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Relational algebra has been a crucial foundation for relational database systems, and has played a large role in enabling their success. A corresponding XML algebra for XML query processing has been more elusive, due to the comparative complexity of XML, and its history. It is argued that having a sound algebraic basis remains important nonetheless. This paper shows how the complexity of XML can be modeled effectively in a simple algebra, and how the conceptual clarity attained thereby can lead to significant benefits.

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Format:PDFSize:314 KB
Date:Aug 2006
Pages:10

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