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RE: [ontac-dev] Type vs. Class -- Please vote

To: "ONTAC Taxonomy-Ontology Development Discussion" <ontac-dev@xxxxxxxxxxxxxx>
From: "West, Matthew R SIPC-DFD/321" <matthew.west@xxxxxxxxx>
Date: Thu, 26 Jan 2006 10:11:23 -0000
Message-id: <A94B3B171A49A4448F0CEEB458AA661F02CE5339@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Dear Barry,    (01)

See below.    (02)


Regards    (03)

Matthew West
Reference Data Architecture and Standards Manager
Shell International Petroleum Company Limited
Shell Centre, London SE1 7NA, United Kingdom    (04)

Tel: +44 20 7934 4490 Mobile: +44 7796 336538
Email: matthew.west@xxxxxxxxx
http://www.shell.com
http://www.matthew-west.org.uk/    (05)



> >MW: But if you can cope with changing parts, what lead you 
> to consider
> >that a team was a type rather than an individual (an organisation of
> >some sort I would have said)?
> 
> I did not say that a football team was a type. I drew an analogy: 
> just as teams can gain and lose players, so types can gain 
> and lose instances.    (06)

MW: I must remember that trick. When someone asks for an example, give
them something that isn't, but is (sort of) similar, and then you can
side track them with a discussion of why it isn't an example.    (07)

MW: I'm beginning to wonder what it is you are trying to hide.
> 
> >MW: And of course I'm sill looking for an answer to the question of
> >why you need types whose members change over time.
> 
> Ever heard of Charles Darwin?    (08)

MW: Something about evolution which has lead to species being
specailised by clade. Dont't see what difference it makes. I still have
all the rabbits for all time (and if appropriate all their descendants).
I still don't need sets/classes/types/categories that change over time,
and you still haven't told me why you do.    (09)


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