Keyphrases
- xml data
- keyword search
- xml documents
- xml databases
- query processing
- disk space
- data model
- relational databases
- labeling scheme
- xml queries
- xml keyword search
- query optimization
- query evaluation
- relational data
- native xml databases
- path expressions
- path queries
- xpath expressions
- semi structured data
- xml schema
- query language
- xpath queries
- xml query evaluation
- efficient query processing
- query decomposition
- xml fragments
- relational and xml data
- index structure
- querying xml data
- keywords
- xml query processing
- databases
- materialized views
- relational database systems
- database
- xml query languages
- efficient processing
- keyword queries
- native xml
- indexing techniques
- user queries
- database management systems