Using

   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
 

Additional information available:

File_Specification_Differences  Directory_Specification_Differences
Working_in_Mixed_Environments   DCL_Command_Parameters
Command_File_Specification      DECwindows_Output