protege_pizza

🍕 Protégé Pizza Ontology: Master Semantic Modeling

Welcome to the ultimate hands-on guide for learning Ontology Engineering using the famous pizza.owl tutorial. This repository is designed to take you from a complete beginner to an advanced user of Protégé, the world’s most popular ontology editor.

🎉 We’ve reached 115 stars on GitHub! Thank you for your support.

🌟 Why Learn Ontology & Protégé?

In the era of AI and Large Language Models (LLMs), Ontologies provide the structured “world knowledge” that machines need to reason. By mastering this tutorial, you will learn how to:

• Define complex hierarchies and relationships.
• Use Reasoners to automatically classify data.
• Write SWRL rules to add intelligent logic.
• Build the backbone of Knowledge Graphs.

🎓 The Learning Path

This repository is a companion to my comprehensive video course. I recommend following the videos while using the snapshot models in this repo to check your work.

📺 Watch the Full Course:

Protégé 5.x Pizza Tutorial Video Series

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📘 Companion eBook Now Available!

Take your ontology engineering skills to the next level with the official companion eBook: “Pizza OWL Ontology Practice”.

Whether you want an offline, step-by-step text guide to match the video series or deeper conceptual explanations of Description Logics, this book is your perfect desk reference.

• Read the Source & Materials: Check out the /ebook directory right here in this repository.
• Get the Complete Digital Edition: Available now on Leanpub in PDF, EPUB, and MOBI formats!

👉 Grab your copy on Leanpub: Pizza OWL Ontology Practice By purchasing the book on Leanpub, you get access to lifetime free updates as the tutorial evolves and directly support the creation of more open-source semantic web content!

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🛠 Repository Structure

I have tracked my progress step-by-step. You can jump into any stage of the tutorial by using the files in:

• /snapshot_models: RDF/OWL files at various stages of the tutorial.
• /ontology_ref: Reference materials and SHACL shapes.
• Protege 5 New OWL Pizza Tutorial V3.2.pdf: The core manual based on Michael DeBellis’ guide.

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🚀 Getting Started

1. Setup

• Download Protégé.
• Install a reasoner like HermiT or Pellet (included in most Protégé versions).

2. Modules & Curriculum

| Phase | Topics Covered | Key Videos | | :— | :— | :— | | Foundations | Classes, Subclasses, and Disjointness | 01 - 09 | | Properties | Object Properties, Domains, and Ranges | 10 - 13 | | Logic | Existential & Universal Restrictions | 14 - 24 | | Advanced | SWRL Rules, SPARQL Queries, and SHACL | 37 - 42 | | Cloud | WebProtégé & WebVOWL | 43 - 45 |

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🧠 Key Concepts Covered

• Taxonomies vs. Ontologies: Moving beyond simple hierarchies to complex logic.
• Open World Assumption: Understanding how OWL reasoning differs from traditional databases.
• Description Logic (DL): Learning to query your knowledge base effectively.
• SWRL & SQWRL: Adding “If-Then” rules to your ontology.

🔗 Resources & Credits

• Original Guide: Based on Michael DeBellis’ excellent Protégé OWL tutorial.
• Mind Map: Use the pizza.owl tutorial.mm (Open with FreePlane) for a visual overview.
• Visualization: View the model via WebVOWL.

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🤝 Contributing & Support

If you find this tutorial helpful, please:

1. ⭐ Star this repository to help others find it.
2. 📺 Subscribe to the YouTube Channel for future updates and courses.
3. 📘 Buy the Book: Support my work by picking up a copy of Pizza OWL Ontology Practice on Leanpub.
4. 💬 Feel free to open an Issue if you have questions about the modeling steps.

Happy Pizza Modeling! 🍕

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Last updated at 2026-05-17

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