Keyphrases
- context free grammars
- grammatical inference
- context free languages
- context free
- visual languages
- syntactic pattern recognition
- grammar induction
- tree adjoining
- attribute grammars
- covering arrays
- predicate invention
- production rules
- formal languages
- closure properties
- regular expressions
- regular languages
- machine learning
- finite state
- xml schema
- production system
- knowledge acquisition
- information extraction