Keyphrases
- xml data
- query language
- native xml databases
- query processing
- efficient query processing
- xml query processing
- xml documents
- xml databases
- xml queries
- data model
- semi structured data
- relational database systems
- query optimization
- query evaluation
- relational data
- keyword search
- relational databases
- relational and xml data
- query decomposition
- xml data sources
- querying xml data
- queries on xml data
- xml schema
- labeling scheme
- twig queries
- xml fragments
- databases
- xml trees
- database systems
- path expressions
- xpath queries
- database management systems
- data management
- data warehouse
- database