Abstract: A method and system for integrating an application executing on a backend system with a mobile device that communicates over a network with the application. The integration includes retrieving from a storage area a method corresponding to a function in the application on the backend system, invoking the method corresponding to the function in the application and creating an interface to the application on the backend system. Information received from the application corresponds to the information requested by the mobile device. This information from the application is transformed to a format suitable for presentation on a mobile device by a presentation server and assisted by a hierarchical universal device library description of mobile devices and browsers.