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This is a simple information retrieval system that can be used to search for documents in a corpus. The system is based on the positional index data structure. The system is built using Node.js and Express.js. The system is built as a part of the course CS F313 Data Storage and Retrieval at Helwan University Software Engineering program 2023/2024.

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Adosh74/Information-Retrieval-System

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Information-Retrieval-System

Introduction

This is a simple information retrieval system that can be used to search for documents in a corpus. The system is based on the positional index data structure. The system is built using Node.js and Express.js. The system is built as a part of the course CS F313 Data Storage and Retrieval at Helwan University Software Engineering program 2023/2024.

PRD: Information Retrieval System

  1. ✅ Tokenization should be done using the following rules:

    • ✅ Splitting on whitespace.
    • ✅ Removing punctuation.
    • ✅ Removing stop words.
    • ✅ Stemming using the Porter Stemmer algorithm.
  2. Constructing Auxiliary structure(s) (Positional index) to speed up the search process should be done.

  3. Phrase query search should be supported using the positional index.

  4. Term frequency and inverse document frequency should be used to rank the documents in the corpus.

  5. Idf smoothing should be used to rank the documents.

  6. TF.idf matrix should be normalized using the cosine normalization technique.

  7. Similarity between query and each document should be computed using the cosine similarity measure.

  8. Boolean query search should be supported using the positional index.

API Documentation

Search

`GET` /search

body: {
    query: string
}

How to run and Install

# Clone the repo
git clone https://github.com/Adosh74/Information-Retrieval-System

# Install dependencies
yarn install
or
npm install

# Run the server
yarn start

# Run the server in development mode
yarn start:dev
  • After running the server, you can access the API through the following URL: http://localhost:3001

  • And display all PRD tables in console

Technologies and Tools

  • Node.js
  • Express.js
  • Typescript

About

This is a simple information retrieval system that can be used to search for documents in a corpus. The system is based on the positional index data structure. The system is built using Node.js and Express.js. The system is built as a part of the course CS F313 Data Storage and Retrieval at Helwan University Software Engineering program 2023/2024.

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