Service collaboration system

Abstract

A user interaction type service collaboration system, in which a user terminal calls Web service provisioning servers in sequence via a Web portal server and a service scenario execution server, and each Web service provisioning server carries out interaction processing with the user terminal, is provided with a callback control server having: a callback control part responding to reception, from the Web service provisioning server, of the callback request accompanied by a callback user ID, and transmitting an interaction processing start request to the user terminal using an ID identifying the user terminal or a session due to the user terminal; and a callback ID management part associating and managing IDs and callback user IDs and acquiring IDs corresponding to callback user IDs.

Dependencies are inferred from the claim text.