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Sigma KEE - Hole
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hole
A hole is an immaterial body located at the surface of an Object. Since every Hole is ontologically dependent on its host (i.e., the object in which it is a hole), being a Hole is defined as being a hole in something. Note that two Holes may occupy the same region, or part of the same region, without sharing any parts. Any two hosts of a hole have a common proper part that entirely hosts the hole. A common host of two holes hosts all parts of the sum of those holes. Any object that includes the host of a hole is a host of that hole, unless its parts also include parts of that very hole. Overlapping holes have overlapping hosts. No hole is atomic. Holes are connected with their hosts. No hole can have a proper part that is externally connected with exactly the same things as the hole itself.
Relationships      
Parents 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.
Children ATM slotA narrow opening in an ATM machine where cards are inserted.
 BodyOrificeAny Hole in the body of an Animal.
 burrowA small Hole created by an Animal for the purpose of inhabiting it.
 caveA Cave is a naturally formed opening beneath the surface of the Earth, generally formed by dissolution of carbonate bedrock. Caves may also form by erosion of coastal bedrock, partial melting of glaciers, or solidification of lava into hollow tubes.
 CrankcaseA Hole in an InternalCombustionEngine where the Piston rods join with the Crankshaft.
 glottisThe glottis is the opening between the vocal folds (the rima glottidis). The glottis is crucial in producing vowels and voiced consonants.[from Wikipedia]
 golf holeGolfHole refers to a type of Hole in the size of a GolfBall located in a PuttingGreen
 internal combustion chamberThe Hole that is part of a Cylinder in which Cumbustion occurs, forcing gases to expand and expelling the piston, to generate power.
 pupil


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