686 search results - page 3 / 138 » Query Answering in Peer-to-Peer Data Exchange Systems |
PODS
2004
ACM
14 years 10 months ago
2004
ACM
Data exchange is the problem of taking data structured under a source schema and creating an instance of a target schema. Given a source instance, there may be many solutions ? ta...
ICDT
2003
ACM
14 years 3 months ago
2003
ACM
ICDT
2010
ACM
14 years 7 months ago
2010
ACM
The work reported here lays the foundations of data exchange in the presence of probabilistic data. This requires rethinking the very basic concepts of traditional data exchange, ...
ICDT
2009
ACM
14 years 10 months ago
2009
ACM
The class of unions of conjunctive queries (UCQ) has been shown to be particularly well-behaved for data exchange; its certain answers can be computed in polynomial time (in terms...
PODS
2008
ACM
14 years 10 months ago
2008
ACM
In the study of data exchange one usually assumes an openworld semantics, making it possible to extend instances of target schemas. An alternative closed-world semantics only move...