Re: [ubl-dev] Representing taxable freight charges in an Invoice

[Tim Anderson <tma@netspace.net.au>]

G. Ken Holman wrote:
> At 2010-10-29 09:54 +1100, Tim Anderson wrote:
>> Also, whats the rationale behind including TaxCategory in 
>> AllowanceCharge but not on InvoiceLine?
>> On InvoiceLine it looks like it must be specified via the 
>> TaxSubtotal, requiring elements to be duplicated.
> The structure supports a total tax for the line item plus a breakdown 
> of how that tax was calculated.  In my jurisdiction there used to be 
> PST and GST (provincial sales tax and goods and services tax), so 
> there would be a total tax and a breakdown of the two components.  Now 
> that there is only HST, there is both the total and a one-item 
> breakdown, just as above.  The type of tax is described in the breakdown.
>
> Remember that in UBL the recipient must not do any calculations on the 
> values received:  the UBL instance conveys both the components of a 
> total and the total itself.  The recipient should find *everything* 
> they need in the instance without doing any arithmetic.
>
Does this apply to orders? The order LineItem just specifies a tax total 
without describing how it was arrived at.
Or is this supposed to be inferred from the customer's PartyTaxScheme?

-Tim