Keyphrases
- document retrieval
- query processing
- inverted index
- query terms
- retrieval strategies
- result set
- query independent
- document collections
- language model
- relevant documents
- retrieval quality
- text retrieval
- information retrieval
- focused retrieval
- ranking functions
- retrieval model
- learning to rank
- user queries
- passage retrieval
- skyline queries
- query language
- pseudo relevance feedback
- query logs
- document indexing
- question answering systems
- information retrieval systems
- cross language
- range queries
- relevance model
- ad hoc retrieval
- search queries
- relevance feedback
- retrieved documents
- database systems
- web search engines
- spreading activation
- document ranking
- database
- retrieval systems
- machine learning
- decision trees
- feature extraction