Keyphrases
- web databases
- deep web
- databases
- database systems
- database server
- user queries
- data management
- database technology
- query interface
- search engine
- web pages
- database
- web users
- data sources
- structured data
- key technologies
- query relaxation
- web search engines
- data integration
- data warehousing
- semi structured
- database applications
- data model
- data sets