The mobile application diagram is a graphical editor where you create and define mobile business objects.
Use the mobile application diagram to create a mobile business object and then create and define its operations, attributes, and relationships between mobile business objects. You can create mobile business objects in the mobile application diagram using its menus, or you can drag items from the Toolbox and Server Explorer and drop them onto the mobile application diagram to develop the mobile business object.
Each new Mobile Application project generates an associated mobile application diagram.