Man-ping Grace Chau

This article aims to illustrate how loose coupling of a Model in an MVC-based framework can be achieved by describing a real example - developing a framework for a Web-based XSD-XML generator, which is part of the Event Web research at the Infospheres Lab at Caltech. Why this is important is explained, along with a description of the various techniques used to accomplish the goal. Examples include: how a Model can be initiated in a modular manner; how to add dynamic properties to a Model without polluting the Model base classes; how to change the Model without affecting its existing operations; how the Model can be switched during runtime without affecting interactions with other components; how all these can be done if the Model is complex as in a DOM structure and is generated dynamically. Design patterns are largely employed to construct the framework; how the ... (more)