Once you have a generation group
that contains more than one generation data set, you might want to
select a particular data set to process. To select a particular generation,
you use the GENNUM= data set option.
General form, GENNUM=
data set option:
Here is an explanation of the syntax:
specifies a particular
historical version of a data set:
an absolute reference to a historical version by its generation number.
a relative reference to a historical version.
the current version.