Keyphrases
- entity relationship
- query language
- data model
- object oriented
- conceptual model
- relational data model
- relational model
- relational algebra
- expressive power
- database design
- conceptual database design
- er model
- database
- database schema
- data modeling
- extended entity relationship
- database systems
- data integration
- data types
- conceptual schema
- relational databases
- databases
- relational schema
- conjunctive queries
- complex objects
- database management systems
- data sources
- entity relationship diagrams
- functional dependencies
- xml data
- programming language
- case study
- user defined
- semantic data models
- incomplete information
- database applications
- conceptual models
- software engineering
- data warehouse
- user interface