Research On Maintainability And Expansibility Of E-Learning Systems

-Web based E-learning system is by nature a multi-layer structured web application. It is composed of a main directory in web server which includes sub-directories, virtual directories, a large amount of documents and databases, all of which constitute the educational resources of the E-learning system. In the traditional E-learning system, educational resources are often organized statically in specific coursewares. Due to the characteristics of web application itself, updates in course contents may lead to great changes in document positions and hyperlinks, thus resulting poor maintainability and expansibility of E-learning systems. This paper proposed a knowledge point based metadata model of educational resources, though which the changes in course contents could be altered logically via directory structures of the course, without direct change of the contents of web pages, hence enhancing the maintainability and expansibility of E-learning systems. Based on this research, an educational resources content management system supporting this model was designed and implemented.