Keyphrases
- expressive power
- query language
- data model
- linear programming
- databases
- database query languages
- algebraic expressions
- syntactic and semantic dependencies
- case study
- language independent
- multi lingual
- algebraic structure
- grammatical inference
- algebraic geometry
- description languages
- boolean algebra
- linguistic resources
- english text
- information retrieval systems
- genetic algorithm
- neural network