<xs:complexType name="PaymentType"> <xs:sequence> <xs:element ref="adsml:Status" minOccurs="0" /> <xs:element name="Mechanism" type="PaymentMechanismType" /> <xs:element name="Receipt" minOccurs="0"> <xs:complexType> <xs:sequence> <xs:element ref="SendCopyTo" minOccurs="0" maxOccurs="unbounded" /> </xs:sequence> <xs:attribute name="sendToPayer" type="adsml:BooleanType" use="required" fixed="true" /> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType>