Keyphrases
- database
- databases
- data model
- database schema
- database systems
- query language
- database management systems
- conceptual schema
- relational databases
- semistructured data
- database views
- database applications
- data mining
- query interface
- object oriented
- schema evolution
- update operations
- view update
- integrity constraints
- schema mappings
- xml schema
- data management
- metadata