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ECAI
1998
Springer
14 years 1 months ago
Description Logics with Concrete Domains and Aggregation
Abstract. We extend different Description Logics by concrete domains (such as integers and reals) and by aggregation functions over these domains (such as min;max;count;sum), which...
Franz Baader, Ulrike Sattler
ICDE
2009
IEEE
140views Database» more  ICDE 2009»
14 years 11 months ago
Predicting Multiple Metrics for Queries: Better Decisions Enabled by Machine Learning
One of the most challenging aspects of managing a very large data warehouse is identifying how queries will behave before they start executing. Yet knowing their performance charac...
Archana Ganapathi, Harumi A. Kuno, Umeshwar Dayal,...
LATA
2010
Springer
14 years 1 months ago
Variable Automata over Infinite Alphabets
Automated reasoning about systems with infinite domains requires an extension of regular automata to infinite alphabets. Existing formalisms of such automata cope with the infinite...
Sarai Sheinvald, Orna Grumberg, Orna Kupferman
CIKM
2009
Springer
14 years 2 months ago
Answering XML queries using materialized views revisited
Answering queries using views is a well-established technique in databases. In this context, two outstanding problems can be formulated. The first one consists in deciding whethe...
Xiaoying Wu, Dimitri Theodoratos, Wendy Hui Wang
FOCS
2004
IEEE
14 years 1 months ago
Approximating Edit Distance Efficiently
Edit distance has been extensively studied for the past several years. Nevertheless, no linear-time algorithm is known to compute the edit distance between two strings, or even to...
Ziv Bar-Yossef, T. S. Jayram, Robert Krauthgamer, ...