From Hierarchies to Logic — The Next Step in Ontology Engineering
Build connected, governed, and semantically rich knowledge models with Protégé and the classic pizza.owl tutorial.
This is Volume 2 of a comprehensive guide that transforms the legendary pizza.owl tutorial into a structured, professional learning experience. Building on the foundational skills from Volume 1 (classes, reasoning, RDF), this volume guides you through the full spectrum of semantic relationships — from object properties to inverse properties, property characteristics, domain and range, and finally to existential and universal restrictions.
What you will learn in Volume 2:
- Create semantic relationships using object properties — the connective tissue of any ontology.
- Enable bidirectional navigation with inverse properties, making knowledge traversable and queries more intuitive.
- Govern relationship behavior through property characteristics — functional, symmetric, transitive, and more — transforming a static graph into a governed, reasoning-aware network.
- Define semantic boundaries using domain and range, ensuring relationships connect the right kinds of concepts.
- Express semantic requirements with OWL restrictions — moving from describing what may exist to defining what must and may only exist.
- Connect every concept to the Executable Knowledge Architecture (EKA) framework, bridging ontology engineering with enterprise knowledge systems.
Why Volume 2?
- Covers the heart of OWL modeling: properties, characteristics, boundaries, and logical restrictions.
- Includes hands-on exercises, SPARQL queries, and Neo4j integration examples.
- Written by a Global Enterprise Architect with 30 years of industry experience.
- Backed by open-source code, video tutorials, and a supportive GitHub community.
Who this book is for:
Enterprise architects, AI engineers, data architects, knowledge graph practitioners, and anyone who wants to build machine-readable meaning that systems can act on. Completion of Volume 1 (or equivalent Protégé experience) is recommended.
Includes lifetime updates. Buy once, read forever.
The journey begins with pizza. But the real subject is meaning.
