Keyphrases
- user friendly
- search strategies
- search interface
- search strategy
- user interface
- constraint programming
- heuristic search
- search methods
- search algorithm
- deep web
- evolutionary algorithm
- search engine
- search tasks
- databases
- branch and bound
- constraint satisfaction
- structured data
- retrieval effectiveness
- state space
- artificial intelligence
- web users
- active learning
- keyword queries
- search result
- expert systems
- digital libraries