Used to reference the order change that is being responded to.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Document reference
Example value
oc-23424
Rules
Identifier/Error message Flag
EHF-P09-RES-B01601
Document MUST NOT contain elements not part of the data model.
fatal