Keyphrases
- relational model
- relational databases
- data model
- database technology
- relational algebra
- data modeling
- functional dependencies
- complex objects
- incomplete information
- relational database systems
- conceptual model
- spatial databases
- nested relations
- relational models
- relational calculus
- xml schema
- query language
- decision support
- nearest neighbor
- xml documents
- multi agent
- similarity measure
- knowledge base
- database