| (subclass PortCity City) | Transportation.kif 837-837 | Port city is a subclass of city |
| (subclass RiverPort PortCity) | Transportation.kif 852-852 | River port is a subclass of port city |
| (subclass SeaPort PortCity) | Transportation.kif 868-868 | Sea port is a subclass of port city |
| (subclass ContainerPort PortCity) | Transportation.kif 884-884 | Container port is a subclass of port city |
| (subclass DeepDraftPort PortCity) | Transportation.kif 887-887 | Deep draft port is a subclass of port city |
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