RULE approval_event_with_approval_date_time

(* SCHEMA ship_moulded_form_schema; *)

  RULE approval_event_with_approval_date_time FOR (approval);

    LOCAL
      violate : LOGICAL := FALSE;
      t1_set  : SET OF approval := [];
      t2_set  : SET OF approval_date_time := [];
    END_LOCAL;
    t1_set := QUERY ( i <* approval | VALUE_IN(which_class(i),
        'approval event') );
    REPEAT i := 1 TO HIINDEX(t1_set) BY 1 WHILE NOT violate;
      t2_set := bag_to_set(USEDIN(t1_set[i],
          'SHIP_MOULDED_FORM_SCHEMA.APPROVAL_DATE_TIME.' + 'DATED_APPROVAL'));
      violate := NOT (SIZEOF(t2_set) = 1);
    END_REPEAT;

  WHERE
    wr1: (NOT violate);

  END_RULE; -- approval_event_with_approval_date_time

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