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Similarity Flooding

Python3 implementation of the Similarity Flooding algorithm (S. Melnik, H. Garcia-Molina, E. Rahm "Similarity Flooding: A Versatile Graph Matching Algorithm")

Table of Contents

  1. Project Description
  2. Installation
  3. Usage
  4. Credits

Project Description

The project implements the Similarity Flooding algorithm as explained in the paper "Similarity Flooding: A Versatile Graph Matching Algorithm", by S. Melnik, H Garcia-Molina and E. Rahm. The implementation is written in Python3, relying mostly on the NetworkX library to easily create the necessary graphs.

The project is separated in various modules that should be imported separately, for additional information refer to the Usage section.

This work has been done for the "Progetto di Ingegneria Informatica" course (Computer Engineering Project) in Politecnico di Milano.

Installation

Python3 is required to run the project, please refer to the Python website for additional information on how to install Python.

It is advised to use Pipenv to manage the project dependencies:

If you do not have Pipenv installed:

$ pip install pipenv

After installing pipenv, move to the project directory and install the required dependencies:

$ cd SimilarityFlooding
$ pipenv install

You should now be able to run the main.py file:

$ pipenv run python3 main.py

Usage

The modules contained in the top level package similarityflooding are the following:

  • parse: contains all parser for various schema formats (Namely: SQL DDL, XML and XDR)
  • initialmap: contains the modules required to compute the initial mapping for the algorithm
  • sf: contains the modules required for the actual similarity flooding computation
  • filter: contains the modules required to compute the final results
  • utils: contains various modules useful to the entire project

In general the flow is the following:

  • Choose a parse module to receive a graph from the desired schema format
  • Eventually compress the graph (see the report for additional information)
  • Create a SFGraphs object
  • Run the similarity flooding algorithm by providing the SFGraphs object
  • Execute the final filter

For an example usage, please refer to the main.py file.

Credits