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On 21/09/2020 11:53, Michael Kay mike@xxxxxxxxxxxx wrote:
Well, I thought about using EBV, so it means (if ($a) then $a else $b), but zero is falsey, so you get surprises with, for example I thought zero was a valid VAT rate, which would be a correct answer. And it also gets complicated with atomization: if the attribute is present but set to a zero length string, which way do you go? NaN. Business rule defaults always need specifying with a level of care and accuracy which surprises a lot of retail managers. Peter
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