Iris Hochstatter Michael Duergner Michael Krause A Context Middleware Using an Ontology-Based Information Model. 17-24 2007 conf/ifip6-6/2007 EUNICE http://dx.doi.org/10.1007/978-3-540-73530-4_3 db/conf/ifip6-6/eunice2007.html#HochstatterDK07