Reference to the procurement procedure that this response refers to.

Namespace
cac urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2
Data type
cac:DocumentReferenceType
Child elements
Card Name Description
1..1 cbc:ID

Document identifier
An identifier that is specified by the buyer and used as a reference number for all documents in the procurement process. It is also known as procurement project identifier, procurement reference number or contract folder identifier.