[UBL-CR-600]-A UBL invoice should not include the InvoiceLine Item ClassifiedTaxCategory TaxExemptionReasonCode
UBL-CR-600
/ubl:Invoice | /cn:CreditNote
not((cac:InvoiceLine|cac:CreditNoteLine)/cac:Item/cac:ClassifiedTaxCategory/cbc:TaxExemptionReasonCode)