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Relationships
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| Instances | Abstract | Properties or qualities as distinguished from any particular embodiment of the properties/qualities in a physical medium. Instances of Abstract can be said to exist in the same sense as mathematical objects such as sets and relations, but they cannot exist at a particular place and time without some physical encoding or embodiment. |
| | Entity | The universal class of individuals. This is the root node of the ontology. |
| | 物理尺寸 | A physical dimension such as length, mass, force etc. |
| | Quantity | Any specification of how many or how much of something there is. Accordingly, there are two subclasses of Quantity: Number (how many) and PhysicalQuantity (how much). |
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Belongs to Class
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Entity |
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