Keyphrases
- context free grammars
- definite clause
- higher order
- tree adjoining
- predicate invention
- context free languages
- syntactic pattern recognition
- grammatical inference
- visual languages
- pac learnability
- context free
- grammar induction
- regular expressions
- pairwise
- production rules
- semantic parsing
- stochastic context free grammars
- xml schema
- database
- tree bank
- regular languages
- syntactic analysis
- production system
- data management
- active learning
- natural language