It should be possible to specify the identifier or identifiers for the party.

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Identifier
udt:IdentifierType
Example value
12345678
Business terms
tir58-011
Attributes
Use Name Description
O @schemeID

Scheme identifier
Scheme identifier of the Provider identification

Example value: 0184