Reference to an external document (ID) when it is necessary to specify the details of the item.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Document reference
Example value
doc4353.pdf
Business terms
tir01-p007
Rules
Identifier/Error message Flag
EHF-P09-CHA-B26501
Document MUST NOT contain elements not part of the data model.
fatal