2228 search results - page 281 / 446 » A System for Semantic Query Optimization |
PODS
2005
ACM
14 years 8 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...
WIAMIS
2009
IEEE
14 years 3 months ago
2009
IEEE
This paper suggests an alternative solution for the task of spoken document retrieval (SDR). The proposed system runs retrieval on multi-level transcriptions (word and phone) prod...
CSMR
2008
IEEE
14 years 2 months ago
2008
IEEE
Databases are continuously evolving environments, where design constructs are added, removed or updated rather often. Small changes in the database configurations might impact a l...
ERCIMDL
2007
Springer
14 years 2 months ago
2007
Springer
Abstract. In this paper we present an approach to question answering over heterogeneous knowledge sources that makes use of different ontology management components within the sce...
DEXA
2005
Springer
14 years 1 months ago
2005
Springer
In relational database systems a combination of privileges and views is employed to limit a user’s access and to hide non-public data. The data privacy problem is to decide wheth...