The DTIF input converter converts a DTIF input file to an
    intermediate format that is then converted to the specified
    output file format. DTIF (Digital Table Interchange Format) is
    a standard format for the storage and interchange of tabular
    data files, such as those created by spreadsheet and database
    applications.

    If the DTIF input file is a newer version of the DTIF grammar
    than that understood by the DTIF front end, data represented by
    the new grammar elements is lost.

    The DTIF input converter does not resolve external references. A
    document syntax error in the DTIF input file causes a fatal input
    processing error. A document syntax error in the DTIF input file
    causes a fatal input processing error and conversion stops.