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Re: Profiles intro

From: Carsten Lutz <clu@tcs.inf.tu-dresden.de>
Date: Wed, 09 Apr 2008 22:29:54 +0200 (CEST)
To: Alan Wu <alan.wu@oracle.com>
Cc: Michael Schneider <schneid@fzi.de>, OWL Working Group WG <public-owl-wg@w3.org>
Message-id: <Pine.LNX.4.64.0804092225310.9109@frege.inf.tu-dresden.de>
On Wed, 9 Apr 2008, Alan Wu wrote:
>
> Hi,
>
> Like your suggestions! :)   I personally take 3) very seriously. In my 
> opinion, reasoning is seldom the ultimate goal when users build a semantic 
> application. It is the efficient query execution against large amount of 
> semantic data that adds a lot of value.

It seems that here is an interesting difference in our use of the work
"reasoning". For me, "query executing against semantic data" *is* (a
kind of) reasoning because you do more then just retrieving data: your
rules make implicit information explicit, i.e., you derive answers
that were not explicitly put into the database.

Anyway, it is of course fine with me to put querying more explicitly
into the profile intro.

greetings,
 		Carsten


> A few major motivations/design principles for OWL2 R as I see it.
> - expressive & highly scalable
> - easily understandable set of rules
> - friendly to triple oriented technology
> - allows rules-based forward chaining  [your point 2)]
> - allows efficient query execution [your point 3)]
>
> I need a bit more time to merge them into one of two sentences.
>
> Thanks,
>
> Zhe
>
> Michael Schneider wrote:
>> Carsten Lutz wrote:
>>
>> 
>>> PS: Zhe: can you provide a one-liner describing the most typical scenario
>>>     for OWL-R? We are clearly not restricted to a one-liner in our
>>>     documents, but it would help to understand your view.
>>> 
>> 
>> Michael here! Perhaps something like:
>>
>>   1) Sporadically and incrementally specifying semantics for only certain
>> parts of the vocabulary used within existing RDF data.
>>
>>   2) Creating (not-necessarily complete) inference graphs from such RDF 
>> data
>> by performing rulebased forward chaining, which is based on the semantics
>> that have been specified earlier.
>>
>>   3) Efficiently querying the resulting inference RDF graph with SPARQL.
>> 
>> But I don't know how to make a "one-liner" out of this. ;-)
>> 
>> Cheers,
>> Michael
>> 
>> --
>> Dipl.-Inform. Michael Schneider
>> FZI Forschungszentrum Informatik Karlsruhe
>> Abtl. Information Process Engineering (IPE)
>> Tel  : +49-721-9654-726
>> Fax  : +49-721-9654-727
>> Email: Michael.Schneider@fzi.de
>> Web  : http://www.fzi.de/ipe/eng/mitarbeiter.php?id=555
>> 
>> FZI Forschungszentrum Informatik an der Universität Karlsruhe
>> Haid-und-Neu-Str. 10-14, D-76131 Karlsruhe
>> Tel.: +49-721-9654-0, Fax: +49-721-9654-959
>> Stiftung des bürgerlichen Rechts
>> Az: 14-0563.1 Regierungspräsidium Karlsruhe
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>> Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus
>> 
>
>

--
*      Carsten Lutz, Institut f"ur Theoretische Informatik, TU Dresden       *
*     Office phone:++49 351 46339171   mailto:lutz@tcs.inf.tu-dresden.de     *
Received on Wednesday, 9 April 2008 20:30:42 GMT

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