[Data-modeling] Modeling numeric uncertainties

[Bryan Cheung]

Cross post from dev list:

http://lists.freebase.com/pipermail/developers/2009-April/002782.html
https://bugs.freebase.com/browse/DA-636


On Apr 8, 2009, at 11:17 AM, Jeff Prucher wrote:

> There's an open task to modify the schemata for chemical elements to  
> allow
> for a data load, and one of the issues is that values like atomic  
> mass are
> almost always given with a degree of uncertainty. The question is  
> how to
> account for this in the model. The current suggestion is to use a  
> CVT, with
> two properties: one for the base value, and one for the degree of
> uncertainty (+/-); both measured in the same unit.
>
> See the property "atomic weight (new style)" on sandbox:
> https://www.sandbox-freebase.com/view/en/thorium
>
> What do you think of this approach?
>
> Thanks,
> Jeff
>
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