Except a discontinuation date can be used to indicate whether the product has been discontinued or not. A blank value in that case indicates it has not. And maybe it never will be.


>If the product has not been discontinued, the discontinuation date is most certainly unknown, hence Null.
>
>Dan
>
>>Hmmm. What about something like product discontinued date? There is no valid date, nor is it unknown (null), if the product has not been discontinued.