摘要: Interest in XML databases has been expanding rapidly over the last few years. In this paper, we study problem of incorporating probabilistic information into databases. We propose Probabilistic Interval (PIXML for short) data model paper. Using model, users can express within markups. addition, provide two alternative formal model-theoretic semantics PIXML data. The first is a “global” which relatively intuitive, but not directly amenable to computation. second “local” supports efficient prove several correspondence results between semantics. To our knowledge, theoretic interval XML. then an operational that may be used compute answers queries and correct large class instances.
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