Individuals, Classes, Attributes, Relations, Etc

Most ontologies use the same basic set of components. The first four are the “main” ones.

  • Individuals
    • Instances of a class
  • Classes (or “kinds”)
    • A kind of thing that can have properties (nouns)
  • Attributes
    • Properties that members of a class can have
  • Relations
    • How classes or individuals can relate to others
  • Restrictions
    • What must be true about something to be valid
  • Rules/Axioms
    • Logical statements describing inferences that can be made
  • Events
    • Changing of attributes or relations

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