Keyphrases
- semantic information
- term dependencies
- language model
- wordnet
- document retrieval
- domain knowledge
- contextual information
- metadata
- keywords
- vector space model
- retrieval effectiveness
- semantic similarity
- low level
- semantic meaning
- low level features
- language modeling
- high level
- syntactic information
- xml documents
- retrieval model
- visual information
- document collections
- machine translation
- relevance model
- information retrieval
- knowledge base