Keyphrases
- xml data
- efficient query processing
- xml documents
- xml databases
- native xml databases
- data model
- query optimization
- xml queries
- relational databases
- query processing
- query evaluation
- relational data
- semi structured data
- query language
- information retrieval
- database
- query decomposition
- relational and xml data
- xpath queries
- xml query processing
- keyword search
- relational database systems
- querying xml data
- path expressions
- object retrieval
- twig queries
- xml schema
- native xml
- semi structured information
- text mining
- database systems
- queries on xml data
- standard for data exchange
- inverted index
- xml data sources
- xml query languages
- information extraction
- databases