WNINTRO(3WN)

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:

Category | Manual Page | Object 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.

Integer | Synset Type | Syntactic Category | Char | String
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.