Keyphrases
- information retrieval
- information retrieval systems
- storage and retrieval
- data storage
- learning to rank
- search engine
- information access
- hierarchical structure
- hierarchical clustering
- text mining
- storage requirements
- language model
- coarse to fine
- storage space
- language modeling
- probability ranking principle
- storage management
- hierarchical classification
- natural language
- latent semantic indexing
- recommender systems
- test collection
- information seeking
- text retrieval
- retrieval model
- document retrieval