Keyphrases
- xml data
- xml documents
- xml databases
- xml queries
- relational data
- relational databases
- query optimization
- query evaluation
- data model
- relational and xml data
- query decomposition
- semi structured data
- query processing
- xml schema
- querying xml data
- xpath queries
- query language
- keyword search
- labeling scheme
- relational database systems
- native xml
- database
- xml keys
- semi structured information
- sql queries
- join algorithms
- query result
- text mining
- path expressions
- object oriented
- xml data sources