Re: meta-information about assertions

Hi Cristiano,

as Steffen already said, using the Named Graph data model together with 
SPARQL is a  practical and well tested way for doing this.

Reification is considered dead by most people working on Semantic Web-based 
data integration. I think the only people still thinking about using 
reification are the new OWL working group and I hope that they will also 
realize at some point that they are running into problems with this.

If you need a vocabulary for representing meta-information about graphs, one 
option is to use the Semantic Web Publishing vocabulary. A framework that 
might be interesting for you with regards to trust is the WIQA Web 
Information Quality Assessment framework, which employs the Named Graphs 
data model and allows you to formulate various information filtering 
policies using a policy language that is based on SPARQL.

See:

http://www4.wiwiss.fu-berlin.de/bizer/WIQA/index.htm
http://www4.wiwiss.fu-berlin.de/bizer/WIQA/browser/index.htm

Cheers

Chris


--
Chris Bizer
Freie Universität Berlin
+49 30 838 54057
chris@bizer.de
www.bizer.de
----- Original Message ----- 
From: "Steffen Staab" <staab@uni-koblenz.de>
To: "Cristiano Longo" <cristiano_longo@yahoo.it>
Cc: <semantic-web@w3.org>
Sent: Tuesday, March 04, 2008 9:13 AM
Subject: Re: meta-information about assertions


> Hi,
>
> here is a WWW08 paper about this:
> http://www.uni-koblenz.de/~staab/Research/Publications/2008/WWW2008-MetaKnowledge.pdf
> and here is its implementation:
> http://www.uni-koblenz.de/FB4/Institutes/IFI/AGStaab/Research/MetaKnowledge
>
> Cheers,
> Steffen
>
> Cristiano Longo schrieb:
>> Hi all,
>> i'm trying to merge rdf(more specifically OWL) graphs
>> from different sources using collaborative filtering
>> and trust related technologies. But my question is:
>> what is the proper way to encode a "meta assertion"
>> like "A says X about B", in order to deal with
>> contraddictory assertions?
>>
>> Reification? Using SKOS? Something else?
>>
>> Thank you in advance.
>>
>>
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>

Received on Tuesday, 4 March 2008 08:50:16 UTC