Keyphrases
- relational model
- data model
- relational databases
- database technology
- relational algebra
- incomplete information
- functional dependencies
- complex objects
- data modeling
- relational database systems
- conceptual model
- spatial databases
- nested relations
- database
- relational models
- database systems
- database management systems
- database query languages
- xml schema
- data warehousing
- shortest path
- domain specific
- data structure
- decision making