With ODS-5, RMS supports access to files and directories whose
    names contain arbitrary 8-bit characters, except for the C0
    control set (hex 00 through 1F) and the following characters:

       Double quotation marks (")
       Asterisk (*)
       Backslash (\)
       Colon (:)
       Left and right angle brackets (< >)
       Slash (/)
       Question mark (?)
       Vertical bar (|)

    Note that this explicitly includes both the C1 character set (hex
    80-9F) as well as graphical and other characters between 9F and
    FF. This allows the entire ISO Latin-1 character set (with the
    7-bit character exclusions noted above) and any defined Unicode
    character.