Keyphrases
- xml data
- query language
- query processing
- xml data sources
- efficient query processing
- xml documents
- data model
- xml fragments
- query optimization
- xml queries
- xml databases
- relational databases
- native xml databases
- query evaluation
- xml trees
- relational data
- xml schema
- querying xml data
- databases
- relational and xml data
- xpath queries
- semi structured data
- keyword search
- structured queries
- data structure
- relational database systems
- xml query processing
- xml query languages
- database systems
- queries on xml data
- path expressions
- query execution
- data management
- object oriented
- transitive closure
- native xml
- keyword queries
- graph databases
- semi structured