Keyphrases
- xml documents
- xml data
- native xml databases
- xpath queries
- xml queries
- xml streams
- xpath expressions
- xml data management
- xml databases
- xml processing
- efficient query processing
- xml schema
- xml query languages
- path expressions
- relational databases
- native xml
- structured data
- database
- query evaluation
- keyword search
- query language
- data model
- xml trees
- xml fragments
- query processing
- information retrieval
- high level
- data interchange
- twig queries
- semi structured data
- xml format
- relational data
- query processor
- integrity constraints
- database systems
- xml query processing
- conceptual model
- query optimization
- transitive closure
- data exchange
- querying xml data
- extensible markup language
- markup language
- semi structured
- object oriented
- databases