<xs:element name="GatewayTxnId" 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 the original debit sale this return is to be run against.</p>
      <p xmlns="http://Hps.Exchange.PosGateway" />
      <p xmlns="http://Hps.Exchange.PosGateway">
        <strong>Note:</strong> For debit returns, information is not pulled from the original debit sale for processing. The client must provide the PIN block and track data (or a token). The original transaction data will be used to validate that the card is the same and the return is less than or equal to the original amount, including any other returns against that transaction.
            </p>
    </xs:documentation>
  </xs:annotation>
</xs:element>