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Ontology is the philosophical study of being.It is traditionally understood as the subdiscipline of metaphysics focused on the most general features of reality.As one of the most fundamental concepts, being encompasses all of reality and every entity within it.
More simply, an ontology is a way of showing the properties of a subject area and how they are related, by defining a set of terms and relational expressions that represent the entities in that subject area. The field which studies ontologies so conceived is sometimes referred to as applied ontology. [1]
Individuals (instances) are the basic, "ground level" components of an ontology. The individuals in an ontology may include concrete objects such as people, animals, tables, automobiles, molecules, and planets, as well as abstract individuals such as numbers and words (although there are differences of opinion as to whether numbers and words are classes or individuals).
In ontology, the theory of categories concerns itself with the categories of being: the highest genera or kinds of entities. [1] To investigate the categories of being, or simply categories, is to determine the most fundamental and the broadest classes of entities. [2]
Dominant approaches to ontology in the 20th century were phenomenology, linguistic analysis, and naturalism. Phenomenological ontology, as exemplified by Edmund Husserl and Martin Heidegger, relies for its method on the description of experience.
Example of a constructed MBED Top Level Ontology based on the nominal set of views. [1]In computer science, information science and systems engineering, ontology engineering is a field which studies the methods and methodologies for building ontologies, which encompasses a representation, formal naming and definition of the categories, properties and relations between the concepts, data and ...
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Carman elaborates: Heidegger's fundamental ontology is relevant to traditional ontology in that it concerns "what any understanding of entities necessarily presupposes, namely, our understanding of that in virtue of which entities are entities". [2] This ontological difference (German: ontologische Differenz) is central to Heidegger's philosophy.