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180
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ICDT
2012
ACM
13 years 8 months ago
2012
ACM
The problems of query containment, equivalence, and minimization are recognized as very important in the context of query processing, specifically of query optimization. In their...
186
Voted
AIMSA
2010
Springer
15 years 7 months ago
2010
Springer
Abstract. Ontology based data access (OBDA) is concerned with providing access to typically very large data sources through a mediating conceptual layer that allows one to improve ...
204
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WWW
2011
ACM
15 years 1 months ago
2011
ACM
Recently answers for fact lookup queries have appeared on major search engines. For example, for the query {Barack Obama date of birth} Google directly shows “4 August 1961” a...
162
Voted
FQAS
2000
Springer
15 years 9 months ago
2000
Springer
- We investigate extensions of the classical measurement of effectiveness in information retrieval systems, precision and recall, to situations where the answer is modeled by a fuz...
186
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ICTIR
2009
Springer
15 years 3 months ago
2009
Springer
This paper presents a theoretical methodology to evaluate filters in XML retrieval. Theoretical evaluation is concerned with the formal investigation of qualitative properties of r...