Keyphrases
- context free grammars
- syntactic pattern recognition
- grammatical inference
- context free
- context free languages
- tree adjoining
- regular expressions
- visual languages
- grammar induction
- semantic parsing
- attribute grammars
- production rules
- covering arrays
- regular languages
- natural language processing
- closure properties
- tree automata
- artificial intelligence
- finite automata
- xml schema
- knowledge base