BEAst: T3345, Order response number. Peppol: A transaction instance must have an identifier. The identifier enables referencing the transaction for various purposes such as from other transactions that are part of the same process.

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Identifier
udt:IdentifierType
Example value
101
Business terms
tir76-003