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Subject: Re: [ubl-dev] UBL Calculation Models (was Re: LegalMonetaryTotal.LineExtensionAmount)

Thanks Ken for sharing the information.
Yes getting the calculation models updated needs to be done. 
If we could extend this with models from the ERP systems it would be beneficial to a lot of people.

On Wednesday, October 16, 2013 8:08 PM, G. Ken Holman <gkholman@CraneSoftwrights.com> wrote:
At 2013-10-16 10:44 -0700, Danny Gaethofs wrote:
>These usage definitions are interesting. Working with UBL /
>UN/CEFACT and other XML standards for a long time one of the biggest
>problems is the right use of fields / elements especially if you
>need to define how the mapping should be done to ERP standards (such as SAP).

Yes, the "calculation model" is an important aspect of documenting a
customization of OASIS UBL in a particular context.  UBL requires
that all fields in a document be pre-calculated according to the
calculation model so that the recipient has no obligation of any kind
to calculate any values on their own ... only the sender knows for
sure which calculation model they intended to use for all fields.

But the committee itself hasn't yet published "recommended"
calculation models.  Some of the definitions imply a calculation
model that for interoperability purposes all users would follow.  But
it is up to an open-edi user community (as defined by ISO/IEC 14662 -
the UBL 2.1 specification) to create their open-edi configuration
with the expected calculation model.  You can see from diagram H.2
that the UBL specification provides the business objects and syntax,
but not the filling of the information bundles by the different roles
in different scenarios.

We on the committee have used that noun for a while now in UBL and
this page hasn't been updated in four years for want of groups to
document their calculation models for candidate users to choose from
(or to modify for their own uses):


Perhaps it is time to revive work on that page and revamp it to bring
it up to date.

. . . . . . . . Ken

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