Keyphrases
- xml data
- xml documents
- xml format
- query language
- data model
- xml queries
- xml query languages
- xml schema
- update operations
- xml processing
- xml databases
- query language for xml
- xml views
- xml query processing
- relational databases
- path expressions
- query evaluation
- native xml databases
- xml streams
- semistructured data
- object oriented
- semi structured data
- query processing
- document structure
- relational data
- relational algebra
- relational database systems
- twig queries
- relational model
- algebraic expressions
- relational and xml data
- xpath queries
- integrity constraints
- database management systems
- database
- query optimization
- sql queries
- data exchange
- xml query evaluation
- data retrieval
- expressive power
- metadata
- boolean algebra
- native xml
- algebraic structure
- relational data model
- object oriented databases
- semi structured
- xml dbms
- data types