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Compressed materialised views of semi-structured data

Gourlay, Richard and Tripney, Brian and Wilson, John (2007) Compressed materialised views of semi-structured data. In: 24th British National Conference on Databases (BNCOD'07). IEEE, Piscataway, pp. 75-82. ISBN 0769529127

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Abstract

Query performance issues over semi-structured data have led to the emergence of materialised XML views as a means of restricting the data structure processed by a query. However preserving the conventional representation of such views remains a significant limiting factor especially in the context of mobile devices where processing power, memory usage and bandwidth are significant factors. To explore the concept of a compressed materialised view, we extend our earlier work on structural XML compression to produce a combination of structural summarisation and data compression techniques. These techniques provide a basis for efficiently dealing with both structural queries and valuebased predicates. We evaluate the effectiveness of such a scheme, presenting results and performance measures that show advantages of using such structures.