Keyphrases
- xml retrieval
- information retrieval systems
- information retrieval
- retrieval systems
- test collection
- xml information retrieval
- structured document retrieval
- document collections
- entity ranking
- document retrieval
- content and structure
- blind feedback
- content oriented xml retrieval
- focused retrieval
- xml elements
- relevance assessments
- retrieval model
- web search engines
- feature selection
- learning algorithm