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RE: [ontac-forum] Upper ontology / common semantic model

To: ONTAC-WG General Discussion <ontac-forum@xxxxxxxxxxxxxx>
From: Dagobert Soergel <dsoergel@xxxxxxx>
Date: Sun, 09 Oct 2005 20:09:32 -0400
Message-id: <6.2.5.6.2.20051009195907.04af02d0@xxxxxxx>
The steps I outlined could certainly applied to any subset of upper level ontologies.  We start with those that are of particular relevance to Federal government.

There is also a question of whether we should focus on
  • entity types (called semantic types in the UMLS-SN)
  • relationship types
  • subject fields/disciplines and their upper subdivisions or facets
I do not mean to imply that these are mutually exclusive, they are just pragmatic divisions.  The CYC upper ontology mixes all three.

Having directed a dissertation applying the UMLS-SN, I can only agree with Barry.  My student made a number of suggestions.

DS


At 10/9/2005 07:06 PM, Barry Smith wrote:
As Olivier will confirm, there are many things wrong with the UMLS-SN, which is why an effort is currently on-going to rebuild it.
BS

At 06:30 PM 10/9/2005, Cassidy, Patrick J. wrote:
Dagobert,
   That looks like an excellent summary of a methodology to find
commonality among the existing UOs.
   I mentioned in a previous note that I though that it might be
helpful to focus initially on that part of existing UOs required to
formalize and relate several existing Knowledge Classifications such as
the UMLS-SN, FEA-RMO top level, and DoD Core Taxonomy top level.  Do
you view such a focus as consistent with the overall plan you describe?

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


-----Original Message-----
From: ontac-forum-bounces@xxxxxxxxxxxxxx
[ mailto:ontac-forum-bounces@xxxxxxxxxxxxxx] On Behalf Of Dagobert
Soergel
Sent: Sunday, October 09, 2005 3:19 PM
To: ontac-forum@xxxxxxxxxxxxxx
Subject: [ontac-forum] Upper ontology / common semantic model

I am separating out this part of the thread.
I apologize if some of this is obvious.  It is often "hard to
understand what is understood".

This is a suggested plan of work for the upper ontology subgroup

1       Collect suggested upper ontologies

2       Compare and determine differences
2.1             In elements (presence / absence and, more difficult,
definition)
2.2             in relationships

3       Try to resolve differences, creating a superstructure that
incorporates
         the non-contradictory parts of various schemes
3.1             By adding elements
3.2             By adding relationships

4       Articulate the remaining differences so that they are clearly
understood

In addition, the subgroup should deal with ontologies that can be
reused in many contexts, such as an ontology of time concepts.

My reworking of the WordNet top level (attached) may be useful in this
context.

DS


Dagobert Soergel
College of Information Studies
University of Maryland
4105 Hornbake Library
College Park, MD 20742-4345
Office: 301-405-2037     Home:  703-823-2840        Mobile:
703-585-2840
OFax:   301-314-9145        HFax: 703-823-6427
dsoergel@xxxxxxx     www.dsoergel.com

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Dagobert Soergel
College of Information Studies
University of Maryland
4105 Hornbake Library
College Park, MD 20742-4345
Office: 301-405-2037     Home:  703-823-2840        Mobile: 703-585-2840
OFax:   301-314-9145        HFax: 703-823-6427
dsoergel@xxxxxxx     www.dsoergel.com


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