@INPROCEEDINGS{HanusHuch03WFLP,
author = "Hanus, M. and Huch, F.",
title  = "An Open System to Support Web-based Learning",
year         = "2003",
address      = "Valencia (Spain)",
booktitle    = "Proc.\ of the 12th International Workshop on Functional and
                (Constraint) Logic Programming (WFLP 2003)",
abstract = {
In this paper we present a system, called \emph{CurryWeb},
to support web-based learning.
Characteristic features of this system is openness and 
self-responsible use.
Openness means that there is no strong distinction between
instructors and students, i.e., every user
can learn with the system or add new learning material to it.
Self-responsible use means that every user is responsible
for selecting the right material to obtain the desired knowledge.
However, the system supports this selection process by
structuring all learning material hierarchically
and as a hypergraph whose nodes and edges are marked with
educational objectives and educational units, respectively.

The complete system is implemented with the declarative multi-paradigm
language Curry. In this paper we describe how the various
features of Curry support the high-level implementation
of this system. This shows the appropriateness of declarative
multi-paradigm languages for the implementation of
complex web-based systems.
}
}