Library /sys$common/syshlp/HELPLIB.HLB

  The DEASSIGN statement is used to deassign a logical name.

  Format:

       DEASSIGN [qualifiers] logical-name

1 – Qualifiers

  The optional qualifiers for the DEASSIGN command are:

       /PROCESS
       /JOB
       /GROUP
       /SYSTEM
       /TABLE=name

  You should not combine any of /PROCESS, /JOB, /GROUP, /SYSTEM, and
  /TABLE.