Keyphrases
- xml data
- schema mappings
- peer to peer
- xml queries
- data exchange
- xml schema
- xml documents
- xml databases
- query evaluation
- data model
- query optimization
- data integration
- relational databases
- query decomposition
- data complexity
- querying xml data
- query processing
- query language
- xpath queries
- relational data
- keyword search
- relational database systems
- database schema
- data mining
- semantic information
- building blocks
- data management
- labeling scheme
- path expressions
- databases
- data sets