OK, we'll have US:meter owl:sameAs UK:metre (01)
(I thought I was making a pretty big concession converting the entire US
economy to metric, you expect me to spell everything right too? :)) (02)
> -----Original Message-----
> From: uom-ontology-std-bounces@xxxxxxxxxxxxxxxx [mailto:uom-ontology-
> std-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Matthew West
> Sent: Saturday, July 18, 2009 2:10 PM
> To: 'uom-ontology-std'
> Subject: Re: [uom-ontology-std] retitled: magnitude of a quantity
>
> Dear David,
>
> > Well stated. I think it's key to layer these ontologies. If I could
> > restate and add one, starting from the lowest working up, I think we
> > need:
> >
> > 1) Values with Units (this is the very basic ontology that just
> allows
> > us to say "3 meters")
>
> [MW] Of course everyone (well at least most people) outside the US will
> want
> to say "3 metres" and have it understood as the same thing :-)
>
> Regards
>
> Matthew West
> Information Junction
> Tel: +44 560 302 3685
> Mobile: +44 750 3385279
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>
>
> > 2) The measurement event (this just adds the temporal dimension, and
> > recognizes that there is an event for the measurement)
> > 3) The measurement method
> > 4) The thing being measured
> >
> > Each can be underspecified at the lower level (i.e. I could have a
> > measurement event at level 2 and say it's measuring "blood pressure"
> (a
> > literal) without having a complete ontology about what blood pressure
> > is (at level 4)
> >
> > And as I think you were suggesting to make progress let's focus on
> > level 1
> >
> > > -----Original Message-----
> > > From: uom-ontology-std-bounces@xxxxxxxxxxxxxxxx [mailto:uom-
> ontology-
> > > std-bounces@xxxxxxxxxxxxxxxx] On Behalf Of John Graybeal
> > > Sent: Friday, July 17, 2009 4:32 PM
> > > To: uom-ontology-std
> > > Subject: Re: [uom-ontology-std] retitled: magnitude of a quantity
> > >
> > > On Jul 16, 2009, at 3:56 PM, David Leal wrote:
> > >
> > > > This introduces a larger point which we have only just touched
> > upon,
> > > > which is how these domain specific, and often measurement method
> > > > specific categories are included in the ontology.
> > >
> > >
> > > To make sure I understand this point, allow me to start with an
> > > example.
> > >
> > > In dealing with measurements of things like chlorophyll, Roy Lowry
> > and
> > > his team at BODC/NERC have come up with extensive vocabularies that
> > > take into account the mechanism by which a measurement was made (by
> > > evaporation, by 10um filtration, by 100um filtration, by in-situ
> > > reflectance, ...). The theory is that for the measurements to be
> > > comparable, the technique has to be known and comparable (if not
> > > identical).
> > >
> > > On the one hand, I firmly believe (a) it is important to track
> > > provenance of measurements, and (b) it is important to be able to
> > > document the measurement mechanism supported by a given device. So
> I
> > > understand that descriptives about the measurement technique belong
> > > in, say, a device ontology, or a description of the data set.
> > >
> > > On the other hand, they seem clearly orthogonal to the question of
> > > describing what is being measured (e.g., chlorophyll), and in turn
> > > even further from the units used to quantify the measurement
> (grams,
> > > or liters, or whatever). I don't think our ontology has to qualify
> > > what the units apply to, on the theory that an ounce is somehow a
> > > different quantify when applied to gold and lead.
> > >
> > > So now I'm thinking that you mean something else. Can you provide
> > > some specific examples?
> > >
> > > John
> > >
> > > --------------
> > > John Graybeal <mailto:graybeal@xxxxxxxxx> -- 831-775-1956
> > > Monterey Bay Aquarium Research Institute
> > > Marine Metadata Interoperability Project: http://marinemetadata.org
> > >
> > >
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