An identification of the specification containing the total set of rules regarding semantic content, cardinalities and business rules to which the data contained in the instance document conforms. The identification may include the version of the specification as well as any customizations applied.

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Identifier
Fixed value
urn:fdc:peppol.eu:prac:trns:t009:1.1
Rules
Identifier/Error message Flag
PEPPOL-T009-R012
CustomizationID value MUST be 'urn:fdc:peppol.eu:prac:trns:t009:1.1'
fatal
PEPPOL-T009-S009
CustomizationID SHOULD NOT have any attributes.
warning