Current research in context-awareness is biased toward low-level context
information. High-level context information, however, poses several challenges
to context management systems, which can be traced back to the asynchronicity
of context acquisition and use and the inherent dynamics and imperfection
in that process. This paper presents a three layer model allowing for dealing
with the problems of imperfection and aging in a controlled way. It conceives the
problem of high-level user context management as an information management
problem with specific requirements.