| direct-children | documentation | graph |
| Entity | 2 | The universal class of individuals. This is the root node of the ontology. | ^ |
| Physical | 5 | An entity that has a location in space-time. Note that locations are themselves understood to have ... | ^ |
| Object | 13 | Corresponds roughly to the class of ordinary objects. Examples include normal physical objects, geo... | ^ |
| ContentBearingPhysical | 6 | Any Object or Process that expresses content. This covers Objects that contain a Propositio... | ^ |
| Process | 16 | The class of things that happen and have temporal parts or stages. Examples include extended events... | ^ |
| PhysicalSystem | 8 | PhysicalSystem is the class of complex Physical things. A PhysicalSystem may have one or more... | ^ |
| FinancialAsset | 3 | Any item of economic value owned by an individual or corporation, especially that which could be co... | ^ |
