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Relationships
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| Instances | BodyOfWater | A BodyOfWater is a connected body of water with established boundaries marked by either geographical features or conventional borders. |
| | Entity | The universal class of individuals. This is the root node of the ontology. |
| | FlowRegion | FlowRegion is a class of things whose boundaries are relatively stable but whose constitutive material is continuously moving through the region itself and being replaced by other, similar material. Each FlowRegion is constituted by a stream of matter moving as a whole. A FlowRegion may be liquid or gaseous. A wind may be considered as a Process or as a FlowRegion, similarly an OceanCurrent or a WaterWave. The motion process associated with a FlowRegion F is denoted by (FlowFn F). Note that certain properties belong to the FlowRegion itself (e.g., mass, length, volume, temperature, and speed or velocity of the region moving as a whole), while other properties of interest belong to the Motion of its constitutive stuff (e.g., velocity, direction). The motion of a FlowRegion as a whole (e.g., JetStream moves within the atmosphere) is distinguished from the motion of the pieces of stuff constituting the FlowRegion. See FlowFn and FlowRegionFn. |
| | FreshWaterArea | A WaterArea whose Water is not saline, e.g. most rivers and lakes. |
| | GeographicArea | A geographic location, generally having definite boundaries. Note that this differs from its immediate superclass Region in that a GeographicArea is a three-dimensional Region of the earth. Accordingly, all astronomical objects other than earth and all one-dimensional and two-dimensional Regions are not classed under GeographicArea. |
| | Object | Corresponds roughly to the class of ordinary objects. Examples include normal physical objects, geographical regions, and locations of Processes, the complement of Objects in the Physical class. In a 4D ontology, an Object is something whose spatiotemporal extent is thought of as dividing into spatial parts roughly parallel to the time-axis. |
| | Physical | An entity that has a location in space-time. Note that locations are themselves understood to have a location in space-time. |
| | Region | A topographic location. Regions encompass surfaces of Objects, imaginary places, and GeographicAreas. Note that a Region is the only kind of Object which can be located at itself. Note too that Region is not a subclass of SelfConnectedObject, because some Regions, e.g. archipelagos, have parts which are not connected with one another. |
| | River | River is the class of large streams of fresh water flowing through land into a lake, ocean, or other body of water. |
| | SelfConnectedObject | A SelfConnectedObject is any Object that does not consist of two or more disconnected parts. |
| | StreamWaterArea | A relatively narrow WaterArea where the water flows constantly and in the same direction, e.g. a river, a stream, etc. |
| | WaterArea | A body which is made up predominantly of water, e.g. rivers, lakes, oceans, etc. |
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Belongs to Class
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SelfConnectedObject |
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