443 search results - page 26 / 89 » Quasi-inverses of schema mappings |
ICDT
2010
ACM
13 years 11 months ago
2010
ACM
Relational data exchange deals with translating a relational database instance over some source schema into a relational database instance over some target schema, according to a ...
ICDT
2010
ACM
14 years 5 months ago
2010
ACM
It is known that the composition of schema mappings, each specified by source-to-target tgds (st-tgds), can be specified by a secondorder tgd (SO tgd). We consider the question of...
IPMU
1994
Springer
13 years 11 months ago
1994
Springer
A new chaotic mechanism is found to cause perspective reversal for ambiguious patterns. And the new senario to cause perspective reversal is proposed with use of chaos, by reexamin...
SIGMOD
2008
ACM
14 years 7 months ago
2008
ACM
Schema mappings are logical assertions that specify the relationships between a source and a target schema in a declarative way. The specification of such mappings is a fundamenta...
CSMR
2005
IEEE
14 years 1 months ago
2005
IEEE
Object-oriented applications are difficult to extend and maintain, due to the presence of implicit dependencies in the inheritance hierarchy. Although these dependencies often co...