98 search results - page 5 / 20 » Query rewriting and answering under constraints in data inte... |
DKE
2010
13 years 8 months ago
2010
We describe the Consistency Extractor System (ConsEx) that computes consistent answers to Datalog queries with negation posed to relational databases that may be inconsistent with...
EDBTW
2004
Springer
14 years 1 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...
GLOBE
2008
Springer
13 years 9 months ago
2008
Springer
This paper addresses the problem of data integration in a P2P environment, where each peer stores schema of its local data, mappings between the schemas, and some schema constraint...
CIKM
2010
Springer
13 years 7 months ago
2010
Springer
In recent years, there has been an explosion of publicly available RDF and OWL data sources. In order to effectively and quickly answer queries in such an environment, we present...
PVLDB
2008
13 years 8 months ago
2008
The old problem of managing the history of database information is now made more urgent and complex by fast spreading web information systems, such as Wikipedia. Our PRIMA system ...