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JIDM
2010
160views more  JIDM 2010»
15 years 2 months ago
Evaluation of Conditional Preference Queries
The need for incorporating preference querying in database technology is a very important issue in a variety of applications ranging from e-commerce to personalized search engines....
Fabiola S. F. Pereira, Sandra de Amo
SSD
1995
Springer
84views Database» more  SSD 1995»
15 years 7 months ago
Lossless Representation of Topological Spatial Data
We present a data structure used to represent planar spatial databases in the topological data model. Conceptually, such databases consist of points, lines between these points, an...
Bart Kuijpers, Jan Paredaens, Jan Van den Bussche
ICDT
2007
ACM
114views Database» more  ICDT 2007»
15 years 10 months ago
Axiomatizing the Logical Core of XPath 2.0
The first aim of this paper is to present the logical core of XPath 2.0: a logically clean, decidable fragment, which includes most navigational features of XPath 2.0 (complex co...
Balder ten Cate, Maarten Marx
ICDE
2002
IEEE
103views Database» more  ICDE 2002»
15 years 9 months ago
Using Unity to Semi-Automatically Integrate Relational Schema
Unity is an architecture for integrating relational databases that performs three processes: metadata capture, semantic integration, and query formulation and execution. The found...
Ramon Lawrence, Ken Barker
VLDB
1991
ACM
190views Database» more  VLDB 1991»
15 years 7 months ago
Algebraic Properties of Bag Data Types
We explore the implications of supporting bags (i.e. multisets) in a data model and associated query language, and present some formal results concerned with the algebraic propert...
Joseph Albert