Keyphrases
- focused retrieval
- passage retrieval
- document retrieval
- question answering
- information retrieval
- xml retrieval
- ad hoc retrieval
- similarity measure
- content and structure
- query expansion
- language model
- audio visual
- document image analysis
- document level
- retrieval model
- document structure
- quantitative evaluation
- free text
- natural language
- semantic relatedness
- probabilistic model
- relevant documents
- test collection
- document collections
- co occurrence
- natural language processing
- information extraction