Keyphrases
- xml queries
- sql queries
- xml query evaluation
- relational database systems
- relational databases
- xml databases
- xml data
- xml processing
- xml documents
- xml query processing
- xml query languages
- path expressions
- query language
- data exchange
- xml schema
- relational model
- database
- databases
- database design
- join algorithms
- labeling scheme
- relational data
- query patterns
- building blocks
- information sources
- data model
- natural language