Modeling e-Negotiation Processes for a Service Oriented Architecture

Most of today’s e-marketplaces support a single negotiation protocol. The protocol is usually built into the emarketplace
infrastructure, therefore if a new one is introduced then a time consuming and complex process of
implementing it takes place. Moreover, participants in the e-marketplace need to adapt their interfaces to the
new protocol, especially if they use automated tools to interact with the e-marketplace. This paper reports on a
model-driven approach and a framework for rapid and user-friendly development of configurable service oriented
e-negotiation systems.We believe that a formal specification of negotiation protocols and their separation from the
market infrastructure that implements them is a step towards configurable e-negotiation systems. The protocols
are graphically designed for the e-marketplace then mapped into web service orchestrations. Participants use
automated negotiation systems to interact with the e-marketplace. These systems are generated based on the
negotiation protocol implemented on the e-marketplace. A declarative language is used to specify negotiation
strategies and tactics.We propose an algorithm to map Statechart models of negotiation protocols into web service
orchestrations and we report on the current implementation of our framework.