ode> string MUST NOT be used to describe the type of a procedure's
        formal argument. Rather, it is strictly reserved to denote the return type of a procedure
        that is not expected to produce a result. In other words, the <code>result</code> member of the
        Procedure Return object resulting from a call to such procedure is
        not interesting because it will always be the Null value.</p>
    <p>
        It is valid for a call to supply the Null value for any parameter no matter how
  