The gnome-vfs file abstraction layer provides a simplified and generalized way for applications to interact with files. The file abstraction layer also provides Uniform Resource Identifier (URI) locations that map to particular menu configuration files. To add a menu or a menu item for all users, you must add the menu or menu item to one of the URI locations. Table 2-1 lists the menus to which you can add items, and the URI locations that correspond to the menus.