An catalogue instance must contain an identifier. The identifier enables positive referencing the document instance for various purposes including referencing between transactions that are part of the same process.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Example value
Cat-02
Rules
Identifier/Error message Flag
BII2-T19-R004
A catalogue MUST contain the catalogue document identifier
fatal