Keyphrases
- xml data
- xml documents
- xml databases
- xml queries
- data model
- query optimization
- relational databases
- query processing
- query language
- query evaluation
- relational data
- relational and xml data
- metadata
- xml schema
- keyword search
- semi structured data
- query decomposition
- xpath queries
- semantic web
- relational tables
- standard for data exchange
- querying xml data
- databases
- path expressions
- xml query processing
- web services
- relational database systems
- native xml databases