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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Dagobert Soergel
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University of Maryland
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