Keyphrases
- result merging
- federated search
- distributed information retrieval
- user queries
- query processing
- metasearch engine
- search engine
- result lists
- query expansion
- relevance feedback
- keyword search
- document ranking
- resource selection
- web search
- data objects
- search queries
- rank aggregation
- merging algorithm
- retrieval systems
- vector space
- query terms
- information retrieval systems