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SIGMOD
2011
ACM
176views Database» more  SIGMOD 2011»
12 years 11 months ago
Sharing work in keyword search over databases
An important means of allowing non-expert end-users to pose ad hoc queries — whether over single databases or data integration systems — is through keyword search. Given a set...
Marie Jacob, Zachary G. Ives
ICDT
2007
ACM
105views Database» more  ICDT 2007»
14 years 3 months ago
Optimization of Query Plans in the presence of Access Limitations
We consider the problem of querying data sources that have limited capabilities and can thus only be accessed by complying with certain binding patterns for their attributes. This ...
Andrea Calì, Diego Calvanese, Davide Martin...
CORR
2010
Springer
62views Education» more  CORR 2010»
13 years 9 months ago
On Infinitary Rational Relations and Borel Sets
Abstract. We prove in this paper that there exists some infinitary rational relations which are 0 3-complete Borel sets and some others which are 0 3-complete. These results give a...
Olivier Finkel
MST
2007
80views more  MST 2007»
13 years 8 months ago
The Power of Commuting with Finite Sets of Words
We construct a finite language L such that the largest language commuting with L is not recursively enumerable. This gives a negative answer to the question raised by Conway in 1...
Michal Kunc
CORR
2004
Springer
124views Education» more  CORR 2004»
13 years 8 months ago
On the existence of stable models of non-stratified logic programs
In this paper we analyze the relationship between cyclic definitions and consistency in GelfondLifschitz's answer sets semantics (initially defined as `stable model semantics...
Stefania Costantini