Integration of distributed Learning Objects by Wrapper-Mediator architecture

The main problem addressed here is the definition of a strategy to improve the sharing and reusability of learning objects in an efficient manner inside an e-Learning community, reducing the cost of creating courses and other learning objects. In particular, in this paper we present a system, for integrating multimedia heterogeneous LO repositories and retrieving distributed data. Such system uses the LOM data model and a wrapper-mediator architecture to perform this task, so providing a simple mechanism for enabling the integration while maintaining the independence of the repositories. Our system also supports a semantic search on managed objects that makes more effective the retrieval process