Closure properties of certain classes of languages under bi-language form.
Zhixi FangJitender S. DeogunPublished in: ACM Conference on Computer Science (1986)
Keyphrases
- closure properties
- expressive power
- context free grammars
- context free
- tree automata
- regular languages
- conjunctive queries
- query language
- formal language
- structural properties
- target language
- regular expressions
- grammatical inference
- context dependent
- representation language
- knowledge representation
- natural language
- databases
- context sensitive
- query evaluation
- business intelligence
- machine learning