At 9:11 AM +0200 10/24/06, Ivan Herman wrote:
HI Adrian & all,
yes, I can see your point and indeed, if a rule system was around, it
may do the trick in simple cases. Another (non-exclusive) approach is
what I briefly mentioned at the F2F: is the development of a kind of an
intermediate layer between RDFS and OWL; a layer that would allow some
extra information to be added to the knowledge base without forcing the
usage of a DL reasoner. There are several approaches for this, and we (I
mean, W3C) may want to look into this more closely next year...
Ivan
other than having a lot of trouble with Ivan's statement that implies
that you need a DL reasoner to do anything useful with OWL (which is
clearly untrue and not what he really meant to imply) I definitely
agree with this :-)
-JH
Adrian Walker wrote:
Hi Ivan, Kerstin & All --
A quick thought about "you are a perfectly decent Semantic Web citizen
even if you do not use OWL".
We have found that, even in rather simple cases, it's quite hard for a
programmer to check that inferences over RDF are producing correct results.
An approach that we have found useful is to reason over RDF using rules
in executable, open vocabulary English.
With this extra English semantics attached, we can have the system
explain, in English, at the business or scientific level, how it derived
a result.
There's a simple example at
https://www.reengineeringllc.com/demo_agents/RDFQueryLangComparison1.agent
You can view, edit, and run the example (and others) by pointing a
browser to reengineeringllc.com <http://reengineeringllc.com> and
selecting the example RDFQueryLangComparison1 .
HTH, -- Adrian
Internet Business Logic (R)
Executable open vocabulary English
Online at www.reengineeringllc.com <http://www.reengineeringllc.com>
Shared use is free
Adrian Walker
Reengineering
Phone: USA 860 830 2085
--
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