Keyphrases
- xpath queries
- xml documents
- xml data
- query processing
- query language
- query relaxation
- database
- xml query languages
- data model
- xml query processing
- query evaluation
- data retrieval
- database query languages
- relational database systems
- ranked retrieval
- xml trees
- databases
- relational database management systems
- structured documents
- xml queries
- efficient processing
- metadata
- xpath expressions
- path expressions
- database queries
- keyword queries
- native xml databases
- update operations
- user queries
- query result
- content and structure
- web search engines
- selectivity estimation
- xml databases
- database systems
- response time
- twig queries
- query patterns
- retrieval systems
- data exchange
- xml schema
- labeling scheme
- xml retrieval
- data integration
- xml format
- markup language
- relational databases
- range queries
- topic maps
- xquery full text