      *    </table>
      *
      *  <p>A single white space is allowed between the number and the
-     *  minus sign or parenthesis.</p>
+     *  minus sign or parenthesis. A white space
+     *  character is a character that has a Space Separator (Zs) property
+     *  in the Unicode Character Database (see http://www.unicode.org/ucd/).</p>
      *
      *  <p>Other properties are ignored when determining a valid number.
      *  Specifically the value of the
      *  <code>digitsType</code> property is ignored and the digits can be
      *  from any of
-     *  the digit sets that are enumerated in the NationalDigitsType class.
+     *  the digit sets that are enumerated in the 
+     *  <code>NationalDigitsType</code> class.
      *  The values of the <code>groupingPattern</code>
      *  and <code>useGrouping</code> properties do not influence the
      *  parsing of the number.

     *  By using an MXML declaration and specifying the locale value in
     *  the list of assignments.
     *  <listing version="3.0" >
     *  &lt;fx:Declarations&gt;
     *      &lt;s:NumberFormatter id="nf_French_France" locale="fr_FR" /&gt;
     *  &lt;/fx:Declarations&gt;
     *  </listing>
     *  </li>

        if (!g11nWorkingInstance)
        {
            if (4 < value)
            {
                const message:String = 
                    resourceManager.getString("core","badIndex",
                        [ negativeNumberFormat ]);
                throw new ArgumentError(message);
            }
        }

        setBasicProperty(properties, NEGATIVE_NUMBER_FORMAT, value);
