Keyphrases
- query language
- data model
- machine translation
- object oriented
- query evaluation
- relational algebra
- expressive power
- grammatical inference
- regular expressions
- database
- natural language
- context free grammars
- complex objects
- databases
- visual languages
- structured documents
- natural language processing
- graph grammars
- stochastic grammar
- conjunctive queries
- transitive closure
- context free
- finite state automata
- syntactic pattern recognition
- mildly context sensitive
- query translation
- structured data
- neural network
- parse selection