Zinnikus, IngoBogdanovich, AntonSchäfer, Ralph2017-11-152017-11-152002http://abis.l3s.uni-hannover.de/images/proceedings/abis2002/abis2002_zinnikus.pdfhttps://dl.gi.de/handle/20.500.12116/5155In this paper, we describe the use of a hierarchical ontology representation as a basis for modelling user preferences in the SAID project for elderly and disabled persons. The nodes of the ontology tree are associated with either pre-selected or dynamically found web sites relevant for each topic of the user s interest (in this way web-surfing can be substituted by browsing through the ontology). In order to further reduce the complexity of the tree, we combine this approach with applying a probability based recommendation system which monitors the user s actions and adapts itself according to the observed behaviour. We also show that the resulting ontology tree is compatible with Bayesian networks and discuss limitations and possible extensions.enUser-adaptivityuser modellingontologySAIDText/Conference Paper