Enabling conversations with web services

The emerging standards for the publication of Web Services enable the invocation of services having simple interaction protocols, but they fail to support complex e-business interactions, where the peers exchange several messages. In order to extend the classes of services which can be invoked by the consumers, we propose a conversational model supporting the management of complex interactions between clients and Web Services. Our model supports the consumer in the management of a conversation which respects the business logic of the service without imposing the explicit management of the conversational context.