</listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32</term>
       <listitem>
        <para>
         Specifies the object ID of the function to call.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int16</term>
       <listitem>
        <para>
         The number of argument format codes that follow
         (denoted <replaceable>C</replaceable> below).
         This can be zero to indicate that there are no arguments
         or that the arguments all use the default format (text);
         or one, in which case the specified format code is applied
         to all arguments; or it can equal the actual number of
         arguments.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int16[<replaceable>C</replaceable>]</term>
       <listitem>
        <para>
         The argument format codes.  Each must presently be
         zero (text) or one (binary).
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int16</term>
       <listitem>
        <para>
         Specifies the number of arguments being supplied to the
         function.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>

     <para>
      Next, the following pair of fields appear for each argument:
     </para>

     <variablelist>
      <varlistentry>
       <term>Int32</term>
       <listitem>
        <para>
         The length of the argument value, in bytes (this count
         does not include itself).  Can be zero.
         As a special case, -1 indicates a NULL argument value.
         No value bytes follow in the NULL case.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Byte<replaceable>n</replaceable></term>
       <listitem>
        <para>
         The value of the argument, in the format indicated by the
         associated format code.
         <replaceable>n</replaceable> is the above length.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>

     <para>
      After the last argument, the following field appears:
     </para>

     <variablelist>
      <varlistentry>
       <term>Int16</term>
       <listitem>
        <para>
         The format code for the function result. Must presently be
         zero (text) or one (binary).
        </para>
       </listitem>
      </varlistentry>
     </variablelist>
    </listitem>
   </varlistentry>

   <varlistentry id="protocol-message-formats-FunctionCallResponse">
    <term>FunctionCallResponse (B)</term>
    <listitem>
     <variablelist>
      <varlistentry>
       <term>Byte1('V')</term>
       <listitem>
        <para>
         Identifies the message as a function call result.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32</term>
       <listitem>
        <para>
         Length of message contents in bytes, including self.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32</term>
       <listitem>
        <para>
         The length of the function result value, in bytes (this count
         does not include itself).  Can be zero.
         As a special case, -1 indicates a NULL function result.
         No value bytes follow in the NULL case.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Byte<replaceable>n</replaceable></term>
       <listitem>
        <para>
         The value of the function result, in the format indicated by
         the associated format code.
         <replaceable>n</replaceable> is the above length.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>
    </listitem>
   </varlistentry>

   <varlistentry id="protocol-message-formats-GSSENCRequest">
    <term>GSSENCRequest (F)</term>
    <listitem>
     <variablelist>
      <varlistentry>
       <term>Int32(8)</term>