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Re: proposal - Fragments redux (unifying the threads under Issues 75-80)

From: Jim Hendler <hendler@cs.rpi.edu>
Date: Sun, 2 Dec 2007 13:32:27 -0500
Message-Id: <E870B614-9741-415C-859C-0432AC596EE8@cs.rpi.edu>
Cc: Bernardo Cuenca Grau <bcg@cs.man.ac.uk>, OWL Working Group WG <public-owl-wg@w3.org>
To: Carsten Lutz <clu@tcs.inf.tu-dresden.de>
Carsten - can you justify the "many" in the statement "many people  
building real ontologies"  - I looked through a couple of the places  
where people have categorized ontologies, unfortunately none of them  
did it in terms of the specifics of EL++ so I couldn't determine.   
Currently, the vast majority found in the studies I cited earlier are  
OWL Full (although a lot of that is because they use rdfs:class) and  

On Nov 29, 2007, at 12:11 PM, Carsten Lutz wrote:

> On Thu, 29 Nov 2007, Jim Hendler wrote:
>> On Nov 29, 2007, at 2:44, Carsten Lutz <clu@tcs.inf.tu-dresden.de>  
>> wrote:
>>> On Wed, 28 Nov 2007, Jim Hendler wrote:
>>>> well, it's not so much motivated by computational properties,  
>>>> see out in the real world there's people who just implement fast  
>>>> engines and don't worry so much about the details...
>>> Sorry to object, but IHMO this approach is precisely why the  
>>> original
>>> OWL Lite was broken. And I understood we wanted to fix this?! We  
>>> should
>>> at least understand the computational properties of the fragments we
>>> are selecting.
>> IMO, its because we worried too much about theory that lite is  
>> broken, but thats neither here nor there. I never said computation  
>> wasn't a factor to be taken into account, but it's also not the  
>> only factor to be taken into account.
> This I never said.
>> We are not writing research papers here, we are trying to help  
>> people build real web apps!
> No doubts, we must have an eye on both. Which is why I pointed out
> that EL++ is both theoretically well-understood *and* already adopted
> by many people building real ontologies. :)
> greetings,
> 		Carsten
> --
> *      Carsten Lutz, Institut f"ur Theoretische Informatik, TU  
> Dresden       *
> *     Office phone:++49 351 46339171   mailto:lutz@tcs.inf.tu- 
> dresden.de     *

"If we knew what we were doing, it wouldn't be called research, would  
it?." - Albert Einstein

Prof James Hendler				http://www.cs.rpi.edu/~hendler
Tetherless World Constellation Chair
Computer Science Dept
Rensselaer Polytechnic Institute, Troy NY 12180

Received on Sunday, 2 December 2007 18:33:10 UTC

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