Let us now focus on the required infrastructure services for integration. We will identify the services from a high-level perspective and separate them into the horizontal and vertical layers. The services in horizontal layers will provide basic infrastructure services useful for the majority of existing and new-generation applications. The vertical layer services will provide functionalities related to a specific task within infrastructure that can span through several horizontal layer services.
The services on the horizontal layer include:
The vertical layers are:
The relations between the ...