Need to differentiate financial rounding versus retail rounding
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Canada recently decided to nickel round for tendered cash transactions but not all other transactions.
http://www.mint.ca/store/mint/learn/eliminating-the-penny-6900002
The Swiss Franc already does this, but the CLDR data only handles tendered cash rounding. CLDR should differentiate between these two types of rounding.
For the currency data, we should have something like the following:
<info iso4217="CAD" digits="2" rounding="0" tenderedRounding="5"/>
<info iso4217="CHF" digits="2" rounding="0" tenderedRounding="5"/>
Instead of tenderedRounding, we could have tenderRounding, retailRounding or cashRounding as the attribute name. I recommend using the tenderedRounding because the supplemental data uses the tender="false" flag in similar situations.
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Trac Comment 5 by —2013-01-09T21:00:19.975Z
Suggest 2 changes.
1.
<info iso4217="CAD" digits="2" rounding="0" cashRounding="5"/>
<info iso4217="CHF" digits="2" rounding="0" cashRounding="5"/>
cash, just because that is the primary environment where it is needed (where there is no coin), while it is ok in checks, credit cards, bank transfers, etc.
2. IF (and only if) we find evidence that we really need different rounding on a per country basis, add these 3 attributes to the regional currency info, to allow overrides. That would look like the following:
<region iso3166="CH">
<currency iso4217="CHF" from="1799-03-17" digits="2" rounding="0" cashRounding="5"/>
...
</region>
Trac Comment 6 by —2013-01-09T21:38:43.159Z
I like the proposal from Mark.
Trac Comment 5.7 by kent.karlsson14@0885cc00c95d6cd9—2013-01-09T22:10:41.826Z
Replying to (Comment 5 mark):
2. IF (and only if) we find evidence that we really need different rounding on a per country basis, add these 3 attributes to the regional currency info, to allow overrides. That would look like the following:
<region iso3166="CH">
<currency iso4217="CHF" from="1799-03-17" digits="2" rounding="0" cashRounding="5"/>
...
</region>
One could indeed have the 'from' and 'to' dates apply to the (cash) rounding rule as well, having several 'currency' tags for the same country and currency. Note that the cash rounding rule changes over time for the same currency, as small-value coins are dropped. Indeed, I'd suggest having this data per country only, and drop (deprecate) the 'info' tag mentioned in point 1.
Trac Comment 9 by —2013-02-04T16:16:56.134Z
Checked in a fix. Only changed CHF and CAD for now. However, the mechanism is in place to have country-specific overrides if someone can take the time to figure out for a significant set:
a. Where a country shares a currency, but has different rounding rules.
b. Where rounding rules have changed over time.
That should go into a different bug, though.
Trac Comment 11 by —2014-04-22T20:37:44.756Z
Milestone 23dres deleted
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