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RE: Service Disovery using DAML-S

From: Charlie Abela <abcharl@maltanet.net>
Date: Thu, 14 Nov 2002 17:44:34 +0100
To: "Vikas Deora" <v.deora@cs.cardiff.ac.uk>
Cc: <www-ws@w3.org>
Message-ID: <OBEOLJNEPKKHAJJIGKDKKEGJCBAA.abcharl@maltanet.net>
The ppl working on the DAML-S matchmaker can obviously be more of help here,
but from my limited experience I can say this:
Check the site : http://www.daml.ri.cmu.edu/site/publications.html and
especially the following paper:
http://www-2.cs.cmu.edu/~terryp/Pubs/ISWC2002-Matchmaker.pdf for the
matching algorithm they used. They have developed an algorithm that
considers various degrees of matching, on the inputs and outputs of a
particular web service. There is also a paper from the group working at HP
on similar matching algorithm.
As for the interpreter, I have used JTP (Java Theorem Prover) from
http://www.ksl.stanford.edu/software/JTP/, although, RACER and FACT can be
considered more ideal since they are based on DL.
I think that the Jena toolkit can be used also because it supports the
Berkley DB storage, u can check on the HP site for more information.

Hope this helps


Charlie Abela
MSc Research Student
University of Malta
Web: http://alphatech.mainpage.net
Email: abcharl@maltanet.net

-----Original Message-----
From: www-ws-request@w3.org [mailto:www-ws-request@w3.org]On Behalf Of Vikas
Sent: 14 November 2002 15:30
To: www-ws@w3.org
Subject: Service Disovery using DAML-S


I had a query. I have to create a system, which can accept a request for
service from an agent. This agent will send me a DAML-S formatted message,
using FIPA-ACL protocol. This can either be an advertisement or request for
service. If it is an advertisement - than you have to add the service to the
advertisement database. And if it's a request for service than you have to
search for the appropriate services and return a list of agents that can
provide the requested service.

Thing is I am not sure of what I am thinking if it is right or wrong. From
what I have read till now it looks like, that the advertisement database can
be any database - can be Oracle , SQL, UDDI, XML based DB. Basically the
database will be used for the persistent storage of the advertisements for
services which are daml-s documents.

 Also you will need a DAML+OIL reasoner, this can be either FaCT, RACER, XSB

Also you will need to develop service ontology - for which I am thinking of
using the JENA toolkit.

What I am thinking is once the message is received it will go to some form
of Matchmaking programs- written in Java - I think so - and it will see if
its an advt, it will simply add it to the database.

service than it will use a DAML+OIL reasoner to check the ontology for
services for services which are not just syntactically similar but also
semantically mean the same. For example it can search for services which can
provide him with a stock quote service. But a stock quote service can be
provided also by someone who can provide financial service. Thus both of
these services name will be return to the matchmaking programs. Now the
matchmaker searches the advertisement database for services that names are
returned (in this case it is Financial service and stock quote service) and
return the name and description of all the agents who can provide either of
the services.

Can you please comment on what I am thinking if it is right or wrong. Also I
am not sure if anyone has already written any programs to do this. As I
think CMU has this system running. I am not sure which database should I use
for advertisements and if it will support daml-s, any recommendation will
help. Also I am not sure on the DAML+OIL reasoner to use, which can also
interact with java programs. So any comments will help a lot.

Thanking you
Vikas Deora
Received on Thursday, 14 November 2002 11:43:41 GMT

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