<xsd:element name="seller" minOccurs="0"> <xsd:annotation> <xsd:documentation xml:lang="en">The party that has sold.</xsd:documentation> </xsd:annotation> <xsd:complexType> <xsd:simpleContent> <xsd:extension base="PayerReceiverEnum"> <xsd:attribute name="id" type="xsd:ID" /> </xsd:extension> </xsd:simpleContent> </xsd:complexType> </xsd:element>