Keyphrases
- join algorithms
- xml data
- xml databases
- xml queries
- similarity join
- structural join
- query processing
- twig queries
- path expressions
- labeling scheme
- xpath expressions
- xml query processing
- xml documents
- query optimization
- cost model
- efficient processing
- data model
- xml query evaluation
- semi structured data
- join operations
- query evaluation
- xml schema
- keyword search
- relational databases
- relational data
- relational database systems
- main memory
- spatial join
- query language
- b tree
- query execution
- xml trees
- xpath queries
- database management systems
- materialized views
- database