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.