Implementation of an annotation service on the WWW-Virtual Notes

We present the implementation of Virtual Notes, an annotation service on the World Wide Web using only standard Internet technology. Therefore Virtual Notes are immediately usable by anyone on the WWW without preparation. This makes the solution especially suited for environments lacking a coherent workgroup, e.g. teaching or research. Also described are the user interface, several use cases and the administrative side of the annotation service, where the overhead for employing Virtual Notes has been minimized.