Keyphrases
- context free languages
- regular languages
- grammatical inference
- regular expressions
- finite automata
- context free grammars
- decision problems
- context free
- positive data
- pac learning
- finite state machines
- inductive inference
- query language
- machine learning
- context sensitive
- xml schema
- knowledge representation
- statistical queries
- hidden markov models
- natural language
- information retrieval