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RE: [owl-s] communication between web services

From: jean-michel nougayrede <nougay_j@epita.fr>
Date: Thu, 9 Sep 2004 15:33:15 +0200
To: <public-sws-ig@w3.org>
Message-Id: <20040909133252.38F5318000D9@mwinf0806.wanadoo.fr>


> > For example there is a web service A which sells a product P and 
> > then connect to another web service B in order to ship the product P.
> > But the web service A doesn't know the web service B which can do 
> > the shipping. The web service A searches on the web in order to find 
> > one, and when it finds one, it uses it.
> > But the problem is that the web service A doesn't know what are the 
> > functions to be called and with which arguments and in which order.
> 
> It would make sense to use the WDSL description of the service.
> 

I don't understand how we can automatize an execution of a web service with
a WSDL description because I don't understand how a web service can
understand a WSDL file.

For example let's see this sample of WSDL:

<message name="getCoursInput">
    <part name="nomEntreprise" type="xsd:string" />
  </message>

  <message name="getCoursOutput">
    <part name="coursAction" type="xsd:float" />
  </message>

  <portType name="BoursePortType">
    <operation name="getCours">
      <input message="getCoursInput" /> 
      <output message="getCoursOutput" /> 
    </operation>
  </portType>

How a ws can know how to use the operation "getCours", which parameter to
provide and the meaning of this operation?


> > Must web services share the same language (in our case all the web 
> > services for the shipping have the same function and argument)?
> 
> They don't need to use the same description (wsdl file) to be usable.
> But in the search part of the problem, you can assume that they will 
> share some ontology.
> 

What do you mean by ontology? Is it a common set of terms between two
business entities?

Thanks.

Jean-Michel.
Received on Thursday, 9 September 2004 13:33:25 UTC

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