Keyphrases
- integrity constraints
- xml documents
- xml schema
- deductive databases
- functional dependencies
- integrity checking
- xml data
- xml queries
- database schema
- database integrity
- inclusion dependencies
- xml databases
- query answering
- constraint checking
- conjunctive queries
- schema integration
- semantic query optimization
- data model
- relational databases
- regular expressions
- database transactions
- databases
- relational data
- probabilistic inference
- conceptual schema
- data exchange
- data integration
- xpath queries
- relational schema
- object oriented databases
- normal form
- metadata
- database