Abstract
This paper presents an approach to the integration of a logic based approach to the extension of behavioural specifications in a reactive model. In fact, in general, reactive models provide a robust support to the modelling and implementation of agent's environment, they often lack in supporting the definition of complex autonomous agent behaviours. In particular the paper will describe how the Hybrid Commonsense Spatial Logic approach to spatial reasoning can improve the definition of behavioural rules for agents in the Multilayered Multi-Agent Situated System (MMASS) model. The two models are briefly introduced, then a description of the integration of the two approaches is given, with examples related to agents spatial perception.