Re: Draft 5 of UBL 2 Invoice Calculation Model Rules

[Stephen Green <stephengreenubl@gmail.com>]

Please would somebody especially review rules 6 and 8 where
PrepaidAmount is concerned. I have tried to avoid issues around
PrepaidAmount and taxes.

Also, I have not much experience with rounding amounts to know
whether, if declared in the invoice, it affects these rules.
---
Stephen D Green




2009/10/8 Stephen Green <stephengreenubl@gmail.com>:
> Draft 5 of UBL 2 Invoice Calculation Model Rules
>
>
>
>    The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
>     NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and
>     "OPTIONAL" in this document are to be interpreted as described in
>     RFC 2119.
>
>     http://www.ietf.org/rfc/rfc2119.txt
>
>
> -------
> U2ICMDraft5Rule1:
>
> "To be a conforming UBL 2 invoice the document MUST be valid according
> to a standard UBL 2 Invoice schema."
>
> [A prerequisite to the following rules is that all amounts concerned
> are expressed in the same currency.]
>
> U2ICMDraft5Rule2:
>
> "The 'LineExtensionAmount' in the invoice 'LegalMonetaryTotal' SHOULD
> equal the sum of all 'LineExtensionAmount's in all of the invoice lines."
>
> U2ICMDraft5Rule3:
>
> "The 'TaxExclusiveAmount' in the invoice 'LegalMonetaryTotal' SHOULD
> equal the sum of the 'LineExtensionAmount's in all of the invoice lines
> plus the sum of the invoice 'AllowanceCharge' charges minus the sum of
> the invoice 'AllowanceCharge' allowances (with the exception of there
> being no 'TaxExclusiveAmount' in the invoice 'LegalMonetaryTotal')."
>
> U2ICMDraft5Rule4:
>
> "The 'AllowanceTotalAmount' in the invoice 'LegalMonetaryTotal' SHOULD
> equal the sum of any invoice 'AllowanceCharge' allowances."
>
> U2ICMDraft5Rule5:
>
> "The 'ChargeTotalAmount' in the invoice 'LegalMonetaryTotal' SHOULD
> equal the sum of any invoice 'AllowanceCharge' charges."
>
> U2ICMDraft5Rule6:
>
> "If there are no taxes amounts in the invoice then the 'TaxExclusiveAmount'
> in the invoice 'LegalMonetaryTotal' SHOULD equal the 'LineExtensionAmount'
> minus any 'AllowanceTotalAmount' plus any 'ChargeTotalAmount' minus any
> 'PrepaidAmount' (in the invoice 'LegalMonetaryTotal'), (with the exception
> of there being no 'TaxExclusiveAmount' in the invoice 'LegalMonetaryTotal').
> If there are taxes amounts in the invoice but no PrepaidAmount then the
> 'TaxExclusiveAmount' in the invoice 'LegalMonetaryTotal' SHOULD equal the
> 'LineExtensionAmount' minus any 'AllowanceTotalAmount' plus any
> 'ChargeTotalAmount' (in the invoice 'LegalMonetaryTotal'), (with the exception
> of there being no 'TaxExclusiveAmount' in the invoice 'LegalMonetaryTotal')."
>
> U2ICMDraft5Rule7:
>
> "Any 'TaxInclusiveAmount' in the invoice 'LegalMonetaryTotal' SHOULD be
> equal to the 'TaxExclusiveAmount' (in the invoice 'LegalMonetaryTotal')
> plus the sum of any invoice total tax amounts (at invoice document level)
> (with the exception of there being tax amounts in currencies other
> than the currency of the invoice totals or there being is no
> 'TaxExclusiveAmount' in the invoice 'LegalMonetaryTotal')."
>
> U2ICMDraft5Rule8:
>
> "The 'PayableAmount' in the invoice 'LegalMonetaryTotal' SHOULD be
> equal to any 'TaxInclusiveAmount' (in the invoice 'LegalMonetaryTotal')
> minus any 'PrepaidAmount' (in the invoice 'LegalMonetaryTotal') unless
> there is no 'TaxInclusiveAmount' and there are no tax amounts in
> which case the 'PayableAmount' SHOULD equal the 'TaxExclusiveAmount'
> minus any 'PrepaidAmount' (in the invoice 'LegalMonetaryTotal') (with
> the exception of there being no 'TaxExclusiveAmount' in the invoice
> 'LegalMonetaryTotal')."
>
> U2ICMDraft5Rule9:
>
> "The sum of any invoice document level tax total amounts SHOULD equal the
> sum of any document level subtotal tax amounts (with the exception of
> the number of different currencies for taxes in the invoice being
> greater than one)."
>
> U2ICMDraft5Rule10:
>
> "Any implementation of the UBL 2 invoice which overrides any of these rules
> SHOULD make this explicit and explicitly state the overriding calculation
> rules."
>
>
> ------
>
> ---
> Stephen D Green
>