| QName | Type | Fixed | Default | Use | Inheritable | Annotation | 
|---|---|---|---|---|---|---|
| invoiceDate | optional | |||||
| invoiceID | optional | 
<xs:element name="InvoiceReference"> <xs:complexType> <xs:sequence> <xs:element ref="DocumentReference"/> </xs:sequence> <xs:attribute name="invoiceID"/> <xs:attribute name="invoiceDate"/> </xs:complexType> </xs:element>  |