An Ontology-Extended Relational Algebra.
Piero A. BonattiYu DengV. S. SubrahmanianPublished in: IRI (2003)
Keyphrases
- relational algebra
- relational model
- expressive power
- data model
- query language
- relational calculus
- relational database systems
- normal form
- complex objects
- transitive closure
- first order logic
- relational operators
- database query languages
- summary tables
- relational data model
- database technology
- database systems
- aggregate functions
- machine learning
- natural language
- data structure
- knowledge base
- domain ontology
- multi dimensional
- knowledge representation
- statistical databases
- null values
- algebraic operations
- artificial intelligence