LOCAL
    result : SET OF  STRING;
    classifications : BAG OF Classification_assignment;
  END_LOCAL;

  result := TYPEOF(the_instance);
  classifications := USEDIN(the_instance,'GENERAL_MODEL_PARAMETER_ARM.CLASSIFICATION_ASSIGNMENT.ITEMS');

  REPEAT i := LOINDEX(classifications) TO HIINDEX(classifications);
    result := result + classifications[i].ASSIGNED_CLASS.ID;
  END_REPEAT;

  RETURN (result);