Re: OWL vs RDF

Jim Hendler wrote:
> 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...
>>
>> Ivan
>>
> 
> 
> 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 stand corrected:-) It was a bit misunderstandable indeed

I.

 I definitely agree
> with this :-)
>  -JH
> 
>> 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
>>
>>
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> 
> 

-- 

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