Keyphrases
- query language
- query evaluation
- query processing
- database
- user friendly
- user requests
- efficient processing
- user queries
- web search engines
- access control
- data sources
- mobile devices
- multi layer
- query interface
- technological innovation
- answering queries
- small and medium sized enterprises
- multiple users
- result set
- query terms
- information retrieval systems
- information retrieval