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Re: DAML-S: nondeterministic services

From: Mark Burstein <burstein@bbn.com>
Date: Sun, 4 May 2003 11:33:50 -0400 (EDT)
Message-ID: <16053.13022.643925.189786@odette.bbn.com>
To: Mithun Sheshagiri <mits1@cs.umbc.edu>, www-ws@w3.org

Compositions of such a service would have to account for both possible
outcomes being returned. Obviously, from a planning perspective, one is the
desired outcome that would cause the service to be selected in the first

Mithun Sheshagiri writes:
 > Hello all,
 >                 Suppose we have a service ApproveCredit that takes in 
 > CCName, CCNumber and CCExpiryDate as the input and produces the ValidCC 
 > and InValidCC as the conditional effects based on the condition VALID. 
 > If this is the right way for modeling this kind of service then how 
 > would you advertise this service.
 > The service cannot indicate the "value" of VALID if inputs are not 
 > known. This service is nondeterministic w/o the value of VALID. How will 
 > you handle such services for composition. One possibility is to have a 
 > 2-phase method. The first phase involves providing the inputs to the 
 > service provider who in return will provide the value for VALID. Once 
 > VALID is known, composition is possible.
 > peace,
 > Mithun
 > http://www.cs.umbc.edu/~mits1

*    Dr. Mark Burstein              *     Email: burstein@bbn.com            *
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Received on Sunday, 4 May 2003 11:39:30 GMT

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