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Location-enhanced applications must manage various context data and make the best use of this data for application service in ubiquitous environment. Conventional mobile object data management architecture did not consider process of context data. Therefore a new design of mobile object data manager is needed to process location context data. In this paper, we design a new mobile object data manager for context awareness service. A suggestion framework is consisted of data collector, context manager, knowledge base, inference engine, and mobile object database. It describes a form of rule base and a process of inference engine and mobile operator.