2 search results - page 1 / 1 » Reverse data exchange: coping with nulls |
PODS
2009
ACM
14 years 5 months ago
2009
ACM
An inverse of a schema mapping M is intended to "undo" what M does, thus providing a way to perform "reverse" data exchange. In recent years, three different f...
ICDT
2012
ACM
11 years 7 months ago
2012
ACM
A universal model of a database D and a set Σ of integrity constraints is a database that extends D, satisfies Σ, and is most general in the sense that it contains sound and co...