Keyphrases
- federated search
- resource selection
- web search
- digital libraries
- hierarchical peer to peer networks
- result merging
- search engine
- user queries
- information sources
- ranked list
- distributed information retrieval
- relevant documents
- query expansion
- web documents
- multilingual information retrieval
- search result
- peer to peer networks
- relational databases
- training set
- document ranking
- merging algorithm
- multimedia
- document retrieval
- information retrieval