Keyphrases
- data model
- conceptual model
- query language
- database systems
- data integration
- relational model
- databases
- database
- database design
- data modeling
- data sources
- object oriented
- conceptual schema
- xml documents
- data types
- formal specification
- semistructured data
- specification language
- semi structured
- office information systems
- database management systems
- relational algebra
- object model
- information systems
- entity relationship
- formal verification
- operational semantics
- real time
- relational databases
- high level
- case study
- website
- machine learning
- schema evolution
- data sets