[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Invoices (was Re: XML's greatest culturaladvanta
Well with some business-transaction documents such as invoices there is a calculation model which is very important to get right when processing the document. The processing application (code)
has to know which entities are important components of the calculation and which are not. If there are no variations to the schema (or more specifically to the structure and semantics) the
calculation model is clear. Having a situation where there are no variations which could impact the calculation model is extremely optimistic when there are many parties involved, especially when
there are multiple countries and accounting and tax systems involved. So having a way to always be certain whether a strange entity is relevant to the calculation model is important to allow
reliable calculations even in a non-homogenous scenario where there are multiple variations, some known, some unknown (such as new versions and unfamiliar customisations or even variations
in the use of the same schema)... And that's a simplification. ---- Stephen D Green On 10 April 2013 16:43, John Cowan <johnwcowan@gmail.com> wrote:
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