A Probabilistic Relational Algebra for the Integration of Information Retrieval and Database Systems.
Norbert FuhrThomas RöllekePublished in: ACM Trans. Inf. Syst. (1997)
Keyphrases
- relational algebra
- relational database systems
- database systems
- information retrieval
- data model
- probabilistic databases
- relational model
- query language
- expressive power
- data integration
- normal form
- database technology
- relational calculus
- complex objects
- first order logic
- database query languages
- database design
- database management systems
- transitive closure
- text mining
- databases
- relational data model
- relational databases
- query processing
- sql queries
- recursive queries
- data types
- relational operators
- database
- aggregate functions
- uncertain data
- incomplete information
- query optimization
- data management
- object oriented
- cost model
- query evaluation
- abstract data types
- database applications
- null values
- expert systems
- natural language