On the Equivalence and Containment Problems for Unambiguous Regular Expressions, Grammars, and Automata
Richard Edwin StearnsHarry B. Hunt IIIPublished in: FOCS (1981)
Keyphrases
- regular expressions
- finite automata
- pattern matching
- regular path queries
- semistructured data
- tree automata
- query containment
- query evaluation
- query language
- regular languages
- context free grammars
- finite state machines
- xml schema
- computational complexity
- conjunctive queries
- data exchange
- co occurrence
- information extraction
- domain knowledge
- relational databases