Keyphrases
- xml data
- relational data
- data model
- relational databases
- xml documents
- xml queries
- native xml
- xml keys
- xml databases
- query language
- query optimization
- query evaluation
- relational tables
- xml schema
- xpath queries
- xml query languages
- query processing
- native xml databases
- query decomposition
- keyword search
- relational model
- relational and xml data
- database systems
- database management systems
- semi structured data
- databases
- querying xml data
- database
- xml query evaluation
- labeling scheme
- hierarchical data
- relational database systems
- relational schema
- path expressions
- semi structured information
- xml data management
- query answering
- functional dependencies
- expressive power
- data integration