Composite Web Services

Kung-Kiu Lau and Cuong Tran
School of Computer Science, The University of Manchester
Manchester M13 9PL, United Kingdom
kung-kiu,ctran@cs.man.ac.uk

Abstract:
Currently, composition of web services is done by orchestration.
An orchestration is a workflow that combines invocations of individual
operations of the web services involved. It is therefore a composition
of individual operations, rather than a composition of entire web services.
In this paper we propose a different approach to web service composition,
whereby entire services are composed into composite services. The latter
are again entire web services, that is, they can be further composed using our
composition, or they can be used in an orchestration. We show how these
composite services can be constructed hierarchically and used in practice.