In the sense of IANAL I say: IANAE. But. (01)
Patrick Cassidy wrote:
> It is an exaggeration to say that modeling a currency unit requires
> elaborate modeling of everything related. There are multiple currency
> units, and between them there are exchange rates (which change daily)
Nope. More often than that. And not at all for some currencies (e.g. french
franc and euro).
> , and
> any number x times the base unit is indeed x multiples of the base unit, and
> the way one 'measures' or 'standardizes' the base unit is as its value on
> any given day
..and location and time [think of germany in the late 1920s] (02)
> versus some one or more other freely exchangeable currency
> units,
not necessarily. Sometimes it's just an abstract value of some debt whose
value is not exact at all. (03)
>
and one may also use the price of gold (on an open market without
> restrictions) as a measure of value. (04)
But the round-trip of exchange currency A to B buy gold for B and sell for A
will give you [often enough] a different value than exchange A to B to A even
if you do it all in zero-time [wonders of arbitrage/location] (05)
> (... rest cut ...) (06)
See, as I say, I am not an expert. But without thinking I can see so many
problems in it already. As I said in my previous mail, get some domain experts
and do it right if you prefer to, we [unitsml] chose not to and if you
[ontolog uom's] decide to do so I see the issue becoming much more complex
[imo]. "Enjoy" aka "good luck". (07)
-Martin (08)
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