# ontology ## Summary Ontology is the study of what exists and how entities are categorized. It’s about being, existence, and the structure of reality—often forming the scaffolding for knowledge systems. ## Definition Ontology is a branch of philosophy that examines the nature of being, existence, and reality. It seeks to understand: - What kinds of things exist? - How are they grouped or categorized? - What are the fundamental entities of a system? In applied fields, ontology is often about **creating or adopting taxonomies**: how we define objects, roles, or concepts within a framework. For example, in tech or marketing, ontologies show up in **data models**, **brand architectures**, or **category design**—where deciding *what counts as a thing* is a core move. ## Properties - Ontology deals with *what is*, rather than how we come to know it. - It’s present in systems that require **classification**, **entity modeling**, or **structural design**. - It manifests in naming, defining categories, boundary-making, and the construction of “things” out of ideas. ## Related Ideas - Epistemology: how we come to know or believe what exists. - Taxonomy: systematic classification of entities. - Category design: shaping the perceived boundaries of a concept or product. - Information architecture: structuring knowledge systems or digital environments.