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At 9:50 AM +0000 3/17/08, Barker, Sean (UK) wrote:
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Pat, Jeffery
I was using the principle (from
linear vector spaces) that a dimension is an independent
specifier, and so would describe a pointing finger as a five
dimensional object in a 3D space. The point here being, not
whether to use a 3 or 4 D ontology, but what actually
is meant by dimension.
Ah, OK. I was using it (here) in the sense of a physical
dimension. In the more abstract sense, we probably need hundreds or
thousands of dimensions; but Im not sure that is much more than an
analogy, as the 'cognitive space' isn't really a space in any obvious
mathematical sense.
Pat
Sean Barker
BAE SYSTEMS - Advanced Technology Centre
Bristol, UK
+44(0) 117 302 8184
BAE Systems (Operations) Limited
Registered Office: Warwick House, PO Box 87, Farnborough Aerospace
Centre, Farnborough, Hants, GU14 6YU, UK
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From: Pat Hayes
[mailto:phayes@xxxxxxx]
Sent: 13 March 2008 17:11
To: Barker, Sean (UK)
Cc: [ontolog-forum]
Subject: RE: [ontolog-forum] Ontology similarity and accurate
communication
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At 3:25 PM +0000 3/13/08, Barker, Sean (UK) wrote:
This mail is publicly
posted to a distribution list as part of a process of public
discussion, any automatically generated statements to the contrary
non-withstanding. It is the opinion of the author, and does not
represent an official company view.
A wide
variety of schedules depend on two independent variables - e.g. change
oil every 10,000 miles or six months - so do we need a 5-D
system?
No, these are the same dimension. What makes this
tricky is the "or" in there.
Pat
Sean Barker
BAE SYSTEMS - Advanced Technology Centre
Bristol, UK
+44(0) 117 302 8184
BAE Systems (Operations) Limited
Registered Office: Warwick House, PO Box 87, Farnborough Aerospace
Centre, Farnborough, Hants, GU14 6YU, UK
Registered in England & Wales No: 1996687
From:
ontolog-forum-bounces@xxxxxxxxxxxxxxxx
[mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx] On Behalf Of
Pat Hayes
Sent: 13 March 2008 14:58
To: [ontolog-forum]
Subject: Re: [ontolog-forum] Ontology similarity and accurate
communication
I'd like to hear any arguments to the
contrary, but I doubt that
a strong case can be made that a 4D ontology is a requirement for
those applications.
Probably not for simple schedules, indeed. But for a
maintenance scheduler you might well need it, when parts need to be
checked according to the time they have have been in actual use, for
example. Im sure Matthew has examples.
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