Keyphrases
- context free grammars
- grammatical inference
- context free languages
- syntactic pattern recognition
- context free
- predicate invention
- lexical semantics
- closure properties
- attribute grammars
- xml schema
- covering arrays
- formal languages
- production rules
- grammar induction
- regular languages
- context sensitive
- natural language processing
- information extraction
- metadata
- neural network
- databases