Keyphrases
- web databases
- deep web
- databases
- database systems
- user queries
- database server
- database
- database technology
- web pages
- query relaxation
- query interface
- web users
- data management
- key technologies
- structured data
- semi structured
- data sources
- data warehousing
- search engine
- web search
- web server
- data model
- information retrieval
- website