What is ontology in simple terms?

Ontology, in its simplest form, can be thought of as the study of the nature of existence. It's the philosophical exploration of what entities exist, their properties, relationships, and how they interact with each other. In the context of blockchain and cryptocurrency, ontology refers to a framework or system that defines the rules, concepts, and structures that govern the creation, management, and use of digital assets. It essentially serves as a blueprint or foundation for building and maintaining a decentralized ecosystem where different entities can interact and transact in a secure, transparent, and efficient manner. Can you give me a real-world example of how ontology is applied in the cryptocurrency space?