OK, reading back through the email trail, I think I now understand
your point (and your frustration). And for the record, I agree, we do
need kinds of quantities. And no, we are not obliged to define them.
And while UCUM and VIM are clearly based on different philosophies, I
think they are technically consistent. UCUM talks of units and nothing
else, and we can keep that purity within a larger ontology while not
allowing the ~UCUM~ equivalences to have poisonous consequences
elsewhere. (01)
Pat (02)
On Sep 28, 2009, at 9:44 AM, Pat Hayes wrote: (03)
> Martin, you clearly feel strongly about something. However, I have no
> idea what it is, or what your point is in the message.
>
> Pat
>
> On Sep 26, 2009, at 6:51 PM, Weber, Martin S. wrote:
>
>>> Pat Hayes:
>>> Um... as I recall from the telecon presentation, UCUM treats angle
>>> as
>>> a physical dimension, so this entire debate is beside the point.
>>> There
>>> is a *unit* distinction between angle and count; angle is not
>>> dimensionless in UCUM. Very sensible move.
>>
>> Uh well, reading the semantics of UCUM IIUC angle and count are
>> different units but they are not different dimensions. About them
>> being different units and thus the debate being beside the point:
>> Don't be so difficult :D If you prefer it, then let's talk about
>> newton-meter
>> vs. newton-meter. Oh. Am I talking about two different things here?
>> Do I need a (kind of, +) quantity here? When you're done redefining
>> physics, metrology, and the VIM, reknitted the SI, abolished some
>> units of measure in use, and introduced others, ... someone
>> will tell me whether I'm talking about torque or something different.
>>
>> I'm sorry guys, but sometimes I get the impression you wanna tackle
>> the world and not creating a standard ontology for units of measure
>> and their necessary related concepts. Do you expect all the users of
>> the ontology understand all of the underlying concepts?
>>
>> Regards,
>>
>> -Martin
>>
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