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What is Web Service Description Language

Chapter 14

Handbook of Research on Architectural Trends in Service-Driven Computing

An XML-formatted language used to describe a Web service's capabilities as collections of communication endpoints capable of exchanging messages. It provides a machine-readable description of how the service can be called, what parameters it expects, and what data structures it returns. It thus serves a purpose that corresponds roughly to that of a method signature in a programming language.

Published in Chapter:

Automating Web Service Composition: An Ontological Agent Framework

Tamer M. Al Mashat (Cairo University, Egypt), Fatma A. El-Licy (Cairo University, Egypt), and Akram I. Salah (Cairo University, Egypt)

Source Title: Handbook of Research on Architectural Trends in Service-Driven Computing

DOI: 10.4018/978-1-4666-6178-3.ch014

Abstract

In the Service-Driven Computing paradigm, applications are typically built by composing a set of Web services. Web service composition facilitates rapid development of applications via service reuse and enables the creation of complex services from simpler application services. Research efforts in the area of Web service composition are concerned mainly with two challenges, namely automated service synthesis and verification of the composed Web services. This chapter presents a framework for Web service composition based on semantic specification through OWL-S to establish an ontological agent for automating Web service composition. The semantic description serves to define the planning domain for the agent to automate the composition procedure. A Petri nets model is applied to build a formal representation of the structure and behavior of the service. Finally, AND-OR graph methodology is used to represent the dependences among Web services to select between alternatives based on Quality of Service.

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