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Location-awareness is an important aspect of context-aware applications. These applications enhance the functionality of ubiquitous computing services and applications by using numerous location sensing systems with variant precision and confidence levels. There is a need of seamless integration for these systems using a middleware infrastructure. In addition to interoperability of different systems, the proposed middleware manages the spatial location information in spatial database, infers using spatial relationship functions, and predicts the location of an object based on its history. The system facilitates the separation between applications and location technologies to enable dynamic add-on of new technologies without changing the existing applications.