Identifies the document being referred to.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Identifier
Example value
Cat-12
Business terms
tir58-016
Rules
Identifier/Error message Flag
EHF-T58-B02801
Document MUST NOT contain elements not part of the data model.
fatal