A reference to where the label specification can be found, e.g. a URI.

Cardinality
1..1
Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Document reference
Example value
http://www.label.eu/test/
Business terms
OP-110-016
Rules
Identifier/Error message Flag
EHF-T110-B24401
Document MUST NOT contain elements not part of the data model.
fatal