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Re: comment on RIF Working Drafts

From: Chris Welty <cawelty@gmail.com>
Date: Fri, 28 Aug 2009 09:37:40 -0400
Message-ID: <4A97DDA4.406@gmail.com>
To: Georg Lausen <lausen@informatik.uni-freiburg.de>
CC: public-rif-comments@w3.org

Hi Georg,

Thank you for the feedback!


Georg Lausen wrote:
> Hi,
> I am the head of the Database and Information Systems group at the 
> University of Freiburg in Germany. We have been working with rule 
> technologies since many years. We have been implementing full F-Logic 
> and applied the resulting Florid system for data integration, web data 
> extraction and for the implementation of workflows. We have learned that 
> specifying rules with a certain semantics in mind and to evaluate them 
> is not the same thing.  One has to observe that rule engines may have 
> subtle differences in semantics even when syntax is identical. What has 
> been missing for all the years is a layer of neutralization which makes 
> it possible to clearly decide on the semantics of rule programs with 
> respect to different rule languages and rule systems.
> I am now glad to see that the RIF initiative was successful to fill 
> exactly this gap. They cover the whole range of rule languages between 
> those having a foundation in mathematical logic and those being based on 
> the production rule paradigm. The evolution of the semantic web is given 
> profound attention by clarifying the compatibility between ontologies 
> based on RDF and OWL on one side and rule languages on the other.
> I expect that the RIF Framework for Logic Dialects (RIF FLD) will 
> amplify recent efforts on the integration of languages based on OWL 
> using open world semantics with deductive rule languages using closed 
> world semantics, as well as the efforts of the development of a logical 
> basis for production rule languages. We are now motivated to investigate 
> ways to built a rule language on top of SPARQL. I am convinced that RIF 
> FLD will give us the needed framework to start.
> The RIF working group is doing a great job and I wish them all the 
> necessary support they need to continue their successful path.
> Georg Lausen

Dr. Christopher A. Welty                    IBM Watson Research Center
+1.914.784.7055                             19 Skyline Dr.
cawelty@gmail.com                           Hawthorne, NY 10532
Received on Friday, 28 August 2009 13:38:24 UTC

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