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.

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Identifier
Rules
Identifier/Error message Flag
PEPPOL-T017-R007
Element 'cbc:ContractFolderID' MUST be provided.
fatal
PEPPOL-T017-R021
ContractFolderID MUST be expressed in UUID Syntax.
fatal