Keyphrases
- data exchange
- query answering
- data integration
- data management
- schema mappings
- temporal information
- temporal constraints
- temporal reasoning
- closed world
- data sources
- databases
- inclusion dependencies
- database systems
- logic programming
- decision support
- conjunctive queries
- special case
- relational databases
- database
- tuple generating dependencies
- issues arise
- digital campus
- xml data exchange