An identifier of a referenced purchase order, issued by the Buyer.An invoice must have buyer reference (BT-10) or purchase order reference.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Document Reference
Example value
98776
Rules
Identifier/Error message Flag
EHF-PR-B01601
Document MUST NOT contain elements not part of the data model.
fatal