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Design AI ontologies with Ontology-Playground

Developed by Microsoft, Ontology-Playground is an open source web application used to learn ontologies and create visual designs on Microsoft Fabric IQ. This completely static tool allows users to design ontology models, export them in RDF/XML format and share interactive diagrams.

Updates

  • September 30, 2026: Stars 1,806 → 2,806.

What you get

  • Create ontology models with visual interface
  • Export to RDF/XML format
  • Explore data with interactive diagrams

Installation

Installing the project in a local environment
cd Ontology-Playground
npm install
Starting the development server
npm run dev

If you don't write code

Paste this into your AI agent (Claude Code · Codex · Antigravity)

I want to design an ontology using Ontology-Playground. Load the starter template by selecting a field such as Retail, Healthcare, or Finance. Then, add new entity types to this template, define the relationships between them, and show me the steps I need to export this model I created in RDF/XML format.

Repository: https://github.com/microsoft/Ontology-Playground. Follow the official instructions in the README of this repository for setup and execution.

Before starting, check which OS we are on and if the necessary tools (e.g., Python, Node.js, Git, Docker) are installed. Install any missing ones step-by-step according to this system.

Create a new, empty folder to work in. Do not touch any files outside this folder and do not delete anything. Tell me what you are going to do in one sentence before running each command.

Tell me what I should see on the screen at the end of each step. If an error occurs, I will paste the error message to you exactly as it is, and we will fix it together.

Related dictionary terms

Artificial Intelligence
Who it is forSuitable for developers and researchers interested in data modeling, ontology design, and the Microsoft Fabric IQ ecosystem.
LicenseMIT

Links

TreScout did not build this tool · we found it in GitHub trends and wrote it up. This page describes the repository as of 2026-07-21: The star count and our text belong to that day, the repository may have changed since. Check the repository link for the current state. The introductory text was prepared with AI from the repository's own documentation, and this page was machine-translated from the Turkish original · the Turkish version prevails.