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» GenerIE: Information extraction using database queries
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SIGMOD
2002
ACM
120views Database» more  SIGMOD 2002»
16 years 6 months ago
Exploiting statistics on query expressions for optimization
Statistics play an important role in influencing the plans produced by a query optimizer. Traditionally, optimizers use statistics built over base tables and assume independence b...
Nicolas Bruno, Surajit Chaudhuri
VLDB
2004
ACM
98views Database» more  VLDB 2004»
15 years 12 months ago
Top-k Query Evaluation with Probabilistic Guarantees
Top-k queries based on ranking elements of multidimensional datasets are a fundamental building block for many kinds of information discovery. The best known general-purpose algor...
Martin Theobald, Gerhard Weikum, Ralf Schenkel
SIGIR
2006
ACM
16 years 14 days ago
Mining dependency relations for query expansion in passage retrieval
Classical query expansion techniques such as the local context analysis (LCA) make use of term co-occurrence statistics to incorporate additional contextual terms for enhancing pa...
Renxu Sun, Chai-Huat Ong, Tat-Seng Chua
ICDE
2003
IEEE
157views Database» more  ICDE 2003»
16 years 7 months ago
Energy Efficient Index for Querying Location-Dependent Data in Mobile Broadcast Environments
We are witnessing in recent years growing interest for location-dependent information services among mobile users. This paper examines the issue of processing locationdependent qu...
Jianliang Xu, Baihua Zheng, Wang-Chien Lee, Dik Lu...
SIGMOD
2004
ACM
119views Database» more  SIGMOD 2004»
16 years 6 months ago
Lazy Query Evaluation for Active XML
In this paper, we study query evaluation on Active XML documents (AXML for short), a new generation of XML documents that has recently gained popularity. AXML documents are XML do...
Serge Abiteboul, Omar Benjelloun, Bogdan Cautis, I...