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At the same time, the context model has to be operational and to support context dependent service adaption and abstraction of the underlying context sensors. This leads to a layered context model for AAL with abstraction levels for different aspects. In this paper we focus on the requirements, the model elements and the concepts of the user interface layer of our approach.<\/p>","DOI":"10.4018\/japuc.2009090804","type":"journal-article","created":{"date-parts":[[2010,4,30]],"date-time":"2010-04-30T09:46:44Z","timestamp":1272620804000},"page":"61-80","source":"Crossref","is-referenced-by-count":2,"title":["End User Context Modeling in Ambient Assisted Living"],"prefix":"10.4018","volume":"1","author":[{"given":"Manfred","family":"Wojciechowski","sequence":"first","affiliation":[{"name":"Fraunhofer Institute for Software and System Engineering, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"japuc.2009090804-0","unstructured":"Chen, H., Finin, T., & Joshi, A. (2003). Using OWL in a Pervasive Computing Broker. 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