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NAME

       wnintro - introduction to WordNet library functions

DESCRIPTION

       This  section  of  the  WordNet  Reference  Manual contains manual pages that describe the
       WordNet library functions and API.

       Functions are organized into the following categories:

                            ┌────────────────┬────────────────┬─────────────┐
                            │CategoryManual PageObject File │
                            ├────────────────┼────────────────┼─────────────┤
                            │Database Search │ wnsearch (3WN) │ search.o    │
                            │Morphology      │ morph (3WN)    │ morph.o     │
                            │Misc. Utility   │ wnutil (3WN)   │ wnutil.o    │
                            │Binary Search   │ binsrch (3WN)  │ binsrch.o   │
                            └────────────────┴────────────────┴─────────────┘
       The WordNet library is used by all of the searching interfaces provided with  the  various
       WordNet  packages.   Additional  programs  in  the  system,  such  as grind(1WN), also use
       functions in this library.

       The WordNet library is provided in both source and binary forms  (on  some  platforms)  to
       allow  users  to build applications and tools to their own specifications that utilize the
       WordNet database.  We do not provide programming support or assistance.

       The code conforms to ANSI C standards.  Functions are defined  with  function  prototypes.
       If  you  do not have a compiler that accepts prototypes, you must edit the source code and
       remove the prototypes before compiling.

LIST OF WORDNET LIBRARY FUNCTIONS

       Not all library functions are listed below. Missing are mainly functions that  are  called
       by  documented  ones,  or  ones  that were written for specific applications or tools used
       during WordNet development.  Data structures are defined in wn.h.

   Database Searching Functions (search.o)
       findtheinfo              Primary search function for WordNet database.  Returns  formatted
                                search  results  in  text  buffer.  Used by WordNet interfaces to
                                perform requested search.

       findtheinfo_ds           Primary search function for  WordNet  database.   Returns  search
                                results in linked list data structure.

       is_defined               Set  bit  for  each search type that is valid for the search word
                                passed and return bit mask.

       in_wn                    Set bit for each syntactic category that search word is in.

       index_lookup             Find  word  in  index  file  and  return  parsed  entry  in  data
                                structure.  Input word must be exact match of string in database.
                                Called by getindex().

       getindex                 Find word in index file, trying different  techniques  -  replace
                                hyphens with underscores, replace underscores with hyphens, strip
                                hyphens and underscores, strip periods.

       read_synset              Read synset from data file  at  byte  offset  passed  and  return
                                parsed entry in data structure.  Calls parse_synset().

       parse_synset             Read  synset  at  current  byte  offset in file and return parsed
                                entry in data structure.

       free_syns                Free a synset linked list allocated by findtheinfo_ds().

       free_synset              Free a synset structure.

       free_index               Free an index structure.

       traceptrs_ds             Recursive search algorithm to trace a  pointer  tree  and  return
                                results in linked list.

       do_trace                 Do  requested  search on synset passed returning formatted output
                                in buffer.

   Morphology Functions (morph.o)
       morphinit                Open exception list files.

       re_morphinit             Close exception list files and reopen.

       morphstr                 Try to find base form (lemma) of word or collocation in syntactic
                                category  passed.   Calls  morphword()  for  each  word in string
                                passed.

       morphword                Try to find base form (lemma) of  individual  word  in  syntactic
                                category passed.

   Utility Functions (wnutil.o)
       wninit                   Top   level  function  to  open  database  files  and  morphology
                                exception lists.

       re_wninit                Top level  function  to  close  and  reopen  database  files  and
                                morphology exception lists.

       cntwords                 Count  the  number  of  underscore  or space separated words in a
                                string.

       strtolower               Convert string to lower case and remove trailing adjective marker
                                if found.

       ToLowerCase              Convert string passed to lower case.

       strsubst                 Replace all occurrences of from with to in str.

       getptrtype               Return code for pointer type character passed.

       getpos                   Return syntactic category code for string passed.

       getsstype                Return synset type code for string passed.

       FmtSynset                Reconstruct synset string from synset pointer.

       StrToPos                 Passed  string  for  syntactic  category,  returns  corresponding
                                integer value.

       GetSynsetForSense        Return synset for sense key passed.

       GetDataOffset            Find synset offset for sense.

       GetPolyCount             Find polysemy count for sense passed.

       GetWORD                  Return word part of sense key.

       GetPOS                   Return syntactic category code for sense key passed.

       WNSnsToStr               Generate sense key for index entry passed.

       GetValidIndexPointer     Search for string and/or base form of word in database and return
                                index structure for word if found.

       GetWNSense               Return sense number in database for sense key.

       GetSenseIndex            Return parsed sense index entry for sense key passed.

       default_display_message  Default  function  to  use  as  value of display_message.  Simply
                                returns -1.

   Binary Search Functions (binsrch.o)
       bin_search               General purpose binary search function to search for key as first
                                item on line in sorted file.

       copyfile                 Copy contents from one file to another.

       replace_line             Replace a line in a sorted file.

       insert_line              Insert a line into a sorted file.

HEADER FILE

       wn.h                WordNet   include   file   of  constants,  data  structures,  external
                           declarations for global variables  initialized  in  wnglobal.c.   Also
                           lists  function prototypes for library API. It must be included to use
                           any WordNet library functions.

NOTES

       All library functions that access the database files expect the files  to  be  open.   The
       function  wninit(3WN)  must  be  called  before  other  database  access functions such as
       findtheinfo(3WN) or read_synset(3WN).

       Inclusion of the header file wn.h is necessary.

       The command line interface is a good example of a simple  application  that  uses  several
       WordNet library functions.

       Many  of  the  library  functions  are  passed or return syntactic category or synset type
       information.  The following table lists the possible categories as integer  codes,  synset
       type  constant  names,  syntactic category constant names, single characters and character
       strings.

                     ┌────────┬─────────────┬────────────────────┬──────┬─────────┐
                     │IntegerSynset TypeSyntactic CategoryCharString  │
                     ├────────┼─────────────┼────────────────────┼──────┼─────────┤
                     │   1    │ NOUN        │ NOUN               │  n   │ noun    │
                     │   2    │ VERB        │ VERB               │  v   │ verb    │
                     │   3    │ ADJ         │ ADJ                │  a   │ adj     │
                     │   4    │ ADV         │ ADV                │  r   │ adv     │
                     │   5    │ SATELLITE   │ ADJ                │  s   │ n/a     │
                     └────────┴─────────────┴────────────────────┴──────┴─────────┘

ENVIRONMENT VARIABLES (UNIX)

       WNHOME              Base directory for WordNet.  Default is /usr/local/WordNet-3.0.

       WNSEARCHDIR         Directory in which the WordNet database has been  installed.   Default
                           is WNHOME/dict.

REGISTRY (WINDOWS)

       HKEY_LOCAL_MACHINE\SOFTWARE\WordNet\3.0\WNHome
                           Base directory for WordNet.  Default is C:\Program Files\WordNet\3.0.

FILES

       lib/libwn.a                   WordNet library (Unix)

       lib\wn.lib                    WordNet library (Windows)

       include                       header files for use with WordNet library

SEE ALSO

       wnintro(1WN),   binsrch(3WN),   morph(3WN),   wnsearch(3WN),   wnutil(3WN),  wnintro(5WN),
       wnintro(7WN).

       Fellbaum,  C.  (1998),  ed.   "WordNet:  An  Electronic  Lexical  Database".   MIT  Press,
       Cambridge, MA.

BUGS

       Please report bugs to wordnet@princeton.edu.