Keyphrases
- context free grammars
- grammatical inference
- context free
- context free languages
- syntactic pattern recognition
- regular expressions
- semantic parsing
- grammar induction
- formal languages
- neural network
- predicate invention
- attribute grammars
- lexical semantics
- closure properties
- databases
- covering arrays
- tree adjoining
- fuzzy logic
- query language
- natural language
- high level