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» Constraint Databases: A Survey
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ER
2009
Springer
137views Database» more  ER 2009»
14 years 2 hour ago
Multi-level Conceptual Modeling and OWL
Ontological metamodeling or multilevel-modeling refers to ng complex domains at multiple levels of abstraction, especially in domains where the borderline between individuals and c...
Bernd Neumayr, Michael Schrefl
DAWAK
2001
Springer
13 years 12 months ago
Shared Index Scans for Data Warehouses
Tree based indexing structures like -trees, ·-trees, Bitmap indexes and Ê-trees have become essential for getting good performance when accessing vast datasets. However, most dat...
Yannis Kotidis, Yannis Sismanis, Nick Roussopoulos
VLDB
2001
ACM
109views Database» more  VLDB 2001»
13 years 11 months ago
Mining Multi-Dimensional Constrained Gradients in Data Cubes
Constrained gradient analysis (similar to the “cubegrade” problem posed by Imielinski, et al. [9]) is to extract pairs of similar cell characteristics associated with big chan...
Guozhu Dong, Jiawei Han, Joyce M. W. Lam, Jian Pei...
VLDB
2001
ACM
108views Database» more  VLDB 2001»
13 years 11 months ago
Potter's Wheel: An Interactive Data Cleaning System
Cleaning data of errors in structure and content is important for data warehousing and integration. Current solutions for data cleaning involve many iterations of data “auditing...
Vijayshankar Raman, Joseph M. Hellerstein
ISMVL
2000
IEEE
134views Hardware» more  ISMVL 2000»
13 years 11 months ago
The 2-SAT Problem of Regular Signed CNF Formulas
Signed conjunctive normal form (signed CNF) is a classical conjunctive clause form using a generalized notion of literal, called signed atom. A signed atom is an expression of the...
Bernhard Beckert, Reiner Hähnle, Felip Many&a...