Appending messages to XPM's output list
XPM produces a list of messages, each with a TPS disposition value. xpmdispose appends one or more messages to that output list. All of the messages appended at one time share the same disposition.
The disposition value is one of:
continue
error
kill
(stop)over
proto
send
After processed by xpmdispose, message handles are removed from the interpreter.
How the system processes the messages depends upon their metadata values. See Message extensions.