Specifies the successful (RETAINS=) and failed (RETAINF=) time
intervals to retain the data set. One to ten characters,
where <hhhh>, <mm>, and <ss> are numeric. This format requires
that for either keyword you enclose the entire parameter in single
quotation marks due to the colon as a special character.
You
may specify FOREVER to request the system
to retain the data set indefinitely.
You can also specify
these keywords by using a dynamic output descriptor.
Only functional
subsystems may use these keywords. See the documentation for the particular subsystem for additional
information.