cbc:ID
A unique reference of the document reference. May point to the tender, call for tenders or related documents like the ESPD response. The cbc:ID of a Call for tenders reference creates a link between the call for tender and the tender.The call for tenders and tenders reference must be a UUID
- Namespace
 cbcurn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2- Data type
 - Identifier
 - Rules
 - 
            
    
Identifier/Error message Flag PEPPOL-T005-R013 
DocumentReference Identifiers MUST be unique.fatal PEPPOL-T005-R012 
DocumentReference Identifier for a Call for Tender Reference MUST be expressed in a UUID syntax (RFC 4122)fatal