3-Level Service Composition and Cashew: A Model for Orchestration and Choreography in Semantic Web Services

Abstract

Abstract. There are two types of behavioural model in the WSMO semantic description of services: an orchestration and a choreography, together called the interface. While an orchestration defines a service's behaviour as a composition of existing parts, a choreography is intended to document the conversation of messages exchanged with a single client. In this paper we present a three-level model for behavioural descriptions, and how the Cashew workflow model fits into this, building on existing work in, and establishing connections with, semantic web services, workflow, and software engineering design.

Integration of Government Services using Semantic Technologies

“…Therefore a workflow-based extension to the WSMO specification has been designed and implemented. The extended process model used within Access eGov is based on the workflow CASheW-s model [17]. The state signature is reused from the WSMO specification and replaces the transition rules with the workflow constructs.…”

The Semantic Web

“…A related approach to process-based Web Service composition is goal-based orchestration [348] using the WSMO conceptual model. The key idea is that each stage in a process can be represented by a WSMO goal rather than a specific service identifier.…”