Keyphrases
- ir models
- information retrieval
- retrieval model
- language model
- vector space model
- evaluation measures
- latent semantic indexing
- probabilistic model
- tf idf
- xml retrieval
- digital libraries
- metadata
- document retrieval
- term frequency
- vector space
- information retrieval systems
- information extraction
- query expansion
- database systems
- machine learning
- language modelling
- document representation
- relevant documents
- user queries
- web search
- text mining
- domain knowledge