]> 2009/04/07 OpenCyc Knowledge Base Copyright© 2001-2009 Cycorp, Inc., http://www.cyc.com/, Austin, TX, USA This file contains an OWL representation of information contained in the OpenCyc Knowledge Base. The content of this OWL file is licensed under the Creative Commons Attribution 3.0 license whose text can be found at http://creativecommons.org/licenses/by/3.0/legalcode. The content of this OWL file, including the OpenCyc content it represents, constitutes the "Work" referred to in the Creative Commons license. The terms of this license equally apply to, without limitation, renamings and other logically equivalent reformulations of the content of this OWL file (or portions thereof) in any natural or formal language, as well as to derivations of this content or inclusion of it in other ontologies. Mappings between OpenCyc terms and Wikipedia article names provided by Olena Medelyan and Catherine Legg, University of Waikato, NZ under a Creative Commons Attribution 3.0 license. externalID A unique, language-neutral, variable-sized identifier for a concept that can be used to refer unambiguously to that concept across OWL exports or across Cyc inference engines. label A natural-language representation for a concept that is both human readable and readable by the Cyc inference engine. These terms are not guaranteed to refer to the same concept across time but are guaranteed to be consistent within a particular OWL export. Use 'cycAnnot:externalID' for unambiguously referring to a concept across OWL exports or across Cyc inference engines. DensityOfPopulation A <a href="http://sw.opencyc.org/concept/Mx4rwF4t15wpEbGdrcN5Y29ycA" class="cyc_term">TotallyOrderedQuantityType</a> (q.v.) and a specialization of <a href="http://sw.opencyc.org/concept/Mx4rhFtvNGqnQdeLusO9k_GjYA" class="cyc_term">RatioQuantity</a> (q.v.). Quantities that are instances of <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a> apply to (see <a href="http://sw.opencyc.org/concept/Mx4rwFbzwpwpEbGdrcN5Y29ycA" class="cyc_term">quantityRange</a>) <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a>s, and measure -- typically in a generic way (e.g. via a <a href="http://sw.opencyc.org/concept/Mx4rvyorqJwpEbGdrcN5Y29ycA" class="cyc_term">GenericValueFunction</a>) -- the number of human inhabitants per some (specified or unspecified) unit of area (e.g. <a href="http://sw.opencyc.org/concept/Mx4rvVkEI5wpEbGdrcN5Y29ycA" class="cyc_term">SquareMile</a>). Generic instances of <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a> include <a href="http://sw.opencyc.org/concept/Mx4rvViDVpwpEbGdrcN5Y29ycA" class="cyc_term">UrbanPopulationDensity</a> (defined to be equal to (<a href="http://sw.opencyc.org/concept/Mx4rwEJXrJwpEbGdrcN5Y29ycA" class="cyc_term">HighToVeryHighAmountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>)) and <a href="http://sw.opencyc.org/concept/Mx4rvViEm5wpEbGdrcN5Y29ycA" class="cyc_term">DesolateAreaPopulationDensity</a> (defined to be equal to (<a href="http://sw.opencyc.org/concept/Mx4rvgDE9ZwpEbGdrcN5Y29ycA" class="cyc_term">VeryLowAmountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>)). A non-generic instance is <pre> (<a href="http://sw.opencyc.org/concept/Mx4rvViAq5wpEbGdrcN5Y29ycA" class="cyc_term">QuotientFn</a> ((<a href="http://sw.opencyc.org/concept/Mx4r9er-nKUiQdiE-OdjE2nX7g" class="cyc_term">UnitOfCountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rIcwFloGUQdeMlsOWYLFB2w" class="cyc_term">HomoSapiens</a>) 1000) (<a href="http://sw.opencyc.org/concept/Mx4rvVkEI5wpEbGdrcN5Y29ycA" class="cyc_term">SquareMile</a> 1)) , </pre> the population density of 1000-people-per-square-mile. To relate a given region to a <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>, use the predicate <a href="http://sw.opencyc.org/concept/Mx4rvVjpq5wpEbGdrcN5Y29ycA" class="cyc_term">populationDensity</a>. See also <a href="http://sw.opencyc.org/concept/Mx4rWXNptNEtQdiY7_Ae47gy2g" class="cyc_term">populationOfRegion</a>, <a href="http://sw.opencyc.org/concept/Mx4rvwzAcJwpEbGdrcN5Y29ycA" class="cyc_term">populationGrowthRate</a>, and <a href="http://sw.opencyc.org/concept/Mx4rEMlkMm0LEdaSUACQJ4ev5g" class="cyc_term">populationRange</a>. density of population

Population density

http://en.wikipedia.org/wiki/Population_density UrbanPopulationDensity urban population density The population density of urban areas. The population density of rural areas. rural area population density RuralAreaPopulationDensity (LowToMediumAmountFn DensityOfPopulation) exurbia population density exurbia population density ExurbiaPopulationDensity The population density of exuburbian areas. a high level of density of population (HighAmountFn DensityOfPopulation) (MediumToHighAmountFn DensityOfPopulation) suburban population density (VeryLowAmountFn DensityOfPopulation) desolate area population density The population density of suburban areas. SuburbanPopulationDensity suburban population density rural area population density (VeryLowToLowAmountFn DensityOfPopulation) (HighToVeryHighAmountFn DensityOfPopulation) urban population density desolate area population density The population density of desolate areas like deserts or polar regions. DesolateAreaPopulationDensity non-negative quantity or number NonNegativeScalarInterval A specialization of <a href="http://sw.opencyc.org/concept/Mx4rvViAp5wpEbGdrcN5Y29ycA" class="cyc_term">ScalarInterval</a>. An instance INTERVAL of <a href="http://sw.opencyc.org/concept/Mx4rvViAp5wpEbGdrcN5Y29ycA" class="cyc_term">ScalarInterval</a> is also an instance of <a href="http://sw.opencyc.org/concept/Mx4rv3ockJwpEbGdrcN5Y29ycA" class="cyc_term">NonNegativeScalarInterval</a> just in case INTERVAL is a non-negative number or quantity. Instances of <a href="http://sw.opencyc.org/concept/Mx4rv3ockJwpEbGdrcN5Y29ycA" class="cyc_term">NonNegativeScalarInterval</a> include all instances of <a href="http://sw.opencyc.org/concept/Mx4rvVjyK5wpEbGdrcN5Y29ycA" class="cyc_term">NonNegativeNumber</a> (q.v.), as well as non-negative quantities such as (<a href="http://sw.opencyc.org/concept/Mx4rvVjRp5wpEbGdrcN5Y29ycA" class="cyc_term">Meter</a> 212), (<a href="http://sw.opencyc.org/concept/Mx4rvVi5sJwpEbGdrcN5Y29ycA" class="cyc_term">Kilogram</a> 5), and (<a href="http://sw.opencyc.org/concept/Mx4rvVjrsZwpEbGdrcN5Y29ycA" class="cyc_term">SecondsDuration</a> 0). geographical region A specialization of <a href="http://sw.opencyc.org/concept/Mx4rwLjlAJwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalThing</a> and <a href="http://sw.opencyc.org/concept/Mx4rvVkDZZwpEbGdrcN5Y29ycA" class="cyc_term">SurfaceRegion_Tangible</a>. Each instance of <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a> is a tangible spatial region that includes some piece of the surface of a planet (usually <a href="http://sw.opencyc.org/concept/Mx4rvVkL_pwpEbGdrcN5Y29ycA" class="cyc_term">PlanetEarth</a>), and may be represented on a map of the planet. This includes purely topographical regions like mountains and underwater spaces, places defined by demographics (e.g. language areas) and territory otherwise demarcated (e.g. <a href="http://sw.opencyc.org/concept/Mx4rwPvi0JwpEbGdrcN5Y29ycA" class="cyc_term">TimeZone</a>s). In "dualist" geopolitical contexts (see <a href="http://sw.opencyc.org/concept/Mx4rvnCA15wpEbGdrcN5Y29ycA" class="cyc_term">DualistGeopoliticalMt</a>, instances of <a href="http://sw.opencyc.org/concept/Mx4rvVjl2pwpEbGdrcN5Y29ycA" class="cyc_term">GeopoliticalEntity</a> are also considered to be instances of <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a>. In all cases the region in question must contain some tangible component with which it is possible to make physical contact. The instances of <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a> contrast in this respect with the instances of <a href="http://sw.opencyc.org/concept/Mx4rvc-YsJwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalThing_Intangible</a>, which are wholly intangible. Examples of <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a> include <a href="http://sw.opencyc.org/concept/Mx4rvVjOO5wpEbGdrcN5Y29ycA" class="cyc_term">RockyMountainStates_USRegion</a>, the <a href="http://sw.opencyc.org/concept/Mx4rv9tl95wpEbGdrcN5Y29ycA" class="cyc_term">ContinentOfAustralia</a>, <a href="http://sw.opencyc.org/concept/Mx4rvViO4pwpEbGdrcN5Y29ycA" class="cyc_term">SinaiPeninsula</a>, and -- in "dualist" geopolitical contexts -- <a href="http://sw.opencyc.org/concept/Mx4rvViC4ZwpEbGdrcN5Y29ycA" class="cyc_term">YaleUniversity</a> and <a href="http://sw.opencyc.org/concept/Mx4rvViBlpwpEbGdrcN5Y29ycA" class="cyc_term">CityOfPittsburghPA</a>. Some important types of regions are represented by the sub-collections <a href="http://sw.opencyc.org/concept/Mx4rvVj3CJwpEbGdrcN5Y29ycA" class="cyc_term">LanguageArea</a>, <a href="http://sw.opencyc.org/concept/Mx4rwPvi0JwpEbGdrcN5Y29ycA" class="cyc_term">TimeZone</a>, <a href="http://sw.opencyc.org/concept/Mx4rvWdbEZwpEbGdrcN5Y29ycA" class="cyc_term">PostalCodeRegion</a>, <a href="http://sw.opencyc.org/concept/Mx4rvVjKJ5wpEbGdrcN5Y29ycA" class="cyc_term">EcologicalRegion</a>, <a href="http://sw.opencyc.org/concept/Mx4rwP2CrJwpEbGdrcN5Y29ycA" class="cyc_term">ConstructionSite</a>, and -- in "dualist" geopolitical contexts -- <a href="http://sw.opencyc.org/concept/Mx4rvVjl2pwpEbGdrcN5Y29ycA" class="cyc_term">GeopoliticalEntity</a>. No instances of <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a> are wholly indoor locations. GeographicalRegion GeographicalQuantity A specialization of <a href="http://sw.opencyc.org/concept/Mx4rygxStLLcQdecMqyUNVYD1g" class="cyc_term">TangiblePhysicalQuantity</a>. Each instance of <a href="http://sw.opencyc.org/concept/Mx4riCJ1OnEuQdeeOJzun_J5YQ" class="cyc_term">GeographicalQuantity</a> is a <a href="http://sw.opencyc.org/concept/Mx4rhywBFkT6EdaAAACgye4oEQ" class="cyc_term">PhysicalQuantity</a> that can only characterize a <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a>. geographical quantity UnitOfMeasureConcept A <a href="http://sw.opencyc.org/concept/Mx4ret7qgOKgEdmAAAACs6hfSg" class="cyc_term">ConceptTypeByDomain</a> (q.v.). Instances of <a href="http://sw.opencyc.org/concept/Mx4rC-8cJgBpEdqAAAACs0uFOQ" class="cyc_term">UnitOfMeasureConcept</a> are collections and relations having to do with unit of measurement functions and the kinds of quantities they return as values. Important specializations and instances of <a href="http://sw.opencyc.org/concept/Mx4rvViAqpwpEbGdrcN5Y29ycA" class="cyc_term">UnitOfMeasure</a>, major specializations or <a href="http://sw.opencyc.org/concept/Mx4rvViAp5wpEbGdrcN5Y29ycA" class="cyc_term">ScalarInterval</a>, and relations that are important to measurement theory are instances of this collection. unit of measure concept A binary predicate that relates a <a href="http://sw.opencyc.org/concept/Mx4rvVkDZJwpEbGdrcN5Y29ycA" class="cyc_term">QuantityType</a> to a collection to which anything possessing a <a href="http://sw.opencyc.org/concept/Mx4rSGNLQK45EdqAAAACs6hRXg" class="cyc_term">Quantity</a> of that type belongs. <code>(<a href="http://sw.opencyc.org/concept/Mx4rwFbzwpwpEbGdrcN5Y29ycA" class="cyc_term">quantityRange</a> QUANTTYPE COL)</code> means that anything that is related to any instance of <code>QUANTTYPE</code> via some <a href="http://sw.opencyc.org/concept/Mx4rvViBYpwpEbGdrcN5Y29ycA" class="cyc_term">QuantitySlot</a> (q.v.) is itself an instance of <code>COL</code>. That is, for any thing <code>THING</code>, any instance <code>QUANT</code> of <code>QUANTTYPE</code>, and any quantity-slot <code>SLOT</code>, <code>(SLOT THING QUANT)</code> entails <code>(<a href="http://sw.opencyc.org/concept/Mx4rvViBBJwpEbGdrcN5Y29ycA" class="cyc_term">isa</a> THING COL)</code>. For example, <code>(<a href="http://sw.opencyc.org/concept/Mx4rwFbzwpwpEbGdrcN5Y29ycA" class="cyc_term">quantityRange</a> <a href="http://sw.opencyc.org/concept/Mx4rvVkEp5wpEbGdrcN5Y29ycA" class="cyc_term">Viscosity</a> <a href="http://sw.opencyc.org/concept/Mx4rvVj27ZwpEbGdrcN5Y29ycA" class="cyc_term">PartiallyTangible</a>)</code> means that only tangible things have viscosities. But note that it does not imply that all tangible things have viscosities. When making an assertion of the form <code>(<a href="http://sw.opencyc.org/concept/Mx4rwFbzwpwpEbGdrcN5Y29ycA" class="cyc_term">quantityRange</a> QUANTTYPE COL)</code> to the Cyc Knowledge Base it is normally advisable to select the most restricted collection possible (among those that are reified in the Cyc ontology) for <code>COL</code>. Quantity Range quantityRange DensityOfPopulation A <a href="http://sw.opencyc.org/concept/Mx4rwF4t15wpEbGdrcN5Y29ycA" class="cyc_term">TotallyOrderedQuantityType</a> (q.v.) and a specialization of <a href="http://sw.opencyc.org/concept/Mx4rhFtvNGqnQdeLusO9k_GjYA" class="cyc_term">RatioQuantity</a> (q.v.). Quantities that are instances of <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a> apply to (see <a href="http://sw.opencyc.org/concept/Mx4rwFbzwpwpEbGdrcN5Y29ycA" class="cyc_term">quantityRange</a>) <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a>s, and measure -- typically in a generic way (e.g. via a <a href="http://sw.opencyc.org/concept/Mx4rvyorqJwpEbGdrcN5Y29ycA" class="cyc_term">GenericValueFunction</a>) -- the number of human inhabitants per some (specified or unspecified) unit of area (e.g. <a href="http://sw.opencyc.org/concept/Mx4rvVkEI5wpEbGdrcN5Y29ycA" class="cyc_term">SquareMile</a>). Generic instances of <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a> include <a href="http://sw.opencyc.org/concept/Mx4rvViDVpwpEbGdrcN5Y29ycA" class="cyc_term">UrbanPopulationDensity</a> (defined to be equal to (<a href="http://sw.opencyc.org/concept/Mx4rwEJXrJwpEbGdrcN5Y29ycA" class="cyc_term">HighToVeryHighAmountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>)) and <a href="http://sw.opencyc.org/concept/Mx4rvViEm5wpEbGdrcN5Y29ycA" class="cyc_term">DesolateAreaPopulationDensity</a> (defined to be equal to (<a href="http://sw.opencyc.org/concept/Mx4rvgDE9ZwpEbGdrcN5Y29ycA" class="cyc_term">VeryLowAmountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>)). A non-generic instance is <pre> (<a href="http://sw.opencyc.org/concept/Mx4rvViAq5wpEbGdrcN5Y29ycA" class="cyc_term">QuotientFn</a> ((<a href="http://sw.opencyc.org/concept/Mx4r9er-nKUiQdiE-OdjE2nX7g" class="cyc_term">UnitOfCountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rIcwFloGUQdeMlsOWYLFB2w" class="cyc_term">HomoSapiens</a>) 1000) (<a href="http://sw.opencyc.org/concept/Mx4rvVkEI5wpEbGdrcN5Y29ycA" class="cyc_term">SquareMile</a> 1)) , </pre> the population density of 1000-people-per-square-mile. To relate a given region to a <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>, use the predicate <a href="http://sw.opencyc.org/concept/Mx4rvVjpq5wpEbGdrcN5Y29ycA" class="cyc_term">populationDensity</a>. See also <a href="http://sw.opencyc.org/concept/Mx4rWXNptNEtQdiY7_Ae47gy2g" class="cyc_term">populationOfRegion</a>, <a href="http://sw.opencyc.org/concept/Mx4rvwzAcJwpEbGdrcN5Y29ycA" class="cyc_term">populationGrowthRate</a>, and <a href="http://sw.opencyc.org/concept/Mx4rEMlkMm0LEdaSUACQJ4ev5g" class="cyc_term">populationRange</a>. density of population Wikipedia Article URL (<a href="http://sw.opencyc.org/concept/Mx4rNv0nbm4TTjOp7yhmnzOyqg" class="cyc_term">wikipediaArticleURL</a> THING URL) means that in <a href="http://sw.opencyc.org/concept/Mx4rtqXA6OC8QdiWC72DuLJdUw" class="cyc_term">Wikipedia_WebSite</a> THING is described by an article located at URL wikipediaArticleURL linear order attribute type TotallyOrderedQuantityType A collection of collections and a specialization of both <a href="http://sw.opencyc.org/concept/Mx4r91ZApkTvEdaAAACgye4oEQ" class="cyc_term">TotallyOrderedScalarIntervalType</a> and <a href="http://sw.opencyc.org/concept/Mx4rvVkDZJwpEbGdrcN5Y29ycA" class="cyc_term">QuantityType</a> (qq.v.). Each instance of <a href="http://sw.opencyc.org/concept/Mx4rwF4t15wpEbGdrcN5Y29ycA" class="cyc_term">TotallyOrderedQuantityType</a> is a totally-ordered collection of <a href="http://sw.opencyc.org/concept/Mx4rSGNLQK45EdqAAAACs6hRXg" class="cyc_term">Quantity</a>[ies], and thus an appropriate argument for a <a href="http://sw.opencyc.org/concept/Mx4rvyorqJwpEbGdrcN5Y29ycA" class="cyc_term">GenericValueFunction</a> (q.v.), such as <a href="http://sw.opencyc.org/concept/Mx4rvgDDa5wpEbGdrcN5Y29ycA" class="cyc_term">LowAmountFn</a> or <a href="http://sw.opencyc.org/concept/Mx4rpAl6tPLFQdeYfK2wZfrvag" class="cyc_term">MediumToHighAmountFn</a>. Instances of <a href="http://sw.opencyc.org/concept/Mx4rwF4t15wpEbGdrcN5Y29ycA" class="cyc_term">TotallyOrderedQuantityType</a> include <a href="http://sw.opencyc.org/concept/Mx4rvgEOkJwpEbGdrcN5Y29ycA" class="cyc_term">Toxicity</a>, <a href="http://sw.opencyc.org/concept/Mx4rv0H0z5wpEbGdrcN5Y29ycA" class="cyc_term">DiplomaticSupport</a>, and <a href="http://sw.opencyc.org/concept/Mx4rvi2nP5wpEbGdrcN5Y29ycA" class="cyc_term">LevelOfDifficulty</a>. Specializations include <a href="http://sw.opencyc.org/concept/Mx4rvViBKpwpEbGdrcN5Y29ycA" class="cyc_term">PrimitiveOrderedQuantityType</a> and <a href="http://sw.opencyc.org/concept/Mx4rlsKf-MukQdiEYr6WbI2G4Q" class="cyc_term">MeasurableQuantityType</a>. DensityOfPopulation A <a href="http://sw.opencyc.org/concept/Mx4rwF4t15wpEbGdrcN5Y29ycA" class="cyc_term">TotallyOrderedQuantityType</a> (q.v.) and a specialization of <a href="http://sw.opencyc.org/concept/Mx4rhFtvNGqnQdeLusO9k_GjYA" class="cyc_term">RatioQuantity</a> (q.v.). Quantities that are instances of <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a> apply to (see <a href="http://sw.opencyc.org/concept/Mx4rwFbzwpwpEbGdrcN5Y29ycA" class="cyc_term">quantityRange</a>) <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a>s, and measure -- typically in a generic way (e.g. via a <a href="http://sw.opencyc.org/concept/Mx4rvyorqJwpEbGdrcN5Y29ycA" class="cyc_term">GenericValueFunction</a>) -- the number of human inhabitants per some (specified or unspecified) unit of area (e.g. <a href="http://sw.opencyc.org/concept/Mx4rvVkEI5wpEbGdrcN5Y29ycA" class="cyc_term">SquareMile</a>). Generic instances of <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a> include <a href="http://sw.opencyc.org/concept/Mx4rvViDVpwpEbGdrcN5Y29ycA" class="cyc_term">UrbanPopulationDensity</a> (defined to be equal to (<a href="http://sw.opencyc.org/concept/Mx4rwEJXrJwpEbGdrcN5Y29ycA" class="cyc_term">HighToVeryHighAmountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>)) and <a href="http://sw.opencyc.org/concept/Mx4rvViEm5wpEbGdrcN5Y29ycA" class="cyc_term">DesolateAreaPopulationDensity</a> (defined to be equal to (<a href="http://sw.opencyc.org/concept/Mx4rvgDE9ZwpEbGdrcN5Y29ycA" class="cyc_term">VeryLowAmountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>)). A non-generic instance is <pre> (<a href="http://sw.opencyc.org/concept/Mx4rvViAq5wpEbGdrcN5Y29ycA" class="cyc_term">QuotientFn</a> ((<a href="http://sw.opencyc.org/concept/Mx4r9er-nKUiQdiE-OdjE2nX7g" class="cyc_term">UnitOfCountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rIcwFloGUQdeMlsOWYLFB2w" class="cyc_term">HomoSapiens</a>) 1000) (<a href="http://sw.opencyc.org/concept/Mx4rvVkEI5wpEbGdrcN5Y29ycA" class="cyc_term">SquareMile</a> 1)) , </pre> the population density of 1000-people-per-square-mile. To relate a given region to a <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>, use the predicate <a href="http://sw.opencyc.org/concept/Mx4rvVjpq5wpEbGdrcN5Y29ycA" class="cyc_term">populationDensity</a>. See also <a href="http://sw.opencyc.org/concept/Mx4rWXNptNEtQdiY7_Ae47gy2g" class="cyc_term">populationOfRegion</a>, <a href="http://sw.opencyc.org/concept/Mx4rvwzAcJwpEbGdrcN5Y29ycA" class="cyc_term">populationGrowthRate</a>, and <a href="http://sw.opencyc.org/concept/Mx4rEMlkMm0LEdaSUACQJ4ev5g" class="cyc_term">populationRange</a>. density of population DensityOfPopulation A <a href="http://sw.opencyc.org/concept/Mx4rwF4t15wpEbGdrcN5Y29ycA" class="cyc_term">TotallyOrderedQuantityType</a> (q.v.) and a specialization of <a href="http://sw.opencyc.org/concept/Mx4rhFtvNGqnQdeLusO9k_GjYA" class="cyc_term">RatioQuantity</a> (q.v.). Quantities that are instances of <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a> apply to (see <a href="http://sw.opencyc.org/concept/Mx4rwFbzwpwpEbGdrcN5Y29ycA" class="cyc_term">quantityRange</a>) <a href="http://sw.opencyc.org/concept/Mx4rvViACZwpEbGdrcN5Y29ycA" class="cyc_term">GeographicalRegion</a>s, and measure -- typically in a generic way (e.g. via a <a href="http://sw.opencyc.org/concept/Mx4rvyorqJwpEbGdrcN5Y29ycA" class="cyc_term">GenericValueFunction</a>) -- the number of human inhabitants per some (specified or unspecified) unit of area (e.g. <a href="http://sw.opencyc.org/concept/Mx4rvVkEI5wpEbGdrcN5Y29ycA" class="cyc_term">SquareMile</a>). Generic instances of <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a> include <a href="http://sw.opencyc.org/concept/Mx4rvViDVpwpEbGdrcN5Y29ycA" class="cyc_term">UrbanPopulationDensity</a> (defined to be equal to (<a href="http://sw.opencyc.org/concept/Mx4rwEJXrJwpEbGdrcN5Y29ycA" class="cyc_term">HighToVeryHighAmountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>)) and <a href="http://sw.opencyc.org/concept/Mx4rvViEm5wpEbGdrcN5Y29ycA" class="cyc_term">DesolateAreaPopulationDensity</a> (defined to be equal to (<a href="http://sw.opencyc.org/concept/Mx4rvgDE9ZwpEbGdrcN5Y29ycA" class="cyc_term">VeryLowAmountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>)). A non-generic instance is <pre> (<a href="http://sw.opencyc.org/concept/Mx4rvViAq5wpEbGdrcN5Y29ycA" class="cyc_term">QuotientFn</a> ((<a href="http://sw.opencyc.org/concept/Mx4r9er-nKUiQdiE-OdjE2nX7g" class="cyc_term">UnitOfCountFn</a> <a href="http://sw.opencyc.org/concept/Mx4rIcwFloGUQdeMlsOWYLFB2w" class="cyc_term">HomoSapiens</a>) 1000) (<a href="http://sw.opencyc.org/concept/Mx4rvVkEI5wpEbGdrcN5Y29ycA" class="cyc_term">SquareMile</a> 1)) , </pre> the population density of 1000-people-per-square-mile. To relate a given region to a <a href="http://sw.opencyc.org/concept/Mx4rvViDkZwpEbGdrcN5Y29ycA" class="cyc_term">DensityOfPopulation</a>, use the predicate <a href="http://sw.opencyc.org/concept/Mx4rvVjpq5wpEbGdrcN5Y29ycA" class="cyc_term">populationDensity</a>. See also <a href="http://sw.opencyc.org/concept/Mx4rWXNptNEtQdiY7_Ae47gy2g" class="cyc_term">populationOfRegion</a>, <a href="http://sw.opencyc.org/concept/Mx4rvwzAcJwpEbGdrcN5Y29ycA" class="cyc_term">populationGrowthRate</a>, and <a href="http://sw.opencyc.org/concept/Mx4rEMlkMm0LEdaSUACQJ4ev5g" class="cyc_term">populationRange</a>. density of population three dimensional quantity A specialization of <a href="http://sw.opencyc.org/concept/Mx4rU9w69qCIQdiaX7o2wbs-og" class="cyc_term">MultiDimensionalQuantity</a> (q.v.). Each instance of <a href="http://sw.opencyc.org/concept/Mx4r-7GRzKCIQdiHEaxh2Wf1-g" class="cyc_term">ThreeDimensionalQuantity</a> is a quantity that is derivable as the product or ratio of three <a href="http://sw.opencyc.org/concept/Mx4rUstvYKCIQdiBWaekaRIs-w" class="cyc_term">OneDimensionalQuantity</a>(ies) (q.v.). For example, (<a href="http://sw.opencyc.org/concept/Mx4rvVkCR5wpEbGdrcN5Y29ycA" class="cyc_term">MetersPerSecondPerSecond</a> 10) is a three-dimensional quantity obtainable by dividing (<a href="http://sw.opencyc.org/concept/Mx4rvVjRp5wpEbGdrcN5Y29ycA" class="cyc_term">Meter</a> 10) by (<a href="http://sw.opencyc.org/concept/Mx4rvVjrsZwpEbGdrcN5Y29ycA" class="cyc_term">SecondsDuration</a> 1), and then dividing that result by (<a href="http://sw.opencyc.org/concept/Mx4rvVjrsZwpEbGdrcN5Y29ycA" class="cyc_term">SecondsDuration</a> 1). And (<a href="http://sw.opencyc.org/concept/Mx4rvVjW4ZwpEbGdrcN5Y29ycA" class="cyc_term">CubicFoot</a> 8) is a three-dimensional quantity obtainable by multiplying (<a href="http://sw.opencyc.org/concept/Mx4rvVig45wpEbGdrcN5Y29ycA" class="cyc_term">Foot_UnitOfMeasure</a> 2) by itself twice. Each three-dimensional quantity is in principle equal to the result of applying some (reified or otherwise) <a href="http://sw.opencyc.org/concept/Mx4r1S-oSJ_CQdibSqQdUInRMA" class="cyc_term">ThreeDimensionalUnitOfMeasure</a> (q.v.) to some <a href="http://sw.opencyc.org/concept/Mx4rnVZQSiCmEdaAAACgyZzFrg" class="cyc_term">NumericInterval</a> (or pair of <a href="http://sw.opencyc.org/concept/Mx4rnVZQSiCmEdaAAACgyZzFrg" class="cyc_term">NumericInterval</a>s). When a <a href="http://sw.opencyc.org/concept/Mx4rVQ8MvqCIQdicLoOa1pZefg" class="cyc_term">TwoDimensionalQuantity</a> (q.v.) is multiplied or divided by (or divides) a <a href="http://sw.opencyc.org/concept/Mx4rUstvYKCIQdiBWaekaRIs-w" class="cyc_term">OneDimensionalQuantity</a>, the result is often (but not always) a three-dimensional quantity. (An example of an exception to this is (<a href="http://sw.opencyc.org/concept/Mx4rwHa2CZwpEbGdrcN5Y29ycA" class="cyc_term">ProductFn</a> (<a href="http://sw.opencyc.org/concept/Mx4rvVkDkZwpEbGdrcN5Y29ycA" class="cyc_term">MilesPerHour</a> 65) (<a href="http://sw.opencyc.org/concept/Mx4rvVjrNJwpEbGdrcN5Y29ycA" class="cyc_term">HoursDuration</a> 1)), which is equal to the one-dimensional quantity (<a href="http://sw.opencyc.org/concept/Mx4rvVi3VJwpEbGdrcN5Y29ycA" class="cyc_term">Mile</a> 65). Specializations of <a href="http://sw.opencyc.org/concept/Mx4r-7GRzKCIQdiHEaxh2Wf1-g" class="cyc_term">ThreeDimensionalQuantity</a> include <a href="http://sw.opencyc.org/concept/Mx4rvVju5JwpEbGdrcN5Y29ycA" class="cyc_term">Volume</a> and <a href="http://sw.opencyc.org/concept/Mx4rvVjciZwpEbGdrcN5Y29ycA" class="cyc_term">Acceleration</a>. ThreeDimensionalQuantity wikipediaArticleName (<a href="http://sw.opencyc.org/concept/Mx4rTv-jk9SPTXa991kk5mAvHg" class="cyc_term">wikipediaArticleName</a> THING NAME) means that in <a href="http://sw.opencyc.org/concept/Mx4rtqXA6OC8QdiWC72DuLJdUw" class="cyc_term">Wikipedia_WebSite</a> THING is described by an article with the title NAME Wikipedia Article Name A specialization of <a href="http://sw.opencyc.org/concept/Mx4rU9w69qCIQdiaX7o2wbs-og" class="cyc_term">MultiDimensionalQuantity</a> (q.v.). Each instance of <a href="http://sw.opencyc.org/concept/Mx4rhFtvNGqnQdeLusO9k_GjYA" class="cyc_term">RatioQuantity</a> is a quantity that is derivable (via <a href="http://sw.opencyc.org/concept/Mx4rvViAq5wpEbGdrcN5Y29ycA" class="cyc_term">QuotientFn</a>) as a ratio of other quantities. For example, (<a href="http://sw.opencyc.org/concept/Mx4rvVkDkZwpEbGdrcN5Y29ycA" class="cyc_term">MilesPerHour</a> 65) is a ratio quantity obtainable by dividing (<a href="http://sw.opencyc.org/concept/Mx4rvVi3VJwpEbGdrcN5Y29ycA" class="cyc_term">Mile</a> 65) by (<a href="http://sw.opencyc.org/concept/Mx4rvVjrNJwpEbGdrcN5Y29ycA" class="cyc_term">HoursDuration</a> 1); and (<a href="http://sw.opencyc.org/concept/Mx4rvViqP5wpEbGdrcN5Y29ycA" class="cyc_term">PoundsPerSquareInch</a> 50) is equal to <pre> (<a href="http://sw.opencyc.org/concept/Mx4rvViAq5wpEbGdrcN5Y29ycA" class="cyc_term">QuotientFn</a> (<a href="http://sw.opencyc.org/concept/Mx4rvVjHs5wpEbGdrcN5Y29ycA" class="cyc_term">Pound_UnitOfForce</a> 50) (<a href="http://sw.opencyc.org/concept/Mx4rvVjPkpwpEbGdrcN5Y29ycA" class="cyc_term">SquaredFn</a> (<a href="http://sw.opencyc.org/concept/Mx4rvVihIJwpEbGdrcN5Y29ycA" class="cyc_term">Inch</a> 1))) . </pre> Ratio quantities are used for measuring a difference or change in one quantity against a (usually incremental) difference or change in another quantity. When the later quantity is a <a href="http://sw.opencyc.org/concept/Mx4rvViApZwpEbGdrcN5Y29ycA" class="cyc_term">Time_Quantity</a> (as in the first example above), the ratio quantity is an instance of the specialization <a href="http://sw.opencyc.org/concept/Mx4rvVjrwpwpEbGdrcN5Y29ycA" class="cyc_term">Rate</a>. See also <a href="http://sw.opencyc.org/concept/Mx4rv3YfGZwpEbGdrcN5Y29ycA" class="cyc_term">PerFn</a>. ratio quantity RatioQuantity type of atemporal collection in which membership is necessarily essential AtemporalNecessarilyEssentialCollectionType A collection of collections. Each instance <code>COL</code> of <a href="http://sw.opencyc.org/concept/Mx4rqEYnNVMqEdaSKAACs0x8nw" class="cyc_term">AtemporalNecessarilyEssentialCollectionType</a> (ANECT) is a collection satisfying three conditions: (1) <code>COL</code> is disjoint with (see <a href="http://sw.opencyc.org/concept/Mx4rvViA45wpEbGdrcN5Y29ycA" class="cyc_term">disjointWith</a>) <a href="http://sw.opencyc.org/concept/Mx4rvViAxJwpEbGdrcN5Y29ycA" class="cyc_term">TemporalThing</a>, (2) every instance <code>INST</code> of <code>COL</code> is an instance of <code>COL</code> essentially (i.e. <code>INST</code> is an instance of <code>COL</code>, and could not exist without being an instance of <code>COL</code>), and (3) condition (2) is a necessary truth about <code>COL</code>. Positive examples of ANECTs include <a href="http://sw.opencyc.org/concept/Mx4rvViAzJwpEbGdrcN5Y29ycA" class="cyc_term">Collection</a>, <a href="http://sw.opencyc.org/concept/Mx4rvVieEpwpEbGdrcN5Y29ycA" class="cyc_term">Integer</a>, and <a href="http://sw.opencyc.org/concept/Mx4rvViAzZwpEbGdrcN5Y29ycA" class="cyc_term">Relation</a> (each of which is a collection of atemporals and is such that, necessarily, all of its instances are in it essentially). Negative examples include <a href="http://sw.opencyc.org/concept/Mx4rvVjpUZwpEbGdrcN5Y29ycA" class="cyc_term">SpatialThing</a> (though arguably it is necessary that all of its instances are essentially instances of it, it is not disjoint with <a href="http://sw.opencyc.org/concept/Mx4rvViAxJwpEbGdrcN5Y29ycA" class="cyc_term">TemporalThing</a>) and <a href="http://sw.opencyc.org/concept/Mx4rwP4FM5wpEbGdrcN5Y29ycA" class="cyc_term">UniqueAnatomicalPartType</a> (which, though disjoint with <a href="http://sw.opencyc.org/concept/Mx4rvViAxJwpEbGdrcN5Y29ycA" class="cyc_term">TemporalThing</a>, has instances, such as <a href="http://sw.opencyc.org/concept/Mx4rvVjvDpwpEbGdrcN5Y29ycA" class="cyc_term">Heart</a>, that could exist even if they weren't instances of it; e.g. it might have been the case that every creature with a heart had at least two hearts). There are no known examples of Cyc-reified collections satisfying conditions (1) and (2) but not (3), but one can be contrived. Suppose that all of today's winning lottery numbers were primes. Now consider the collection: (<a href="http://sw.opencyc.org/concept/Mx4rvrhK-JwpEbGdrcN5Y29ycA" class="cyc_term">CollectionUnionFn</a> (<a href="http://sw.opencyc.org/concept/Mx4rvVjkdpwpEbGdrcN5Y29ycA" class="cyc_term">TheSet</a> <a href="http://sw.opencyc.org/concept/Mx4rvVjrdZwpEbGdrcN5Y29ycA" class="cyc_term">PrimeNumber</a> TodaysWinningLotteryNumbers)) This collection is clearly disjoint with <a href="http://sw.opencyc.org/concept/Mx4rvViAxJwpEbGdrcN5Y29ycA" class="cyc_term">TemporalThing</a> and, by hypothesis, all of its instances are in it essentially (as each prime number is essentially a prime number). But this last fact is not necessarily true of this collection: the collection might have had instances that belonged to it only contingently (i.e. not essentially), as it might have been the case that one of today's winning lottery numbers was non-prime, and no number is such that it is essentially one of today's winning lottery numbers. When asserting that something is an instance or specialization of a given instance of ANECT, it is appropriate to do so in the <a href="http://sw.opencyc.org/concept/Mx4r3_SgQU2iEdaCwAACs0x8nw" class="cyc_term">UniversalVocabularyMt</a> (q.v.). Indeed, ANECT was specially defined to facilitate the movement of appropriate assertions to that microtheory. Cf. <a href="http://sw.opencyc.org/concept/Mx4rGeylLJTfEdqAAAACs0uFOQ" class="cyc_term">PragmaticallyDecontextualizedCollection</a>. non aspectual quantity A specialization of <a href="http://sw.opencyc.org/concept/Mx4rLxknOmVZQdeQUJLqO_1Uzg" class="cyc_term">ScalarQuantity</a> (q.v.). This is the collection of all "non-aspectual" quantities: those that can always be attributed to an object simpliciter, without specifying a particular aspect or dimension of the object that the quantity has to do with. For example, the degrees of <a href="http://sw.opencyc.org/concept/Mx4rvVj_hJwpEbGdrcN5Y29ycA" class="cyc_term">Flammability</a> are non-aspectual; an object could be attributed its flammability-level with a generic binary "hasQuantity" predicate. Conversely, a particular <a href="http://sw.opencyc.org/concept/Mx4rvViAmpwpEbGdrcN5Y29ycA" class="cyc_term">Distance</a> is aspect-relative; attributing a distance to any multi-dimensional object is relative to the dimension along which the distance is being measured (compare e.g. <a href="http://sw.opencyc.org/concept/Mx4rvVjbZpwpEbGdrcN5Y29ycA" class="cyc_term">lengthOfObject</a> and <a href="http://sw.opencyc.org/concept/Mx4rvVjgA5wpEbGdrcN5Y29ycA" class="cyc_term">widthOfObject</a>). NonAspectualQuantity