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Web Service Composition with Volatile Information Tsz-Chiu Au, Ugur Kuter, and Dana Nau
 

Summary: Web Service Composition with Volatile Information
Tsz-Chiu Au, Ugur Kuter, and Dana Nau
Department of Computer Science and Institute for Systems Research,
University of Maryland, College Park, MD 20742, USA
{chiu, ukuter, nau}@cs.umd.edu
Abstract. In many Web service composition problems, information may be
needed from Web services during the composition process. Existing research on
Web service composition (WSC) procedures has generally assumed that this in-
formation will not change. We describe two ways to take such WSC procedures
and systematically modify them to deal with volatile information.
The black-box approach requires no knowledge of the WSC procedure's inter-
nals: it places a wrapper around the WSC procedure to deal with volatile infor-
mation. The gray-box approach requires partial information of those internals, in
order to insert coding to perform certain bookkeeping operations.
We show theoretically that both approaches work correctly. We present ex-
perimental results showing that the WSC procedures produced by the gray-box
approach can run much faster than the ones produced by the black-box approach.
1 Introduction
Most existing research on automated composition of semantic Web services has focused
on Web service composition (WSC) procedures, i.e., procedures for finding a composi-

  

Source: Au, Tsz-Chiu - Department of Computer Sciences, University of Texas at Austin

 

Collections: Computer Technologies and Information Sciences