Re: [xsl] XSLT 2.0 courses?

["Peter Flynn peter@xxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

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
>
> @price * (1 + (@VAT_Rate otherwise 0.2))
>
> which potentially gives the wrong answer if @VAT_Rate is present but 
> zero.

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