Hi Peter: (01)
Please count me in for the session. (02)
Some other types of measure not readily convertible into SI units, but which
need to be dealt with are: "pack", "carload", "boxcar", "bolt" (of cloth). (03)
Gerry Radack (04)
-----Original Message-----
From: ontology-summit-bounces@xxxxxxxxxxxxxxxx
[mailto:ontology-summit-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Pat Hayes
Sent: Monday, June 01, 2009 3:07 PM
To: Ontology Summit 2009; Gunther Schadow
Cc: Forest Lin; Conrad Bock
Subject: Re: [ontology-summit] Progressing a Units Ontology - virtual session (05)
On Jun 1, 2009, at 7:51 AM, Gunther Schadow wrote: (06)
> Mike Bennett wrote:
>> Hi Peter,
>>
>> I would love to participate in this session.
>>
>> In particular I want to ensure that the concept of units is broad
>> enough
>> to cover uses outside of the physical measurement domain. For example
>> currencies are also a unit of measure.
>
> Actually, I think currencies are not unit of measure because
> they lack one important property, and that it they do not have
> a fixed magnitude relative to other units of the same kind
> of quantity. (07)
There may be an analogy with 'sea level' which is not a level, since
it varies by both location and time, and has no precise value even at
a given time and place. Yet it is of great value in all kinds of
applications. As a result, 'standard' virtual sea levels have been
defined, based on various models of a more perfect Earth. (I believe
there are at least three: the US, the European,and the Australasian,
which all differ subtly.) We may be obliged to do something similar
for monetary value, ie define an artificial 'absolute economic value'
and punt on the task of relating actual values to it, leaving that
necessary but ugly task to the appropriate engineers. (08)
Pat (09)
>
> Commensurability and magnitude are critical properties to take
> care of.
>
> regards,
> -Gunther
>
>
>
> --
> Gunther Schadow, M.D., Ph.D. gschadow@xxxxxxxxxxxxxxx
> Associate Professor Indiana University School of Informatics
> Regenstrief Institute, Inc. Indiana University School of Medicine
> tel:1(317)423-5521 http://aurora.regenstrief.org
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