297 search results - page 13 / 60 » On the Decidability of Consistent Query Answering |
96
Voted
PODS
2004
ACM
15 years 11 months ago
2004
ACM
We study the problem of answering queries over sources with limited access patterns. Given a first-order query Q, the problem is to decide whether there is an equivalent query whi...
PODS
2005
ACM
15 years 11 months ago
2005
ACM
Abstract. We present a semantics and answer set programs for relational peer data exchange systems. When a peer answers a query, it exchanges data with other peers in order to supp...
EDBTW
2004
Springer
15 years 5 months ago
2004
Springer
The problem of answering queries posed to a peer who is a member of a peer-to-peerdataexchangesystemisstudied.Theanswershavetobeconsistentwrt to both the local semantic constraints...
108
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EUSFLAT
2009
14 years 9 months ago
2009
This paper proposes an approach aimed at obviating empty answers for a family of conjunctive queries involving Boolean or fuzzy value constraints. Contrary to the approaches based ...
137
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PODS
1999
ACM
15 years 4 months ago
1999
ACM
Semistructured data occur in situations where information lacks a homogeneous structure and is incomplete. Yet, up to now the incompleteness of information has not been re ected b...