Re: [ubl-dev] Representation of a measurement as a fraction

[Graham Leggett <minfrin@sharp.fm>]

On 20 Jan 2010, at 9:41 PM, Tim McGrath wrote:

> i think the important point is that the numerics carried in these  
> documents are used not generally used for arithmetic.  when someone  
> orders 1/3 of an inch of something or 5/16 of a pint these are  
> effectively  text (ie presentation).  I am not sure I have seen a  
> case in EDI or UBL for actually knowing that 1/4 is really the same  
> as 0.25  or that 1/3 is a bit more than 1.333 or for knowing two  
> times 1/6 is 1/3 etc...
>
> Perhaps we need a use case for the problem statement?

In cross currency transactions, you might pay X Euros for Y dollars,  
and these need to be expressed as fractions to be accurate.

Right now, the remittance advice specifies a source currency, and an  
approximation of the rate in rounded off decimal. If a credit card  
payment gateway settles a transaction in currency X, but is paid in  
currency Y, this cannot currently be represented accurately using a  
remittance advice.

Regards,
Graham
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