ScriptOrc: A Specification Language for Web Service Choreography

Web services are autonomous and heterogeneous computational entities. The need to build Web services rapidly has necessitated to realize ease of design and implementation through the paradigm of model based design, as a normal requirement rather than an exception. The specification, design and implementation of Web service applications need to address three major aspects: orchestration of services, conversation and choreography. In distributed computing, abstractions such as scripts have been used to abstract patterns of communication hiding low level details. In this paper, we demonstrate an approach of integrating orchestration with scripting to depict a pattern of communication or conversations among various agents. This leads to an effective specification language ScriptOrc for Web services choreography. We shall illustrate the usages with examples from workflow systems.