Message

Value MUST be part of code list 'Measured attribute code for despatch advice (UNCL6313 Subset) T120'.

Context
/ubl:TransportExecutionPlan/cac:Consignment/cac:TransportHandlingUnit/cac:MaximumTemperature/cbc:AttributeID
Test
(some $code in $clUNCL6313-T120 satisfies $code = normalize-space(text()))
Code lists
Measured attribute code for despatch advice (UNCL6313 Subset) T120
Usage
/ ubl:TransportExecutionPlan / cac:Consignment / cac:TransportHandlingUnit / cac:MaximumTemperature / cbc:AttributeID