Keyphrases
- path expressions
- xml data
- efficient query processing
- query language
- xml query languages
- xml documents
- xml queries
- query processing
- query evaluation
- native xml databases
- xml query processing
- xml databases
- xpath queries
- semi structured data
- data model
- recursive queries
- query optimization
- relational databases
- xml schema
- complex objects
- relational database systems
- query result
- relational data
- relational tables
- object oriented databases
- cost model
- regular path expressions
- database
- information retrieval
- inverted index
- keyword search
- query optimizer
- twig queries
- labeling scheme
- semistructured data
- data sources
- regular expressions
- range queries
- semi structured
- integrity constraints
- xpath expressions
- index structure
- database management systems
- data structure