A multi-tier application for interaction with a user interface comprises a presentation tier (e.g. a web server with a JSP/servlet engine) and a business logic tier (e.g. an application server) to manipulate data for subsequent presentation on the user interface. A direction module, such as a requested...http://www.google.com.tw/patents/US7389517?utm_source=gb-gplus-share專利 US7389517 - Method and system for creating and providing a multi-tier network service using separated function and presentation components