I'm not sure what Conrad will talk about in his presentation.
However, there is an interesting prospect due to his expertise
with the PSL ontology he's working on at NIST:
http://www.mel.nist.gov/psl/index.html (01)
IMHO, PSL is a shining example of a superb formal ontology in the sense
that: (02)
1) it is modular (use the parts you need for an application or an
extension of PSL)
2) it is solid (it has an axiomatic theory that defines the semantics of
the ontology) (03)
These characteristics make PSL a very desirable ontology to use in practice;
unfortunately, it is not very clear how to do so for the average
ontology user.
In particular, I would be interested to hear what recommendations Conrad
could
make on the following topics: (04)
- PSL + Protege-OWL: has it been done? if not, are there some issues
still to be resolved to stay within OWL-DL for automated reasoning purposes? (05)
(e.g., I'm thinking of the problems that Patrick Cassidy had experienced
with SUMO & Protege 2
where he had to define a number of meta classes which made the resulting
ontology OWL-Full) (06)
- PSL & application-specific views of what is a process (07)
Depending on the level of abstraction and the scope of factors considered,
we can have multiple process models of the same conceptual "process"
phenomena.
In engineering, these variations are often due to domain-specific
perspectives
(e.g., thermal, mechanical, data processing, ...) about the same "thing"
(e.g., a spacecraft, a car, a toaster oven, apples & oranges,....) (08)
To retain the flexibility of using PSL according to considerations of
abstraction, scope, purpose, domain, ....
I reckon that the applicaiton-specific ontology needs to be mapped onto
the PSL ontology according to a reified context
that describes the choices made for abstraction, scope, purpose and domain. (09)
I'm not sure how to do this in practice however and if Conrad has ideas
on this, I would certainly like to hear what he has to say on this issue. (010)
-- Nicolas. (011)
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