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.
||CommercialAgent||An Agent that provides products and/or services for a fee with the aim of making a profit.|
| ||GeopoliticalArea||Any GeographicArea which is associated with some sort of political structure. This class includes LandArea, Cities, districts of cities, counties, etc. Note that the identity of a GeopoliticalArea may remain constant after a change in borders.|
| ||Group||A Collection of Agents, e.g. a flock of sheep, a herd of goats, or the local Boy Scout troop.|
| ||ITAgent||agent capable of performing ITProcess|
| ||Organism||Generally, a living individual, including all Plants and Animals.|
| ||Organization||An Organization is a corporate or similar institution. The members of an Organization typically have a common purpose or function. Note that this class also covers divisions, departments, etc. of organizations. For example, both the Shell Oil Corporation and the accounting department at Shell would both be instances of Organization. Note too that the existence of an Organization is dependent on the existence of at least one member (since Organization is a subclass of Collection). Accordingly, in cases of purely legal organizations, a fictitious member should be assumed.|
| ||SentientAgent||A SentientAgent is an Agent that is capable of Perception and experiences some level of consciousness (see ConsciousnessAttribute). If the Agent is able to reason at a comparatively high level (evinced by the ability to learn, plan, and feel emotions), then it is also an instance of CognitiveAgent. A DomesticAnimal is a SentientAgent, but may or may not be a CognitiveAgent, depending on the type of Animal.|