Extended file names provide a wider variety of character set
    options and naming conventions, similar to those available on
    Windows NT. This topic describes the impact of Extended File
    Specifications on the general user, and contains the following
    subtopics:

    o  Differences in file and directory specifications between ODS-2
       and ODS-5

    o  Manipulating extended file names

    o  Using extended file names in DCL command procedures

    o  Displaying ODS-5 file specifications in DECwindows