Package caldb defines objects and operations that are part of a Calendar Tool user's workspace. This workspace has the underlying data that a user is actively working with during a Calendar Tool session. These data consist of the administrative data collections defined in Section 2.6 and the user options defined in Section 2.8.2 of the Milestone 4 requirements. These two sections of the requirements also trace to classes in the admin and edit packages. What is defined here in the caldb package is the higher-level workspace container for all the data available to the user during a session of Calendar Tool use.