| direct-children | documentation | graph |
| Entity | 2 | The universal class of individuals. This is the root node of the ontology. | ^ |
| Abstract | 8 | Properties or qualities as distinguished from any particular embodiment of the properties/qualities... | ^ |
| ProcessTask | 2 | A function to be performed. | ^ |
| Quantity | 6 | Any specification of how many or how much of something there is. Accordingly, there are two subclas... | ^ |
| Attribute | 22 | Qualities which we cannot or choose not to reify into subclasses of. | ^ |
| SetOrClass | 2 | The SetOrClass of Sets and Classes, i.e. any instance of Abstract that has elements or ... | ^ |
| Relation | 16 | The Class of relations. There are two kinds of Relation: Predicate and Function. Predicat... | ^ |
| List | 9 | Every List is a particular ordered n-tuple of items. Generally speaking, Lists are created by m... | ^ |
| Proposition | 26 | Propositions are Abstract entities that express a complete thought or a set of such thoughts. A... | ^ |
| Model | 5 | An abstract object that models certain aspect of a physical object, is subject to abstraction and i... | ^ |
