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Re: OWL vs RDF

From: Jim Hendler <hendler@cs.umd.edu>
Date: Wed, 25 Oct 2006 15:28:49 -0400
Message-Id: <p06230903c1656b3c2634@[]>
To: Ivan Herman <ivan@w3.org>, Adrian Walker <adriandwalker@gmail.com>
Cc: Kerstin.L.Forsberg@astrazeneca.com, public-semweb-lifesci@w3.org

At 9:11 AM +0200 10/24/06, Ivan Herman wrote:
>HI Adrian & all,
>yes, I can see your point and indeed, if a rule system was around, it
>may do the trick in simple cases. Another (non-exclusive) approach is
>what I briefly mentioned at the F2F: is the development of a kind of an
>intermediate layer between RDFS and OWL; a layer that would allow some
>extra information to be added to the knowledge base without forcing the
>usage of a DL reasoner. There are several approaches for this, and we (I
>mean, W3C) may want to look into this more closely next year...

other than having a lot of trouble with Ivan's statement that implies 
that you need a DL reasoner to do anything useful with OWL (which is 
clearly untrue and not what he really meant to imply) I definitely 
agree with this :-)

>Adrian Walker wrote:
>>  Hi Ivan, Kerstin & All --
>>  A quick thought about "you are a perfectly decent Semantic Web citizen
>>  even if you do not use OWL".
>>  We have found that, even in rather simple cases, it's quite hard for a
>>  programmer to check that inferences over RDF are producing correct results.
>>  An approach that we have found useful is to reason over RDF using rules
>>  in executable, open vocabulary English.
>>  With this extra English semantics attached, we can have the system
>>  explain, in English, at the business or scientific level, how it derived
>>  a result.
>>  There's  a simple example at
>>  https://www.reengineeringllc.com/demo_agents/RDFQueryLangComparison1.agent
>>  You can view, edit, and run the example (and others) by pointing a
>>  browser to reengineeringllc.com <http://reengineeringllc.com> and
>>  selecting the example RDFQueryLangComparison1 .
>>  HTH,  -- Adrian
>>  Internet Business Logic (R)
>>  Executable open vocabulary English
>>  Online at www.reengineeringllc.com <http://www.reengineeringllc.com>
>>  Shared use is free
>>  Adrian Walker
>>  Reengineering
>>  Phone: USA 860 830 2085
>Ivan Herman, W3C Semantic Web Activity Lead
>URL: http://www.w3.org/People/Ivan/
>PGP Key: http://www.cwi.nl/%7Eivan/AboutMe/pgpkey.html
>FOAF: http://www.ivan-herman.net/foaf.rdf
>Content-Type: application/pgp-signature; name="signature.asc"
>Content-Description: OpenPGP digital signature
>Content-Disposition: attachment; filename="signature.asc"
>Attachment converted: OWL++:signature 530.asc (    /    ) (0011C9D4)

Prof James Hendler				hendler@cs.umd.edu
Dept of Computer Science			http://www.cs.umd.edu/~hendler
AV Williams Bldg				301-405-2696 (work)
Univ of Maryland				301-405-6707 (Fax)
College Park, MD 20853 USA
Received on Wednesday, 25 October 2006 19:29:54 UTC

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