<xs:elementname="CardNbrLastFour"minOccurs="0"xmlns:xs="http://www.w3.org/2001/XMLSchema"><xs:annotation><xs:documentation><pxmlns="http://Hps.Exchange.PosGateway">The card number must end with this string.</p></xs:documentation></xs:annotation><xs:simpleType><xs:restrictionbase="xs:string"><xs:maxLengthvalue="4"/></xs:restriction></xs:simpleType></xs:element>