Keyphrases
- xml documents
- xml data
- query evaluation
- transitive closure
- regular expressions
- querying xml data
- query language
- regular path queries
- xml fragments
- constraint satisfaction
- conjunctive queries
- query containment
- xpath queries
- object oriented
- integrity constraints
- xml queries
- linear constraints
- database
- automata theoretic
- xml streams
- tree automata
- database systems
- global constraints
- xml databases
- constrained optimization
- relational databases
- special case
- first order logic
- query optimization