Controls whether records dated earlier than the specified time
    are selected.
    Format
      /BEFORE[=time]
      /NOBEFORE
    time
    Specifies the time used to select records. Records dated earlier
    than the specified time are selected. You can specify an absolute
    time, delta time, or a combination of the two. Observe the syntax
    rules for date and time described in the OpenVMS User's Manual.
Additional Information:
explode
extract