| <xs:complexType name="Payment" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:complexContent mixed="false">
    <xs:extension base="q15:PaymentBase" xmlns:q15="http://schemas.datacontract.org/2004/07/OnTime.Extensions.SDK">
      <xs:sequence>
        <xs:element minOccurs="0" name="Customer" type="ser:guid" />
        <xs:element minOccurs="0" name="Invoice" type="ser:guid" />
      </xs:sequence>
    </xs:extension>
  </xs:complexContent>
</xs:complexType> |