Keyphrases
- document retrieval
- document collections
- language model
- information retrieval
- text retrieval
- ranking functions
- retrieval model
- spreading activation
- document indexing
- relevant documents
- query terms
- relevance feedback
- inverted index
- pseudo relevance feedback
- query processing
- learning to rank
- cross language
- result set
- text classification
- co occurrence
- xml retrieval
- machine learning