cac:OrderReference
The order can be referred to at header level or here. Doing it here at line level it is possible to refer to multiple order in one document.
- Namespace
 cacurn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2- Child elements
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Card Name Description 0..1 cbc:ID Order number
The order number referred to.Example value:
AEG0123450..1 cbc:SalesOrderID Sales order number
Reference to the sellers order number.Example value:
5678985 - Rules
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Identifier/Error message Flag PEPPOL-T128-B18701 
Document MUST NOT contain elements not part of the data model.fatal