Figure 4.

Fragment of the ontology that models the context information about the characteristics and risk factors. Fragment of the ontology which models (1) the characteristics of the helpers and (2) the risk factors of the patients. To highlight the possibilities of the system, a (not exhaustive) list of risk factors was assembled by experts from both the medical and nurse call domain. The squares represent the classes. The arrows with the striped lines indicate subclass relationships. The other arrows and lines indicate relations between classes (object properties).