A Modified Relational Algebra and its Use in an Entity-Relationship Environment.
Victor M. MarkowitzYoav RazPublished in: ER (1983)
Keyphrases
- relational algebra
- entity relationship
- relational model
- data model
- relational data model
- relational databases
- data modeling
- query language
- relational database systems
- database technology
- functional dependencies
- complex objects
- conceptual model
- object oriented
- relational calculus
- expressive power
- normal form
- relational schema
- incomplete information
- database design
- database schema
- database
- first order logic
- databases
- data integration
- conceptual schema
- data sources
- xml documents
- database management
- data storage
- xml schema
- autonomous agents