Basic System DMS PROC › SELECT Command › DSCL SELECT CRITERIA Field Name Descriptions › GDGGEN — Relative generation number (number)

GDGGEN — Relative generation number (number)

For non-GDG data sets (see the previous field GDG), the value of this field is set to 0. For GDG data sets, this field is set to the relative generation number as shown by the catalog.

For example, to select GDG generations older than the three most current versions (older than the -2, -1 and 0 generations) use:

SELECT CRITERIA=(GDGGEN,LE,-3)

Because non-GDGs are given a relative generation number of 0, to select the most current version of GDGs, use:

SELECT CRITERIA=(GDG,EQ,YES,AND,GDGGEN,EQ,0)