
        XRF is a program that will create a concordance of an input file.
        It prints the input file with line numbers, and follows that with
        an alphabetical cross-reference of every word used in the input
        file and the line number(s) on which each word appears.

        A brief summary of the usage of XRF:

        XRF                                print out usage information for XRF

        XRF <infile.ext>                   creates a concordance of the input 
                                           file under the name  "<outfile>.X"

        XRF -O <outfile.ext> <infile.ext>  creates a concordance of the input
                                           file under the name "outfile.ext"
