lookbib(1)						      General Commands Manual							lookbib(1)

Name
       indxbib, lookbib - build inverted index for a bibliography, lookup bibliographic references

Syntax
       indxbib database...
       lookbib database

Description
       The  makes  an inverted index to the named databases (or files) for use by and 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 ``%''.

       The command is a shell script that calls and The first program, 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.  The second program, inv, creates an entry file (.ia), a posting file (.ib), and a tag file (.ic),  all  in  the
       working directory.

       The command uses an inverted index made by 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.

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

       If  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 suf-
       fixes.  It creates a file with a '.ig' suffix, suitable for use with It then uses this fgrep file to find references.  This method is  sim-
       pler 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.

Files
       x.ia, x.ib, x.ic, where x is the first argument, or if these are not present, then x.ig, x

See Also
       addbib(1), lookbib(1), refer(1), roffbib(1), sortbib(1),

																	lookbib(1)