Keyphrases
- xml data
- xml documents
- xml databases
- data model
- xml queries
- xml keys
- relational databases
- query processing
- query evaluation
- query optimization
- relational data
- xml schema
- semi structured data
- relational and xml data
- query language
- query decomposition
- xpath queries
- relational database systems
- querying xml data
- keyword search
- xml query processing
- xml data sources
- database
- path expressions
- native xml
- object oriented
- databases
- labeling scheme
- relational schema
- twig queries
- database management systems
- native xml databases
- data management