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.
|Titolo:||XML document summarization: using XQuery for synopsis creation|
MARRARA, STEFANIA (Secondo)
|Parole Chiave:||XML ; Distributed databases ; Knowledge based systems ; Query languages ; Query processing ; Statistical databases.|
|Data di pubblicazione:||2004|
|Digital Object Identifier (DOI):||10.1109/DEXA.2004.1333597|
|Tipologia:||Book Part (author)|
|Appare nelle tipologie:||03 - Contributo in volume|