is the name of the external target environment you used in a
REXX exec issuing this command. This is the external environment name
that you directed the command string to. This environment name is
looked up in a table and together with the command name determines
which program, REXX exec, or queue this command string is directed
to for processing.
Note: The external target can match the
environment name on the ADDRESS keyword instruction or can be specified
as the first token of the command string, if REXXCICS is the current
environment (which is the default).