Keyphrases
- object identity
- object oriented databases
- complex objects
- object management
- deductive databases
- object oriented
- data model
- metadata
- data types
- functional language
- management system
- equivalence relation
- abstract data types
- database
- multiple inheritance
- general purpose
- integrity constraints
- relational model
- query language
- relational databases
- relational database systems
- preprocessing
- primitive operations