This software was created as a submission to an assignment given as a part of the course called Information Retrieval, taught at BITS Pilani Hyderabad Campus

##Pre-requisites:## Before running the software please make sure you have nltk package installed. Also make sure you have downloaded nltk's brown corpus.

##How to run:## Run following command in a terminal:

$python run.py

##Files:## indexer.py: This module generates tokens out of the documents and creates necessary data structures and also serialize those data structures. \nThis module ultimately creates the inverted indexes needed for further processing.

normalize.py: This module helps to calculate normalized vectors of each document based on the inverted indexes.

query.py: This module helps the user to query the corpus and fetch the relevant documents

first_run.indicator: Indicates if the software is running for the first time. If so, the system would creates tokens and create indexes in a fresh manner. If not, it would just use the indexes already built.