Message

Value MUST be part of code list 'Recommendation 20, including Recommendation 21 codes - prefixed with X (UN/ECE)'.

Context
/ubl:Waybill/cac:Shipment/cac:Delivery/cac:Despatch/cac:DespatchAddress/cac:LocationCoordinate/cbc:AltitudeMeasure
Test
not(@unitCode) or (some $code in $clUNECERec20 satisfies $code = @unitCode)
Code lists
Recommendation 20, including Recommendation 21 codes - prefixed with X (UN/ECE)
Usage
/ ubl:Waybill / cac:Shipment / cac:Delivery / cac:Despatch / cac:DespatchAddress / cac:LocationCoordinate / cbc:AltitudeMeasure / @unitCode