Positive identification of the reference such as a unique identifier. To positively identify relevant contractual issues the invoice may contain an identifier of a contract that applies to the invoice.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Example value
Framework F32165
Rules
Identifier/Error message Flag
NOGOV-T10-R005
ContractDocumentReference SHOULD be provided according to EHF.
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