The following example removes a part with a specified PART_ID
       from its membership in the set ALL_PARTS_ACTIVE:

       DTR> FOR P IN PART WITH PART_ID = "TU4722AS"
       CON>     DISCONNECT P FROM ALL_PARTS_ACTIVE
       DTR>

       The following example removes the group named PLANT ENGINEERING
       from the set MANAGES:

       DTR> FIND GROUPS WITH GROUP_NAME = "PLANT ENGINEERING"
       DTR> SELECT
       DTR> DISCONNECT CURRENT FROM MANAGES
       DTR>