Explanation/Reference:
Each line of business has its own resources that are unique to the line of business and are controlled by that line of business. The enterprise wants to provide a single user interface that, at least from the user's perspective, unifies the separate lines of business.
In this example, the enterprise wide user interface deployment is a full featured user interaction architecture (i.e. it contains all of the capabilities defined in the Logical View). Each line of business deploys limited functionality since the only functionality required is the functionality to create interface elements exposing the resources of that line of business. The enterprise wide user interface then uses the interface elements provided by the lines of business to create a unified user experience.
The interface elements provided by the lines of business are Remote Providers to the enterprise user interface. This deployment allows the lines of business to maintain control of their respective resources since the only access to the resources is via the interface elements that they create.
Reference: Oracle Reference Architecture, User Interaction, Release 3.0