Keyphrases
- passage retrieval
- document retrieval
- retrieval systems
- information retrieval systems
- information retrieval
- question answering
- structured documents
- retrieval model
- test collection
- trec web
- index terms
- document collections
- retrieval engine
- document content
- document indexing
- retrieval strategies
- query expansion
- text retrieval
- multimedia documents
- document structure
- effective retrieval
- document analysis
- trec genomics
- term weighting
- document level
- document ranking
- query specific
- retrieved documents
- retrieval effectiveness
- query terms
- relevance feedback
- image database
- web retrieval
- document images
- ad hoc retrieval
- relevant documents
- xml retrieval
- answer extraction
- language model
- handwritten documents
- content and structure
- text documents
- vector space model
- relevance model
- term frequency
- retrieval process
- question answering systems
- document clustering
- cross language
- average precision
- co occurrence
- multimedia