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Semantic Elephants: Versioning, URIs, UniqueIds, owl:sameAs, Managing Coreference

From: Michael F Uschold <uschold@gmail.com>
Date: Mon, 3 May 2010 13:29:59 -0700
Message-ID: <m2w406b38b51005031329z4e1125a1x4c70e196a5db3740@mail.gmail.com>
To: public-lod@w3.org, semantic-web@w3.org
Cc: Aldo Gangemi <aldo.gangemi@gmail.com>, Sören Auer <auer@informatik.uni-leipzig.de>, Chris Bizer <chris@bizer.de>, Frank van Harmelen <Frank.van.Harmelen@cs.vu.nl>, Kingsley Idehen <kidehen@openlinksw.com>, "Fabian M. Suchanek" <f.m.suchanek@gmail.com>, Tim Berners-Lee <timbl@csail.mit.edu>, Jim Hendler <hendler@cs.rpi.edu>, Mark Greaves <MarkG@vulcan.com>, georgi.kobilarov@gmx.de, Jens Lehmann <lehmann@informatik.uni-leipzig.de>, Richard Cyganiak <richard@cyganiak.de>, Frederick Giasson <fred@fgiasson.com>, Michael Bergman <mike@mkbergman.com>, Conor Shankey <conor.shankey0@gmail.com>, Peter Ansell <ansell.peter@gmail.com>, Kendall Grant Clark <kendall@clarkparsia.com>, Peter Mika <pmika@yahoo-inc.com>, Ora Lassila <ora.lassila@nokia.com>, "Dr Jeff Z. Pan" <jeff.z.pan@abdn.ac.uk>, Sean Bechhofer <seanb@cs.man.ac.uk>, "Michael Lang(Jr.)" <michaelallenlang@gmail.com>, John Graybeal <graybeal@mbari.org>, tim.glover@bt.com, Dan Brickley <danbri@danbri.org>, dbooth@hp.com, Alan Ruttenberg <alanruttenberg@gmail.com>, wangxiao@musc.edu, asaegyn <asaegyn@gmail.com>

I analyzed some past threads and teased out and summarized three distinct
modeling issues.

   1. Overloading OWL
   sameAs is being used in the linked data community in a way that is
   inconsistent with its semantics
   2. Proliferation of URIs, Managing
   How to avoid or manage two negative consequences to the current
   proliferation of new URIs being minted for the same things. Specifically:
      1. it is hard to find when two things should be the same
      2. even if you can find the links, prolific use of owl:sameAs will
      create computational problems.
   3. Versioning and
   When and whether to make new URIs for different versions of things.

I added them to the Catalog of Modeling
Issues<http://ontologydesignpatterns.org/wiki/Community:Main>in the
Design Pattern Wiki <http://ontologydesignpatterns.org/wiki>.  Click on the
links for more details.

What is the Catalog of Modeling

Below is a bit of background on the history of this discussion.


PS The individuals in the CC: of this email were directly involved in the
original discussions.


In May 2008, I kicked off a discussion with the subject "A Semantic
Elephant" describing the unnecessary and costly proliferation of URIs and
owl:sameAs links. This discussion evolved to be mostly about managing
co-reference. Intitially private, this discussion was moved to the W3C
Semantic Web Discussion
List<http://lists.w3.org/Archives/Public/semantic-web/>at Tim
Berners-Lee's request. See: Managing
Co-reference (Was: A Semantic

The original discussion also evolved into a discussion about owl:sameAs per
se, which has been a recurring topic on various lists over the years. Aldo
Gangemi provided a concise summary on May 16,

In October 2008, I started a closely related discussion focused more on
challenges with Versioning and URIs. It was under the subject: URIs and
Unique IDs<http://lists.w3.org/Archives/Public/semantic-web/2008Oct/0192.html>.

>From all this, I teased out the three distinct but closely related modeling
isssues listed above. For each I created a detailed summary of the issues
and topics that were discussed
Received on Monday, 3 May 2010 20:30:36 UTC

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