reproducible, & possibly configurable rounding

[Jim Garrison]

On 05/07/2014 04:01 PM, Bradley M. Kuhn wrote:
> I originally characterized Tripun's project as a "implement fixed point
> arithmetic"; which I naïvely thought was the "only way to handle the
> rounding problem properly".  I've since been educated: there is more
> than one way to get this done right, and I think the way we're leaning
> is to clearly document options, why we picked the option we did, and
> (ideally) make Ledger-CLI more configurable on this point by the user.

I am still confused as to what the other ways of handling (or rather,
avoiding) rounding might be.  Can we not assume that any given
commodity/currency is traded in some minimum fractional unit?