Keyphrases
- xml databases
- xpath queries
- keyword search
- xml query processing
- query engine
- xml data
- query patterns
- query processing
- xml queries
- efficient storage
- query evaluation
- relational databases
- xml documents
- keyword queries
- database
- join algorithms
- semi structured
- materialized views
- user queries
- structured data
- relational database management systems
- keywords
- data mining
- data exchange
- data sources
- data model
- data structure
- twig queries
- search engine