Keyphrases
- xml queries
- xml documents
- xml data
- xml databases
- keyword queries
- data exchange
- xml query processing
- relational database systems
- frequent query patterns
- relational data
- xml schema
- join algorithms
- sql queries
- relational databases
- xml query evaluation
- query patterns
- text mining
- data model
- databases
- query language
- query processing
- labeling scheme
- xml query languages
- search engine