A requirement to give a unique reference to the quotation that is the base for the order.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Document reference
Example value
1232424
Business terms
tir01-010
Rules
Identifier/Error message Flag
EHF-P09-CHA-B01901
Document MUST NOT contain elements not part of the data model.
fatal