<xs:element name="TxnId" type="txnIdType" minOccurs="0" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:annotation>
    <xs:documentation>
      <p xmlns="http://Hps.Exchange.PosGateway">Gateway-generated transaction identifier returned in the response of the original transaction. This indicates a specific transaction to be returned.</p>
      <p xmlns="http://Hps.Exchange.PosGateway">If supplied, the search will return a single record unless used in conjunction with FindHistoryInd.  Otherwise, any other criteria is ignored.</p>
      <p xmlns="http://Hps.Exchange.PosGateway" />
      <p xmlns="http://Hps.Exchange.PosGateway">
        <strong>Note:</strong> This is the value referred to as GatewayTxnId in other messages.
            </p>
    </xs:documentation>
  </xs:annotation>
</xs:element>