On 19/12/12 12:23, Daniel Kinzler wrote:
On 19.12.2012 08:34, Nikola Smolenski wrote:
What I wanted to say. Additionally, in some cases historical units are not
accurate or accurately known, so possibly we won't even be able to make the
conversion.
I don't think we can sensibly support historical units with unknown conversions,
because they cannot be compared directly to SI units. So, they couldn't be used
to answer queries, can't be converted for display, etc - they arn't units in any
sense the software can understand. This is a solvable problem, but would add a
tremendous amount of complexity.
Ah, but they could still be meaningfully compared to each other. And if
approximate conversion is known, this could be still be used to make the
conversion so that the measure is converted and its uncertainty increased.
Just throwing more info here: there might also be cases where we could
have multiple competing conversions. Somewhat similar to units,
something that I would very much like to see is comparison of various
monetary values, adjusted for inflation or exchange rate. But then you
would have various estimates of inflation by various bodies and you
might want to compare by either of them (or a combination of them?).
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