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Compared with relational data, it is more difficult to normalize XML data. In the relational data model, semantically relevant attributes compose relations which can simplify the normalization issue. But limited by the structural characteristics, the semantic relevancies of XML data cannot be outlined explicitly. Therefore, in the existing XML normalization proposals, XML constraints hold in the unsuitable...
XML data dependencies play important roles in eliminating XML redundancies and normalizing XML schemas. But the path expressions adopted in the existing XML data dependency models bring serious expressive deficiencies. In this paper, we propose a non-path way to express XML data dependencies and define XML attribute dependencies to address expressive deficiencies.
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