[BR-CO-03]-Value added tax point date (BT-7) and Value added tax point date code (BT-8) are mutually exclusive.
Stored validation assertion
((//ram:TaxPointDate) and not(//ram:DueDateTypeCode)) or (not (//ram:TaxPointDate) and (//ram:DueDateTypeCode)) or (not (//ram:TaxPointDate) and not (//ram:DueDateTypeCode))