ZEBRA_RES zebra_commit(ZebraHandle zh); -YAZ_EXPORT int zebra_shutdown (ZebraService zs); +YAZ_EXPORT +ZEBRA_RES zebra_clean(ZebraHandle zh); -YAZ_EXPORT int zebra_admin_import_begin (ZebraHandle zh, const char *database, - const char *record_type); +YAZ_EXPORT +ZEBRA_RES zebra_init(ZebraHandle zh); -YAZ_EXPORT int zebra_admin_import_segment (ZebraHandle zh, - Z_Segment *segment); +YAZ_EXPORT +ZEBRA_RES zebra_compact(ZebraHandle zh); -YAZ_EXPORT int zebra_admin_import_end (ZebraHandle zh); +YAZ_EXPORT +ZEBRA_RES zebra_repository_index(ZebraHandle zh, const char *path, + enum zebra_recctrl_action_t action); -int zebra_admin_exchange_record (ZebraHandle zh, - const char *rec_buf, - size_t rec_len, - const char *recid_buf, size_t recid_len, - int action); +YAZ_EXPORT +ZEBRA_RES zebra_repository_update(ZebraHandle zh, const char *path); -int zebra_begin_trans (ZebraHandle zh, int rw); -int zebra_end_trans (ZebraHandle zh); -int zebra_end_transaction (ZebraHandle zh, ZebraTransactionStatus *stat); +YAZ_EXPORT +ZEBRA_RES zebra_repository_delete(ZebraHandle zh, const char *path); -int zebra_commit (ZebraHandle zh); -int zebra_clean (ZebraHandle zh); +YAZ_EXPORT +ZEBRA_RES zebra_repository_show(ZebraHandle zh, const char *path); -int zebra_init (ZebraHandle zh); -int zebra_compact (ZebraHandle zh); -int zebra_repository_update (ZebraHandle zh, const char *path); -int zebra_repository_delete (ZebraHandle zh, const char *path); -int zebra_repository_show (ZebraHandle zh, const char *path); +/** \brief Simple update record + \param zh session handle + \param buf record buffer + \param buf_size record buffer size -int zebra_add_record (ZebraHandle zh, const char *buf, int buf_size); + This function is a simple wrapper or zebra_update_record with + action=action_update (insert or replace) . +*/ +YAZ_EXPORT +ZEBRA_RES zebra_add_record(ZebraHandle zh, const char *buf, int buf_size); -int zebra_insert_record (ZebraHandle zh, - const char *recordType, - SYSNO *sysno, const char *match, const char *fname, - const char *buf, int buf_size, - int force_update); -int zebra_update_record (ZebraHandle zh, - const char *recordType, - SYSNO *sysno, const char *match, const char *fname, - const char *buf, int buf_size, - int force_update); -int zebra_delete_record (ZebraHandle zh, - const char *recordType, - SYSNO *sysno, const char *match, const char *fname, - const char *buf, int buf_size, - int force_update); - -YAZ_EXPORT int zebra_resultSetTerms (ZebraHandle zh, const char *setname, - int no, zint *count, - int *type, char *out, size_t *len); +/** \brief Updates record + \param zh session handle + \param action (insert,replace,delete or update (replace/insert) + \param recordType filter type (0 indicates default) + \param sysno system id (0 may be passed for no known id) + \param match match criteria (0 may be passed for no known criteria) + \param fname filename to be printed for logging (0 may be passed) + \param buf record buffer + \param buf_size record buffer size +*/ +YAZ_EXPORT +ZEBRA_RES zebra_update_record(ZebraHandle zh, + enum zebra_recctrl_action_t action, + const char *recordType, + zint *sysno, const char *match, + const char *fname, + const char *buf, int buf_size); + +YAZ_EXPORT +ZEBRA_RES zebra_sort(ZebraHandle zh, ODR stream, + int num_input_setnames, + const char **input_setnames, + const char *output_setname, + Z_SortKeySpecList *sort_sequence, + int *sort_status + ) ZEBRA_GCC_ATTR((warn_unused_result)); -YAZ_EXPORT int zebra_sort (ZebraHandle zh, ODR stream, - int num_input_setnames, - const char **input_setnames, - const char *output_setname, - Z_SortKeySpecList *sort_sequence, - int *sort_status); +YAZ_EXPORT +ZEBRA_RES zebra_select_databases(ZebraHandle zh, int num_bases, + const char **basenames + ) ZEBRA_GCC_ATTR((warn_unused_result)); YAZ_EXPORT -int zebra_select_databases (ZebraHandle zh, int num_bases, - const char **basenames); +ZEBRA_RES zebra_select_database(ZebraHandle zh, const char *basename + ) ZEBRA_GCC_ATTR((warn_unused_result)); YAZ_EXPORT -int zebra_select_database (ZebraHandle zh, const char *basename); +void zebra_shadow_enable(ZebraHandle zh, int value); YAZ_EXPORT -int zebra_shadow_enable (ZebraHandle zh, int value); +int zebra_register_statistics(ZebraHandle zh, int dumpdict); YAZ_EXPORT -int zebra_register_statistics (ZebraHandle zh, int dumpdict); +ZEBRA_RES zebra_record_encoding(ZebraHandle zh, const char *encoding); YAZ_EXPORT -int zebra_record_encoding (ZebraHandle zh, const char *encoding); +ZEBRA_RES zebra_octet_term_encoding(ZebraHandle zh, const char *encoding); /* Resources */ YAZ_EXPORT -int zebra_set_resource(ZebraHandle zh, const char *name, const char *value); +void zebra_set_resource(ZebraHandle zh, const char *name, const char *value); YAZ_EXPORT const char *zebra_get_resource(ZebraHandle zh, - const char *name, const char *defaultvalue); + const char *name, const char *defaultvalue); + +YAZ_EXPORT +void zebra_pidfname(ZebraService zs, char *path); + +typedef struct { + char *term; + char *db; + zint sysno; + int score; +} ZebraMetaRecord; -YAZ_EXPORT void zebra_pidfname(ZebraService zs, char *path); +YAZ_EXPORT +ZebraMetaRecord *zebra_meta_records_create(ZebraHandle zh, + const char *name, + int num, zint *positions); + + +YAZ_EXPORT +ZebraMetaRecord *zebra_meta_records_create_range(ZebraHandle zh, + const char *name, + zint start, int num); + +YAZ_EXPORT +void zebra_meta_records_destroy(ZebraHandle zh, ZebraMetaRecord *records, + int num); + +YAZ_EXPORT +struct BFiles_struct *zebra_get_bfs(ZebraHandle zh); + +YAZ_EXPORT +ZEBRA_RES zebra_set_limit(ZebraHandle zh, int complement_flag, zint *ids); + +YAZ_EXPORT +ZEBRA_RES zebra_set_break_handler(ZebraHandle zh, + int (*f)(void *client_data), + void *client_data); + +YAZ_EXPORT +ZEBRA_RES zebra_register_check(ZebraHandle zh); YAZ_END_CDECL + +/** \mainpage Zebra + * + * \section intro_sec Introduction + * + * Zebra is a search engine for structure data, such as XML, MARC + * and others. + * + * API users should read the api.h for all the public definitions. + * + * The remaining sections briefly describe each of + * Zebra major modules/components. + * + * \section util Base Utilities + * + * The Zebra utilities (util.h) defines fundamental types and a few + * utilites for Zebra. + * + * \section res Resources + * + * The resources system (res.h) is a manager of configuration + * resources. The resources can be viewed as a simple database. + * Resources can be read from a configurtion file, they can be + * read or written by an application. Resources can also be written, + * but that facility is not currently in use. + * + * \section bfile Bfiles + * + * The Bfiles (bfile.h) provides a portable interface to the + * local file system. It also provides a facility for safe updates + * (shadow updates). All file system access is handle by this module + * (except for trival reads of configuration files). + * + * \section dict Dictionary + * + * The Zebra dictionary (dict.h) maps a search term (key) to a value. The + * value is a reference to the list of records identifers in which + * the term occurs. Zebra uses an ISAM data structure for the list + * of term occurrences. The Dictionary uses \ref bfile. + * + * \section isam ISAM + * + * Zebra maintains an ISAM for each term where each ISAM is a list + * of record identifiers corresponding to the records in which the + * term occur. Unlike traditional ISAM systems, the Zebra ISAM + * is compressed. The ISAM system uses \ref bfile. + * + * Zebra has more than one ISAM system. The old and stable ISAM system + * is named isamc (see isamc.h). Another version isams is a write-once + * isam system that is quite compact - suitable for CD-ROMs (isams.h). + * The newest ISAM system, isamb, is implemented as a B-Tree (see isamb.h). + * + * \section data1 Data-1 + * + * The data1 (data1.h) module deals with structured documents. The module can + * can read, modify and write documents. The document structure was + * originally based on GRS-1 - a Z39.50 v3 structure that predates + * DOM. These days the data1 structure may describe XML/SGML as well. + * The data1, like DOM, is a tree structure. Each node in the tree + * can be of type element, text (cdata), preprocessing instruction, + * comment. Element nodes can point to attribute nodes. + * + * \section recctrl Record Control + * + * The record control module (recctrl.h) is responsible for + * managing the various record types ("classes" or filters). + * + * \section rset Result-Set + * + * The Result-Set module (rset.h) defines an interface that all + * Zebra Search Results must implement. Each operation (AND, OR, ..) + * correspond to an implementation of that interface. + * + * \section dfa DFA + * + * DFA (dfa.h) Deterministic Finite Automa is a regular expression engine. + * The module compiles a regular expression to a DFA. The DFA can then + * be used in various application to perform fast match against the + * origianl expression. The \ref Dict uses DFA to perform lookup + * using regular expressions. + */ + #endif +/* + * Local variables: + * c-basic-offset: 4 + * c-file-style: "Stroustrup" + * indent-tabs-mode: nil + * End: + * vim: shiftwidth=4 tabstop=8 expandtab + */ +