lookbib(1)                                             lookbib(1)



     NAME
          lookbib, indxbib - build inverted index for a bibliography,
          find references in a bibliography

     SYNOPSIS
          lookbib [-n] database
          indxbib database...

     DESCRIPTION
          indxbib makes an inverted index to the named databases (or
          files) for use by lookbib(1) and refer(1).  These files
          contain bibliographic references (or other kinds of
          information) separated by blank lines.

          A bibliographic reference is a set of lines, constituting
          fields of bibliographic information.  Each field starts on a
          line beginning with a ``%'', followed by a key-letter, then
          a blank, and finally the contents of the field, which may
          continue until the next line starting with ``%''.

          indxbib is a shell script that calls /usr/lib/refer/mkey and
          /usr/lib/refer/inv.  The first program, mkey, truncates
          words to 6 characters, and maps upper case to lower case.
          It also discards words shorter than 3 characters, words
          among the 100 most common English words, and numbers (dates)
          < 1900 or > 2000.  These parameters can be changed; see
          refer(1).  The second program, inv, creates an entry file
          (.ia), a posting file (.ib), and a tag file (.ic), all in
          the working directory.

          lookbib uses an inverted index made by indxbib to find sets
          of bibliographic references.  It reads keywords typed after
          the ``>'' prompt on the terminal, and retrieves records
          containing all these keywords.  If nothing matches, nothing
          is returned except another ``>'' prompt.

          lookbib will ask if you need instructions, and will print
          some brief information if you reply ``y''.  The ``-n'' flag
          option turns off the prompt for instructions.

          It is possible to search multiple databases, as long as they
          have a common index made by indxbib.  In that case, only the
          first argument given to indxbib is specified to lookbib.

          If lookbib does not find the index files (the .i[abc]
          files), it looks for a reference file with the same name as
          the argument, without the suffixes.  It creates a file with
          a ``.ig'' suffix, suitable for use with fgrep.  It then uses
          this fgrep file to find references.  This method is simpler
          to use, but the .ig file is slower to use than the .i[abc]
          files, and does not allow the use of multiple reference
          files.



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     lookbib(1)                                             lookbib(1)



     FILES
          /usr/ucb/lookbib
          /usr/ucb/indxbib
          x.ia, x.ib, x.ic, where x is the first argument, or if these
          are not present, then x.ig.

     SEE ALSO
          refer(1), addbib(1), sortbib(1), roffbib(1).

     BUGS
          Probably all dates should be indexed, since many disciplines
          refer to literature written in the 1800s or earlier.











































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