We introduce SpaT (Spatial Tuples), an extension of the basic tuple-based model where 
tuples are conceptually placed in the physical world and possibly move, (ii) the behaviour of coordination primitives may depend on the spatial properties of the coordinating agents, and (iii) the tuple space can be conceived as a virtual layer augmenting physical reality. Motivated by the needs of mobile augmented-reality applications, SpaT explicitly aims at supporting space-aware and space-based coordination in pervasive computing scenarios.
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