Keyphrases
- database
- keyword search
- query processing
- query evaluation
- query result
- xml documents
- xpath queries
- xml query processing
- path expressions
- semistructured data
- xml data
- response time
- data model
- relational databases
- query expansion
- data structure
- keyword queries
- markup language
- data retrieval
- query language for xml
- databases
- user queries
- relevance feedback
- keywords
- query execution
- xml views
- object oriented
- xml retrieval
- xml query languages
- query patterns
- query language
- ranked retrieval
- search engine
- xml format
- twig queries
- document structure
- metadata
- data exchange
- xml queries
- efficient processing
- information retrieval systems
- regular expressions
- retrieval systems