.TH \%indxbib 1 "2 July 2023" "groff 1.23.0"
.SH Name
\%indxbib \- make inverted index for bibliographic databases
.
.
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.\" ====================================================================
.SH Synopsis
.\" ====================================================================
.
.SY \%indxbib
.RB [ \-w ]
.RB [ \-c\~\c
.IR \%common-words-file ]
.RB [ \-d\~\c
.IR dir ]
.RB [ \-f\~\c
.IR \%list-file ]
.RB [ \-h\~\c
.IR \%min-hash-table-size ]
.RB [ \-i\~\c
.IR \%excluded-fields ]
.RB [ \-k\~\c
.IR \%max-keys-per-record ]
.RB [ \-l\~\c
.IR \%min-key-length ]
.RB [ \-n\~\c
.IR \%threshold ]
.RB [ \-o\~\c
.IR file ]
.RB [ \-t\~\c
.IR \%max-key-length ]
.RI [ file\~ .\|.\|.]
.YS
.
.
.SY \%indxbib
.B \-\-help
.YS
.
.
.SY \%indxbib
.B \-v
.
.SY \%indxbib
.B \-\-version
.YS
.
.
.\" ====================================================================
.SH Description
.\" ====================================================================
.
.I \%indxbib
makes an inverted index for the bibliographic databases in each
.I file
for use with
.MR \%refer 1 ,
.MR \%lookbib 1 ,
and
.MR lkbib 1 .
.
Each created index is named
.RI file \%.i ;
writing is done to a temporary file which is then renamed to this.
.
If no
.I file
operands are given on the command line because the
.B \-f
option has been used,
and no
.B \-o
option is given,
the index will be named
.IR \%Ind\%.i .
.
.
.LP
Bibliographic databases are divided into records by blank lines.
.
Within a record,
each field starts with a
.B %
character at the beginning of a line.
.
Fields have a one letter name that follows the
.B %
character.
.
.
.LP
The values set by the
.BR \-c ,
.BR \-l ,
.BR \-n ,
and
.B \-t
options are stored in the index:
when the index is searched,
keys will be discarded and truncated in a
manner appropriate to these options;
the original keys will be used for verifying that any record
found using the index actually contains the keys.
.
This means that a user of an index need not know whether these
options were used in the creation of the index,
provided that not all the keys to be searched for
would have been discarded during indexing
and that the user supplies at least the part of each key
that would have remained after being truncated during indexing.
.
The value set by the
.B \-i
option is also stored in the index
and will be used in verifying records found using the index.
.
.
.\" ====================================================================
.SH Options
.\" ====================================================================
.
.B \-\-help
displays a usage message,
while
.B \-v
and
.B \-\-version
show version information;
all exit afterward.
.
.
.TP
.BI \-c\~ common-words-file
Read the list of common words from
.I common-words-file
instead of
.IR \%/usr/\:\%share/\:\%groff/\:\%1.23.0/\:\%eign .
.
.
.TP
.BI \-d\~ dir
Use
.I dir
as the name of the directory to store in the index,
instead of that returned by
.MR getcwd 2 .
.
Typically,
.I dir
will be a symbolic link whose target is the current working directory.
.
.
.TP
.BI \-f\~ list-file
Read the files to be indexed from
.IR list-file .
.
If
.I list-file
is
.BR \- ,
files will be read from the standard input stream.
.
The
.B \-f
option can be given at most once.
.
.
.TP
.BI \-h\~ min-hash-table-size
Use the first prime number greater than or equal to
the argument for the size of the hash table.
.
Larger values
will usually make searching faster,
but will make the index file larger
and cause
.I \%indxbib
to use more memory.
.
The default hash table size is 997.
.
.
.TP
.BI \-i\~ excluded-fields
Don't index the contents of fields whose names are in
.IR excluded-fields .
.
Field names are one character each.
.
If this option is not present,
.I \%indxbib
excludes fields
.BR X ,
.BR Y ,
and
.BR Z .
.
.
.TP
.BI \-k\~ max-keys-per-record
Use no more keys per input record than specified in the argument.
.
If this option is not present,
the maximum is 100.
.
.
.TP
.BI \-l\~ min-key-length
Discard any key whose length in characters is shorter than the value of
the argument.
.
If this option is not present,
the minimum key length
is 3.
.
.
.TP
.BI \-n\~ threshold
Discard the
.I threshold
most common words from the common words file.
.
If this option is not present,
the 100 most common words are discarded.
.
.
.TP
.BI \-o\~ basename
Name the index
.RI basename \%.i .
.
.
.TP
.BI \-t\~ max-key-length
Truncate keys to
.I max-key-length
in characters.
.
If this option is not present,
keys are truncated to 6 characters.
.
.
.TP
.B \-w
Index whole files.
.
Each file is a separate record.
.
.
.\" ====================================================================
.SH Files
.\" ====================================================================
.
.TP
.RI \%file \%.i
index for
.I file
.
.
.TP
.I \%Ind\%.i
default index name
.
.
.TP
.I \%/usr/\:\%share/\:\%groff/\:\%1.23.0/\:\%eign
contains the list of common words.
.
The traditional name,
.RI \[lq] eign \[rq],
is an abbreviation of \[lq]English ignored [word list]\[rq].
.
.
.TP
.IR \%indxbib XXXXXX
temporary file
.
.
.\" ====================================================================
.SH "See also"
.\" ====================================================================
.
\[lq]Some Applications of Inverted Indexes on the Unix System\[rq],
by M.\& E.\& Lesk,
1978,
AT&T Bell Laboratories Computing Science Technical Report No.\& 69.
.
.
.LP
.MR \%refer 1 ,
.MR lkbib 1 ,
.MR \%lookbib 1
.
.
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