Keyphrases
- web search
- search engine
- web search engines
- social annotations
- social interaction
- social networks
- web pages
- query logs
- search queries
- social media
- search result
- information retrieval
- ad hoc retrieval
- human behavior
- query processing
- online communities
- social networking
- virtual communities
- user defined
- highly relevant
- web information retrieval
- digital libraries