The classes under the APP name space are superiors, which are used to integrate the program's workflow. The Tools namespace is provided under the base-based feature to provide it to the App layer.
The design classification of the system is probably:
First, the database operation is packaged, and the base DAO class is obtained, and the astronomical observation modeling, abstract public objects, get basic tool classes, tool classes may use the DAO operation to model the service to be supplied to the SSS, get the upper layer Service, the service is existed as a daemon, and the upper layer service is packaged with CORBA. The upper layer service needs to use the tool class. There is also some other applications that can be operated and managed.
