Keyphrases
- xml databases
- index scheme
- xml data
- efficient query processing
- xml documents
- relational databases
- xml queries
- join algorithms
- twig queries
- semi structured
- r tree
- scientific data
- keyword search
- xml query processing
- b tree
- xpath queries
- reachability queries
- xml schema
- database
- query optimization
- labeling scheme
- data model
- query processing
- databases
- relational database systems
- materialized views
- integrity constraints
- tree structure
- data integration
- index structure
- data structure