This paper presents a methodology to support approximate queries over massive and heterogeneousXMLdatasets, based on concise data statistics such as histograms or other statistical techniques. The basic idea for approximate answers is to store pre-computed summaries of the XML data, also called synopses, and to query them instead of the original database, thus saving time and computational costs. In particular, in this paper we concentrate on a set ofXQuery transformation rules for the construction of the synopses collection and for querying the synopsis.
XML document summarization: using XQuery for synopsis creation / S. Comai, S. Marrara, L. Tanca - In: Fifteenth international workshop on database and expert systems applications : 30 august - 3 september 2004, Zaragoza, Spain : proceedings / [a cura di] [s.n.]. - Los Alamitos : Institute of electrical and electronics engineers, 2004. - ISBN 0769521959. - pp. 928-932 (( Intervento presentato al 15. convegno International Workshop on Database and Expert Systems Applications tenutosi a Zaragoza, Spain nel 2004.
XML document summarization: using XQuery for synopsis creation
S. MarraraSecondo
;
2004
Abstract
This paper presents a methodology to support approximate queries over massive and heterogeneousXMLdatasets, based on concise data statistics such as histograms or other statistical techniques. The basic idea for approximate answers is to store pre-computed summaries of the XML data, also called synopses, and to query them instead of the original database, thus saving time and computational costs. In particular, in this paper we concentrate on a set ofXQuery transformation rules for the construction of the synopses collection and for querying the synopsis.
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