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HI -
I took your name off the ontac-forum list, which was
the main discussion list.
At present I do not have any routine for periodic
messages to people not on the discussion list, but will probably create such a
list if there is any demand. Would you want periodic updates on
progress?
I do hope that those at NASA who have been
developing ontologies will keep in touch, as we need input from a wide range of
communities in order to build a common semantic model that will be able
to represent all of the activities within the federal
government.
Pat
Patrick Cassidy
MITRE Corporation
260 Industrial
Way
Eatontown, NJ 07724
Mail Stop: MNJE
Phone: 732-578-6340
Cell:
908-565-4053
Fax: 732-578-6012
Email:
pcassidy@xxxxxxxxx
Hate to be a party pooper but could you all take me off this "reply
all" string. The email traffic on it is untenable for
me.
thanks,
jp
At 10:35 AM 10/15/2005,
Peterson, Eric wrote:
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The only way that ontologies can form a
lattice is when they depend and build upon one another like Ontolingua or
Cyc microtheories. If we were to take the existing upper ontologies,
they would form a *completely* flat lattice because they are not
monotonic variants of one another. I go into this in more detail if
you do a search in the SUO archives. So to me the alternative to a hub
is not a lattice, but rather a simple collection of
ontologies.
Perhaps the lattice that Dr. Sowa was referring to
is the one that forms between individual entities of the various ontologies
once that mapping begins in
earnest.
Best,
-Eric
From:
ontac-forum-bounces@xxxxxxxxxxxxxx [mailto:ontac-forum-bounces@xxxxxxxxxxxxxx] On Behalf
Of Dagobert Soergel
Sent: Monday, October 10, 2005 11:47
PM
To: ONTAC-WG General Discussion
Subject: Re:
[ontac-forum] COSMO (upper model) Technical Kick off
I do not believe that starting from
one ontology is a good idea. No one ontology can serve as a hub.
That requires something like the "lattice" John Sowa talks about. That
lattice must be built by starting from a number of ontologies and
successively incorporating more.
On another note, it would be helpful
if someone could provide an example of what the COSMO would look like.
This would not need to be comprehensive or necessarily the best structure,
just illustrate the format of what is to be built.
DS
At
10/10/2005 09:19 PM, you wrote:
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Hi folks;
This growing list
of support is exciting!
I'm going to exercise the prerogative,
which Pat assigned me as COSMO lead, to dispense with formalities and diving
right into our business. To that end, I’ve included a
straw-person process for evolving toward a common semantic model. This
is meant strictly as a starting point for discussion.
The
straw-person is an attempt to incorporate lessons learned from the Standard
Upper Ontology (SUO) effort while offering:
· short term
usable results,
· respect for
and use of existing formal ontological artifacts, and
· incremental
sound formal results.
This approach, I think, includes the key elements that Dr.
Sowa asked for in the SUO framework and provides a staging of effort and
results that assumes modest amount of effort on our parts. It also
addresses Pat’s desire to be inclusive of the European
efforts.
The suggesting steps are as
follows:
1. Choose
an existing ontology as the initial embodiment of an ontology integration
hub to which other ontologies will be mapped
a.
Agree on a set of metrics for selection of the ontology integration
hub
i. Metrics must be easily
collectable
b. Agree on candidates for the selection
process
c. Score candidate ontologies according to
metrics – the high scoring upper ontology will become the initial ontology
integration hub
2. Release this ontology as-is as the initial
COSMO ontology
3. Address key short-falls of the hub
ontology
a. Maintain a prioritized list of
issues
b. Agree on resolution as time and interest
dictate
4. Map the structural axioms (ground atomic
formulae) of the remaining candidate ontologies to the ontology integration
hub
a. This process proceeds opportunistically as
our personal and project time allows
b. Push out yearly
major releases based on achievement of yearly goals
c.
This step runs concurrently with step three
5.
Map the remaining axioms of the remaining candidate ontologies to the
ontology integration hub
a. As desired, such
free-form axioms can be added in steps three and four
Please excuse the
roughness. My other tasks beckon.
I look forward
suggestions.
Best!
Eric
Peterson
Chief Ontologist
McDonald Bradley
Inc.
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