source message deletion type, either "MSGKEY" or "TOKEN"
key identifying number of the original message
The operating system has issued a Delete Operator Message notification that a previous message (identified by a MSGKEY) or group of messages (identified by a TOKEN) have been deleted from the console.
If DOM processing is active in the VP390 job (activated by the "DOM" option on the MVS parameter card in SYSIN), then this message will be sent to the OM server. It can be used for automatically acknowledging an existing message on the OM browser. See "Using DOM Information" in Chapter 3 for more information.