Defining commands
Use the DEFCMD command to perform basic command definitions that affect only your user ID. If you are a systems administrator or system programmer, use the DEFSCMD command to perform system-wide REXX/CICS command definitions.
The DEFCMD and DEFSCMD commands are used from within a REXX exec to define or change REXX command definitions. You can add or change your own command definitions, using the DEFCMD command, without any special authorization. You must be a REXX/CICS authorized user to use DEFSCMD to change command definitions that affect other REXX/CICS users. See DEFCMD and DEFSCMD for details.