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EDBT
2008
ACM
162views Database» more  EDBT 2008»
15 years 9 months ago
Schema merging and mapping creation for relational sources
We address the problem of generating a mediated schema from a set of relational data source schemas and conjunctive queries that specify where those schemas overlap. Unlike past a...
Rachel Pottinger, Philip A. Bernstein
AIR
2006
124views more  AIR 2006»
14 years 9 months ago
Expressiveness of temporal query languages: on the modelling of intervals, interval relationships and states
Abstract Storing and retrieving time-related information are important, or even critical, tasks on many areas of Computer Science (CS) and in particular for Artificial Intelligence...
Rodolfo Sabás Gómez, Juan Carlos Aug...
ICDT
2001
ACM
162views Database» more  ICDT 2001»
15 years 2 months ago
Algebraic Rewritings for Optimizing Regular Path Queries
Rewriting queries using views is a powerful technique that has applications in query optimization, data integration, data warehousing etc. Query rewriting in relational databases ...
Gösta Grahne, Alex Thomo
ICDE
2004
IEEE
102views Database» more  ICDE 2004»
15 years 11 months ago
Approximate Temporal Aggregation
Temporal aggregate queries retrieve summarized information about records with time-evolving attributes. Existing approaches have at least one of the following shortcomings: (i) th...
Yufei Tao, Dimitris Papadias, Christos Faloutsos
82
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DASFAA
2007
IEEE
173views Database» more  DASFAA 2007»
15 years 4 months ago
Towards Adaptive Information Merging Using Selected XML Fragments
As XML information proliferates on the Web, searching XML information via a search engine is crucial to the experience of both casual and experienced Web users. The returned XML fr...
Ho Lam Lau, Wilfred Ng