" Microsoft Foundation Classes (MFC). The Java Swing GUI library . More recently there have been attempts to apply MVC architectures for web-based interfaces. In the design of web applications, MVC is also known as a "Model 2" architecture in Sun parlance. Complex web applications continue to be more difficult to design than traditional applications, and MVC is being pushed as a potential solution to these difficulties. Beware: many applications which claim to comply with this much misunderstood pattern in fact do not achieve the required separation of model and view. JavaServer Faces , Jakarta Struts and Webwork2 are currently the most popular web oriented MVC implementations. Model Photo Rocket Struts works at a page level; JSF works at a component level . The WebObjects development/deployment environment is strongly based on MVC. "

" However, MVC encompasses more of the architecture of an application than is typical for a design pattern. Hence the term architectural pattern may be useful (Buschmann, et al 1996), or perhaps an aggregate design pattern. Operation In broad terms, constructing an application using an MVC architecture involves defining three classes of modules. Model: This is the domain-specific representation of the information on which the application operates. The model is another name for the domain layer. Domain logic adds meaning to raw data e. g. Model Rocket Scale calculating if today is the user's birthday or the totals, taxes and shipping charges for shopping cart items. View: This renders the model into a form suitable for interaction, typically a user interface element. "