Download the data
wget http://crystal.exp.sis.pitt.edu:8080/iris/data.rar
rar x data.rar
wget http://crystal.exp.sis.pitt.edu:8080/iris/result_data.rar
rar x result_data.rarSection1: Reading documents from collection files and reading documents from collection files.
Section2: Build an index and retrieve posting lists of tokens from an index.
Section3: Automatically translate topic statements to queries and implementing the statistical language model.
Section4: Implement relevance feedback for language model.