You may have certain tasks, monitors, or connection types that are defined to software components, but not to business components. You may want the business system to know about these tasks, monitors, and connection types.
For example, the Mail business component defines basic Start and Stop tasks that are relevant to all mail systems. These tasks are mapped to Start Mail Server and Stop Mail Server. However, the Notes instrumentation has defined additional tasks that are specific to Notes, such as "Start Notes Router," and "Compact Mailbox." You do not want to define these tasks to the business component, because, for example, cc:Mail does not have these tasks and could not map them to cc:Mail tasks. Therefore, you would define these tasks in the Software Component description file and expose them in the Component Task List, so that they will display in the pop-up menu for a Notes Server.