Defining spatiotemporal relations and modeling motion events are emerging issues of current research. Motion events are the\r\nsubclasses of spatiotemporal relations, where stable and unstable spatio-temporal topological relations and temporal order of\r\noccurrence of a primitive event play an important role. In this paper, we proposed a theory of spatio-temporal relations based\r\non topological and orientation perspective. This theory characterized the spatiotemporal relations into different classes according\r\nto the application domain and topological stability. This proposes a common sense reasoning and modeling motion events in\r\ndiverse application with the motion classes as primitives, which describe change in orientation and topological relations model.\r\nOrientation information is added to remove the locative symmetry of topological relations from motion events, and these events\r\nare defined as a systematic way. This will help to improve the understanding of spatial scenario in spatiotemporal applications.
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