Composing Schema Mappings: Second-Order Dependencies to the Rescue.
Ronald FaginPhokion G. KolaitisLucian PopaWang Chiew TanPublished in: PODS (2004)
Keyphrases
- schema mappings
- source to target tgds
- data exchange
- desirable properties
- finite sets
- data integration
- inclusion dependencies
- tuple generating dependencies
- database schema
- schema evolution
- query answering
- source to target tuple generating dependencies
- high level specifications
- xml schema
- target schema
- xml data exchange
- source schema
- data management
- conjunctive queries
- data complexity
- logical equivalence
- data dependencies
- integrity constraints
- expressive power