When an application is loaded or reloaded, all declarations contained in it and its subapplications are collected. Added to the collection are the implicit name declarations for all classes defined by the application and its subapplications. The resulting set of declarations defines the namespace that the application manages.

When an application is loaded or reloaded, the application variables, pools, pool variables, and classes that correspond to these declarations are created.

When an application is unloaded, the application variables, pools, pool variables, and classes are removed from the image.

The runtime structures that represent an application's namespace are rebuilt when any of its subapplications or classes is loaded or unloaded.