Keyphrases
- xml data
- xml documents
- xml databases
- data model
- query optimization
- xml queries
- relational databases
- query language
- query evaluation
- xml schema
- relational and xml data
- query processing
- semi structured data
- relational data
- query decomposition
- data integration
- keyword search
- labeling scheme
- hierarchical data
- relational database systems
- xml query processing
- path expressions
- databases
- xml fragments
- native xml
- semi structured information
- standard for data exchange
- information integration
- querying xml data
- xml data sources
- queries on xml data