Appendix A: Valid Characters for CMDPREFIX

Appendix A: Valid Characters for CMDPREFIX

The valid characters for CMDPREFIX in this appendix are defined under the sysplex command prefix service and are documented in the OS/390 V2R9.0 MVS Auth Assembler Services Guide. The restrictions and rules you use for the CMDPREFIX parameter of the MIMINIT command on a z/OS system are the same as the ones you use for the CMDPREFIX parameter on a z/VM system.

Defining the same value for CMDPREFIX on z/VM as you do on z/OS enables you to issue cross-system commands from z/OS to both z/VM and z/OS systems using the same prefix. This appendix provides information you can use to define the command prefix string so that you can issue cross-system commands.

Defining the Command Prefix String

The command prefix string can be defined as one to eight characters. You should not choose a command character prefix string that will conflict with a command, an abbreviation of a command, or a command invocation. You should not define a command prefix string such that the prefix is either a subset or a superset of an existing prefix with the same first character.

For example, if !MIM is already defined as a command prefix, then !, !M, and !MI are subsets of and conflict with the original command prefix string. Likewise, !MIM1 and !MIMM will also conflict with the original command prefix string because they are both supersets of the first command prefix string. The z/OS DISPLAY OPDATA command can be used to determine all previously registered command prefix strings in the running system.

CMDPREFIX Character String Set of Valid Characters

The following characters are valid for use as a subsystem command prefix string: