====== Multi-Tiers ====== Layers reffer to the logical seperation of an application, for example Data Access Layer (DAL), Business Logic Layer (BLL) and User Interface Layer (UIL). ===== Layers ===== ==== Data Access Layer ==== * DAL : Data Access Layer ==== Business Logic Layer ==== * BLL : Business Logic Layer ==== User Interface Layer ==== * UIL : User Interface Layer [[Informatique:Tapestry]]