1    /ENCODING

       /ENCODING=type

    This qualifier controls the type of encoding used to encode the
    input file. The possible values for this qualifier are BASE64,
    CBASE64 (gzip compressed BASE64), BASE85, BINHEX (encoding only,
    not the file format), BTOA, HEXADECIMAL, PATHWORKS, QUOTED_
    PRINTABLE, UUENCODE, CUUENCODE (gzip compressed UUENCODE). BASE64
    encoding is the default; this is also the default decoding type
    used by DECODE.

2    /FILENAME

       /FILENAME
       /NOFILENAME (default)

    When used in conjunction with the /HEADER qualifier, this
    qualifier specifies that the filename should be included in the
    MIME headers generated. Only the name and extension portion of
    the file specification will be used; any node, device, directory,
    and version number information will be discarded. This qualifier
    does not specify the input file to use; only the name to use
    for the name parameter of the Content-type: header line and the
    filename parameter of the Content-disposition: header line. By
    default, no filename parameter is specified in the Content-type:
    or Content-disposition: header lines.

    Or if used with /ENCODING=UUENCODE, the /FILENAME qualifier
    causes the filename to be included on the "begin 600" line.

3    /HEADER

       /HEADER
       /NOHEADER (default)

    This qualifier controls whether or not a MIME-compliant header
    is placed at the beginning of the output. /HEADER is the default.
    /NOHEADER is used to produce output suitable for use in non-MIME
    messaging applications. Note that all structural information
    about the file is lost when /NOHEADER is used.