Keyphrases
- natural language
- grammatical inference
- context free grammars
- visual languages
- natural language processing
- mildly context sensitive
- stochastic grammar
- tree grammars
- context free
- context free languages
- parse selection
- information extraction
- expert systems
- learning environment
- syntactic pattern recognition
- high level
- closure properties
- image processing
- learning algorithm
- neural network