Ambient Assisted Living (AAL) systems are developed to facilitate the daily lives of elderly people, increase their autonomy and improve their safety. The symbolic reasoning about space and time is a fundamental aspect of these systems for recognizing situations and providing customized assistive services. In this paper, we propose a semantic and architectural approach for the Spatio-Temporal Reasoning in AAL systems. This approach combines first order reactive reasoning, and narrative representation and reasoning. The paper presents the narrative semantic representation foundations and the narrative inference architecture. An AAL scenario inspired from everyday life situations is presented and analyzed to show the feasibility of the proposed approach.
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