Keyphrases
- xml data
- efficient query processing
- xml documents
- query optimization
- xml databases
- query processing
- data model
- query language
- query evaluation
- keyword search
- xml queries
- relational databases
- semi structured data
- querying xml data
- relational data
- native xml databases
- database
- query decomposition
- relational and xml data
- xml schema
- xpath queries
- semi structured information
- inverted index
- information retrieval
- twig queries
- relational database systems
- xml query processing
- object retrieval
- cost model
- regular expressions
- queries on xml data
- xml data sources
- xml fragments
- xpath expressions
- databases