86 search results - page 3 / 18 » Using Integrity Constraints to Provide Intensional Answers t... |
PVLDB
2010
14 years 8 months ago
2010
Ontology-based data access is a powerful form of extending database technology, where a classical extensional database (EDB) is enhanced by an ontology that generates new intensio...
GLOBE
2009
Springer
15 years 2 months ago
2009
Springer
Abstract. We show how to specify and use the metadata for a virtual and relational data integration system under the local-as-view (LAV) approach. We use XML and RuleML for represe...
105
click to vote
JAPLL
2010
14 years 8 months ago
2010
Answering queries over an incomplete database w.r.t. a set of constraints is an important computational task with applications in fields as diverse as information integration and ...
SIGMOD
2004
ACM
15 years 9 months ago
2004
ACM
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...
SUM
2007
Springer
15 years 3 months ago
2007
Springer
Abstract. We present the Consistency Extractor System (ConsEx) that uses answer set programming to compute consistent answers to first-order queries posed to relational databases ...