Integrating learning object repositories using a mediator architecture

Authors:
Philipp Kärger;Carsten Ullrich;Erica Melis
Affiliations:
Saarland University, Saarbrücken, Germany;German Research Center for Artificial Intelligence (DFKI), Saarbücken, Germany;German Research Center for Artificial Intelligence (DFKI), Saarbücken, Germany
Venue:
EC-TEL'06 Proceedings of the First European conference on Technology Enhanced Learning: innovative Approaches for Learning and Knowledge Sharing
Year:
2006

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Abstract

We propose a mediator architecture that allows a learning system to retrieve learning objects from heterogeneous repositories. A mediating component accepts queries formulated in a uniform query language, translates them into repository specific queries and passes them to each connected repository. For the translation of queries, a novel ontology-based query-rewriting method has been developed. The architecture has been realized in the Web-based, user-adaptive and interactive e-learning environment ActiveMath. Currently, it enables the ActiveMath's course planner to access four heterogeneous learning object repositories.