SUMO   View all facts   Glossary   Help

Entity > Physical

Physical
subject			fact

Physical	documentation An entity that has a location in space-time. Note that locations are themselves understood to have a location in space-tim
	has axiom (<=> (instance ?PHYS Physical) (exists (?LOC ?TIME) (and (located ?PHYS ?LOC) (existant ?PHYS ?TIME))))
	has axiom (=> (and (holdsDuring ?INTERVAL (holds ?REL ?INST1 ?INST2)) (temporalPart ?POINT ?INTERVAL) (instance ?INST1 Physical) (instance ?INST2 Physical)) (and (existant ?INST1 ?POINT) (existant ?INST2 ?POINT)))
	is first domain of cooccur
	is first domain of date
	is first domain of distance
	is first domain of existant
	is first domain of hasPurpose
	is first domain of hasPurposeForAgent
	is first domain of located
	is first domain of property
	is first domain of refers
	is first domain of represents
	is first domain of representsForAgent
	is first domain of representsInLanguage
	is first domain of time
	is first domain of WhenFn
	is first domain of WhereFn
	is second domain of cooccur
	is second domain of distance
	is a kind of Entity

Kinds of Physical :

• Object (123 kinds, 596 facts) - Corresponds roughly to the class of ordinary physical objects. An Object is thought of as continuing through time, but at any particular time is all there is at that time, in contrast to something that is thought of as being divided into stages (contrast Process). Examples include normal physical objects, geographical regions, and locations of Processes. The formal definition is that all the parts of an Object are present at the same time that the Object is; in other words, an Object cannot have 'parts' which are separated in time, such as the first and second halves of a football game. Note that the parts of an Object may change from time to time, and that every Object occupies exactly the same space and time as a Process (its lifespan). 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
• Process (150 kinds, 452 facts) - Intuitively, the class of things that happen rather than endure. A Process is thought of as having temporal parts or stages, and so it cannot have all these parts together at one time (contrast Object). Examples include extended 'events' such as a football match or a race, events and actions of various kinds, states of motion and lifespans of Objects, which occupy the same space and time but are thought of as having stages instead of parts. The formal definition is: anything that lasts for a time but is not an Object. Note that a Process may have participants 'inside' it which are Objects, such as the players in a football match. In a 4D ontology, a Process is something whose spatiotemporal extent is thought of as dividing into temporal stages roughly perpendicular to the time-axis

Next Entity: Abstract    Up: Entity