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Re: feedback on Easy keys and universal property

From: Rinke Hoekstra <hoekstra@uva.nl>
Date: Fri, 25 Apr 2008 18:38:35 +0200
Cc: OWL Working Group WG <public-owl-wg@w3.org>
Message-Id: <E356D33F-8070-4F1B-A02B-286AE4D63310@uva.nl>
To: Alan Wu <alan.wu@oracle.com>

Hi Zhe,

I personally found Markus' paper "All Elephants are bigger than all  
Mice" [1] a pretty convincing use case. Also, his work on SROIQ-Rules  
and ELP is based on the availability of the top role.

Best,
	Rinke

[1] http://www.korrekt.org/page/All_Elephants_are_Bigger_than_All_Mice


On 25 apr 2008, at 18:05, Alan Wu wrote:
> Hi,
>
> Forgot to copy the WG.
>
> Zhe
>
> From: Alan Wu <alan.wu@oracle.com>
> Date: 24 april 2008 22:54:39 GMT+02:00
> To: Alan Ruttenberg <alanruttenberg@gmail.com>
> Cc: Ian Horrocks <ian.horrocks@comlab.ox.ac.uk>
> Subject: Re: Easy keys and universal property - feedback needed
>
>
> Alan,
>
> Easy keys seems to be very practical. Oracle is likely to implement  
> this feature. Don't take it as a promise though :)
>
> Regarding "easiest keys", the counterintuitive case is valid.  
> However, is that a common case? ;)  Do we truly expect
> many users define things  like that?
>
> Regarding top/bottom role, I am not totally convinced yet. Could  
> someone please describe some practical use cases?
>
> Thanks,
>
> Zhe
>
> Alan Ruttenberg wrote:
>> Hi Zhe,
>>
>> At yesterday's meeting the sentiment of those present was that it  
>> was desirable to move forward with adding easy keys and top/bottom  
>> property. As one a representative of a reasoner implementation, we  
>> need your feedback about whether you concur that these features  
>> should be added to the specification. Could you please carefully  
>> review the easy keys proposal at http://www.w3.org/2007/OWL/wiki/Easy_Keys 
>>  with particular attention to the the section "Why not easiest  
>> keys?" and get back to the group with your thoughts on this matter  
>> and with an indication if it is likely that Oracle would implement  
>> this feature? Similarly, the top and bottom property, as described  
>> in http://www.w3.org/2007/OWL/wiki/Universal_Property.
>>
>> Thanks,
>> Alan
>>
>
>
>

-----------------------------------------------
Drs. Rinke Hoekstra

Email: hoekstra@uva.nl    Skype:  rinkehoekstra
Phone: +31-20-5253499     Fax:   +31-20-5253495
Web:   http://www.leibnizcenter.org/users/rinke

Leibniz Center for Law,          Faculty of Law
University of Amsterdam,            PO Box 1030
1000 BA  Amsterdam,             The Netherlands
-----------------------------------------------
Received on Friday, 25 April 2008 16:39:19 GMT

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