Learning Repositories and Metadata Modeling

The Open Learning Repository (OLR) is a framework for designing and implementing modularized and distributed learning repositories on the web. In the first part of this paper, we will discuss an OLR prototype system built on meta-information stored as RDF metadata. It is one of three prototypes implemented at our Institute to enhance e-learning. The KBS Adaptive Hyperbook, our first protoype, has been used for a projectoriented course for Java Programming, whose conceptual model is implemented in the conceptual modelling language O-Telos. Building on this experience, we will discuss RDF/RDFS and O-Telos modelling in depth in the second part of this paper and will analyse similarities and differences of these two modelling languages.