Message description format

A message consists of several sections. Not all categories are used for each message. For messages that are always issued as a group, the "Explanation" section of the first message usually contains a complete description of the other messages in the group.
Explanation
Explains why VTAM® issued the message and describes all text and variables in the message.
System action
Explains the state of VTAM or the operating system after VTAM issues the message. This section also indicates whether the system is waiting for a reply.
Operator response
Describes actions that the operator can or must take at the console.
Programmer response
Suggests actions, programming changes, or system definition changes that isolate or correct errors or improve the efficiency of the system.
User response (USS messages only)
Describes actions that the user can or must take at the terminal.