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SIGMOD
2004
ACM
163views Database» more  SIGMOD 2004»
16 years 6 months ago
Constraint-Based XML Query Rewriting For Data Integration
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...
Cong Yu, Lucian Popa
APWEB
2004
Springer
15 years 11 months ago
Improving XML Query Performance Using Social Classes
In a state-of-the-art XML database, an XML query is evaluated as a sequence of structural joins in which positions of data nodes are used to perform each individual structural joi...
Weining Zhang, Douglas Pollok
LREC
2008
91views Education» more  LREC 2008»
15 years 7 months ago
Statistical Evaluation of Information Distillation Systems
We describe a methodology for evaluating the statistical performance of information distillation systems and apply it to a simple illustrative example. (An information distiller p...
J. V. White, D. Hunter, J. D. Goldstein
ER
1999
Springer
155views Database» more  ER 1999»
15 years 10 months ago
Detecting Redundancy in Data Warehouse Evolution
A Data Warehouse DW can be abstractly seen as a set of materialized views de ned over a set of remote data sources. A DW is intended to satisfy a set of queries. The views materi...
Dimitri Theodoratos
ICDE
2009
IEEE
170views Database» more  ICDE 2009»
16 years 7 months ago
Semantics of Ranking Queries for Probabilistic Data and Expected Ranks
Abstract-- When dealing with massive quantities of data, topk queries are a powerful technique for returning only the k most relevant tuples for inspection, based on a scoring func...
Graham Cormode, Feifei Li, Ke Yi