ABSTRACT
An e-service is specified by a Service Description (SD), which typically describes the service in terms of the device type, the service type, and some attributes (such as the location of user). An e-service is an application component that an organization provides in order to be assembled and re-used in a distributed manner, on an Internet-based network. The term component used here refers to a set of object oriented classes assembled together to be deployed as a single software unit, with explicit and well-specified interfaces for the services it provides and for the services it expects from other components. An e-service can be used in a portal, in an e-commerce application, to offer services in a public context (e.g., a service allowing
citizens to access and to manage information about their retirement plans) or more generally in an e-application. An e-application is a distributed application that integrates, in a cooperative way, the e-services offered by some entities.
