Keyphrases
- xml data
- xml documents
- xml databases
- data model
- xml queries
- query optimization
- relational databases
- query processing
- relational data
- semi structured data
- xml schema
- relational and xml data
- querying xml data
- query evaluation
- query language
- data integration
- query decomposition
- standard for data exchange
- keyword search
- xpath queries
- path expressions
- hierarchical data
- xml query processing
- native xml
- semi structured information
- database systems
- relational database systems
- native xml databases
- object oriented
- sql queries
- cost model