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