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Grid technologies have been developed in response to an increase in demand for computing applications designed to yield the benefits from collaboration, data sharing and sophisticated interaction of autonomous and geographically dispersed resources. Distributed Query Processing (DQP) is an appealing solution for expressing and efficiently evaluating requests across Grid resources. In this paper: (i) we identify parts of the Grid infrastructure that facilitate, and open new directions for, querydoi:10.1109/dexa.2004.1333525 dblp:conf/dexaw/GounarisPSF04 fatcat:6okyabn5rfgqhlbf5x2qllktau