]> 2008/06/10 OpenCyc Knowledge Base Copyright© 2001-2008 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. 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. CommonSubstances-Material-Topic common substances material topic

oxide Oxide An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViGSpwpEbGdrcN5Y29ycA" class="cyc_term">TangibleStuffCompositionType</a> and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkF6pwpEbGdrcN5Y29ycA" class="cyc_term">InanimateObject</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVi-kZwpEbGdrcN5Y29ycA" class="cyc_term">Oxide</a> is a portion of stuff in which each molecule consists of a combination of oxygen atoms with one or more atoms of another element. Specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVi-kZwpEbGdrcN5Y29ycA" class="cyc_term">Oxide</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVj8YZwpEbGdrcN5Y29ycA" class="cyc_term">IronOxide</a> (i.e. rust), <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVi_2ZwpEbGdrcN5Y29ycA" class="cyc_term">CarbonDioxide</a>, and (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwPuxrZwpEbGdrcN5Y29ycA" class="cyc_term">PureFn</a> <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjAHZwpEbGdrcN5Y29ycA" class="cyc_term">Water</a>) (i.e. the collection of portions of chemically pure water).

Glass glass A specialization of #$InorganicStuff. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViG-5wpEbGdrcN5Y29ycA" class="cyc_term">Glass</a> is a piece of glass; e.g., a wine bottle, a plate glass window, a microscope slide, a crystal water goblet, or the mirrors of a reflecting telescope.

Cloth cloth <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkJCZwpEbGdrcN5Y29ycA" class="cyc_term">Cloth</a> is a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVibU5wpEbGdrcN5Y29ycA" class="cyc_term">TextileArtifact</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkJCZwpEbGdrcN5Y29ycA" class="cyc_term">Cloth</a> is a piece of textile sheet woven or knitted or pressed out of fibers. Instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkJCZwpEbGdrcN5Y29ycA" class="cyc_term">Cloth</a> are commonly used as material inputs to the manufacture of such things as clothing items, towels, sails for sailing craft, parachutes, and draperies.

A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViSPpwpEbGdrcN5Y29ycA" class="cyc_term">PlantProduct</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimxJwpEbGdrcN5Y29ycA" class="cyc_term">Wood</a> is a piece of solid, rigid, fibrous organic substance in or <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViVmZwpEbGdrcN5Y29ycA" class="cyc_term">derivedFrom</a> (q.v.) the inside of the trunks and limbs of trees. Specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimxJwpEbGdrcN5Y29ycA" class="cyc_term">Wood</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwPRtUZwpEbGdrcN5Y29ycA" class="cyc_term">Firewood</a>, (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVio85wpEbGdrcN5Y29ycA" class="cyc_term">WoodFn</a> <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjB35wpEbGdrcN5Y29ycA" class="cyc_term">OakTree</a>) and (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVio85wpEbGdrcN5Y29ycA" class="cyc_term">WoodFn</a> <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwPvUq5wpEbGdrcN5Y29ycA" class="cyc_term">CherryTree</a>). Wood wood

concrete <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkDYJwpEbGdrcN5Y29ycA" class="cyc_term">Concrete</a> is a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkCIpwpEbGdrcN5Y29ycA" class="cyc_term">ArtificialMaterial</a> and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwQr0i5wpEbGdrcN5Y29ycA" class="cyc_term">BuildingMaterial</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkDYJwpEbGdrcN5Y29ycA" class="cyc_term">Concrete</a> is a piece of an artificial mixture of cement, gravel, sand, and (during mixture, pouring, and forming) water. Used widely in construction, pieces of concrete are formed into the desired shape while fluid and afterward hardened into a sturdy, durable material. Instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkDYJwpEbGdrcN5Y29ycA" class="cyc_term">Concrete</a> include bridge pilings, foundations of houses, and sidewalks. Concrete

Air A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjFK5wpEbGdrcN5Y29ycA" class="cyc_term">GaseousTangibleThing</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjADJwpEbGdrcN5Y29ycA" class="cyc_term">Air</a> is one 'piece' among all the portions of the atmosphere of the Earth, considered as a substance present in various places, in various quantities, under various pressures, etc. Examples: the AirInAustin; the stuffy air in my office; the thin air atop Annapurna. See also <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjU2pwpEbGdrcN5Y29ycA" class="cyc_term">TheEarthsAtmosphere</a>, which is all ambient <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjADJwpEbGdrcN5Y29ycA" class="cyc_term">Air</a> on the planet taken as a single object. air

Water An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvUCoPtoTQdaZVdw2OtjsAg" class="cyc_term">ChemicalCompoundTypeByChemicalSpecies</a> and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkF6pwpEbGdrcN5Y29ycA" class="cyc_term">InanimateObject</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjAHZwpEbGdrcN5Y29ycA" class="cyc_term">Water</a> is one piece of some (pure or impure) portion of the chemical compound H2O. Instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjAHZwpEbGdrcN5Y29ycA" class="cyc_term">Water</a> may be in a gaseous, liquid, or solid state (see <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVi9HJwpEbGdrcN5Y29ycA" class="cyc_term">stateOfMatter</a>); they may be salty or not, drinkable or not. Examples include portions of the ocean, such as the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVii7ZwpEbGdrcN5Y29ycA" class="cyc_term">BayOfBiscay</a> and the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjtDJwpEbGdrcN5Y29ycA" class="cyc_term">BayOfBengal</a> (see also <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkFGZwpEbGdrcN5Y29ycA" class="cyc_term">SeaWater</a>); bodies of fresh water, such as <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjySZwpEbGdrcN5Y29ycA" class="cyc_term">NiagaraFalls</a> and the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViO_pwpEbGdrcN5Y29ycA" class="cyc_term">GangesRiver</a>; quantities of chlorinated water (see <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvgD7FZwpEbGdrcN5Y29ycA" class="cyc_term">PoolWater</a>); and the contents of bottles of tonic water (see <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVj0cpwpEbGdrcN5Y29ycA" class="cyc_term">SeltzerWater</a>). Any portion of liquid that consists mostly of water but differs from it in one or more important properties (as does e.g. urine, coffee, and lemonade) is not itself an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjAHZwpEbGdrcN5Y29ycA" class="cyc_term">Water</a>, but has an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjAHZwpEbGdrcN5Y29ycA" class="cyc_term">Water</a> as its main constituent (see <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjTAZwpEbGdrcN5Y29ycA" class="cyc_term">mainConstituent</a>). For the specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjAHZwpEbGdrcN5Y29ycA" class="cyc_term">Water</a> whose instances are pure, see (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwPuxrZwpEbGdrcN5Y29ycA" class="cyc_term">PureFn</a> <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjAHZwpEbGdrcN5Y29ycA" class="cyc_term">Water</a>). water

A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjPmpwpEbGdrcN5Y29ycA" class="cyc_term">SolidTangibleArtifact</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVibNJwpEbGdrcN5Y29ycA" class="cyc_term">Paper</a> is a portion of paper, considered as a 'stuff' out of which things can be made. Specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVibNJwpEbGdrcN5Y29ycA" class="cyc_term">Paper</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVi3nZwpEbGdrcN5Y29ycA" class="cyc_term">Cardboard</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjpnJwpEbGdrcN5Y29ycA" class="cyc_term">SheetOfPaper</a>. Paper paper

mineral Mineral A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvakVVZwpEbGdrcN5Y29ycA" class="cyc_term">InanimateObject_Natural</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwQCJAJwpEbGdrcN5Y29ycA" class="cyc_term">Mineral</a> is a piece of homogeneous inorganic physical substance that has a crystalline structure. Specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwQCJAJwpEbGdrcN5Y29ycA" class="cyc_term">Mineral</a> include the collections <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvgC2UJwpEbGdrcN5Y29ycA" class="cyc_term">Diamond</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvrhEvpwpEbGdrcN5Y29ycA" class="cyc_term">Turquoise_Gem</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rviJhC5wpEbGdrcN5Y29ycA" class="cyc_term">Jade_Gem</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwS62b5wpEbGdrcN5Y29ycA" class="cyc_term">Corundum</a>.

A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjElJwpEbGdrcN5Y29ycA" class="cyc_term">SolidTangibleThing</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjBs5wpEbGdrcN5Y29ycA" class="cyc_term">Leather</a> is a piece of tanned animal hide. Instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjBs5wpEbGdrcN5Y29ycA" class="cyc_term">Leather</a> are commonly used as material inputs to the manufacture of shoes, gloves, upholstery, satchels and purses, saddles, and other items. leather Leather

ground LandStuff A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjVWpwpEbGdrcN5Y29ycA" class="cyc_term">NaturalTangibleStuff</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwPuiRJwpEbGdrcN5Y29ycA" class="cyc_term">LandStuff</a> is a portion of the stuff that the ground of a planet (at or near its land surface) is made of, including rocks, boulders, sand grains, soil, mud, lava, and mixtures of those things (such as islands or whole continents). Examples of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwPuiRJwpEbGdrcN5Y29ycA" class="cyc_term">LandStuff</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv9tl95wpEbGdrcN5Y29ycA" class="cyc_term">ContinentOfAustralia</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwQrf0ZwpEbGdrcN5Y29ycA" class="cyc_term">CapeCod</a>, Zion Hill, and the lava pouring out of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjNqZwpEbGdrcN5Y29ycA" class="cyc_term">MountEtna_Volcano</a>.

SeaWater seawater A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkF2JwpEbGdrcN5Y29ycA" class="cyc_term">Water_Saline</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkFGZwpEbGdrcN5Y29ycA" class="cyc_term">SeaWater</a> is a portion of salt water with the kind of mineral concentrations found in oceans (see the collection <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjktpwpEbGdrcN5Y29ycA" class="cyc_term">Ocean</a>) --including the oceans themselves.

stone StoneStuff A specialization of (<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwPzX0JwpEbGdrcN5Y29ycA" class="cyc_term">SolidFn</a> <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwEzJMJwpEbGdrcN5Y29ycA" class="cyc_term">RockyPlanetaryStuff</a>). Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViOBJwpEbGdrcN5Y29ycA" class="cyc_term">StoneStuff</a> is a piece or portion of rock or stone. Stone is widely used as a material for the construction of buildings, walls, monuments, and sculptures.

plastic Plastic <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVj0lpwpEbGdrcN5Y29ycA" class="cyc_term">Plastic</a> is a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkCIpwpEbGdrcN5Y29ycA" class="cyc_term">ArtificialMaterial</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVj0lpwpEbGdrcN5Y29ycA" class="cyc_term">Plastic</a> is a piece of some type of plastic. This collection includes plastics of all kinds: artificial, mostly polymeric, inedible, organic moldable hydrocarbons. Some common types are <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVi3kpwpEbGdrcN5Y29ycA" class="cyc_term">Rayon</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVi30pwpEbGdrcN5Y29ycA" class="cyc_term">Nylon</a>, polyethylene, etc.

A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwPuiRJwpEbGdrcN5Y29ycA" class="cyc_term">LandStuff</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViHUJwpEbGdrcN5Y29ycA" class="cyc_term">MineralOre</a> is a piece of substance from which some instance(s) of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwQCJAJwpEbGdrcN5Y29ycA" class="cyc_term">Mineral</a> (q.v.) can be extracted. Specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViHUJwpEbGdrcN5Y29ycA" class="cyc_term">MineralOre</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViIX5wpEbGdrcN5Y29ycA" class="cyc_term">IronOre</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViHmJwpEbGdrcN5Y29ycA" class="cyc_term">BauxiteOre</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvWT7-ZwpEbGdrcN5Y29ycA" class="cyc_term">CopperOre</a>. ore MineralOre

salt water Water-Saline A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjAHZwpEbGdrcN5Y29ycA" class="cyc_term">Water</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkF2JwpEbGdrcN5Y29ycA" class="cyc_term">Water_Saline</a> is a portion of water with some substantial concentration of salt mixed into it. An important specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkF2JwpEbGdrcN5Y29ycA" class="cyc_term">Water_Saline</a> is <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkFGZwpEbGdrcN5Y29ycA" class="cyc_term">SeaWater</a> (q.v.).

energy The most generic collection of all instances of all types of energy, either in radiating wave form or in solid matter form, that may be used to provide a source of energy. EnergyStuff

oil Oil An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViGSpwpEbGdrcN5Y29ycA" class="cyc_term">TangibleStuffCompositionType</a>, and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjD0JwpEbGdrcN5Y29ycA" class="cyc_term">OrganicMaterial</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjZ6ZwpEbGdrcN5Y29ycA" class="cyc_term">Oil</a> is a portion of some type of typically viscous, primarily hydrophobic (i.e., _not_ readily soluble in water) liquid hydrocarbon. Notable specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjZ6ZwpEbGdrcN5Y29ycA" class="cyc_term">Oil</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjdrZwpEbGdrcN5Y29ycA" class="cyc_term">CookingOil</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVijH5wpEbGdrcN5Y29ycA" class="cyc_term">HeatingOil</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjb0JwpEbGdrcN5Y29ycA" class="cyc_term">Petroleum_CrudeOil</a>.

A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwIE23ZwpEbGdrcN5Y29ycA" class="cyc_term">TimeDependentCollection</a> (q.v.). This is the collection of all and only those collections <code>COL</code> such that any thing's being an instance of <code>COL</code> depends on the current state of the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjqoZwpEbGdrcN5Y29ycA" class="cyc_term">CycKB</a>. Such a <code>COL</code> corresponds to a property defined (at least partly) in terms of the contents, features, or implementation of the Cyc Knowledge Base itself, as opposed to a property that "exists out there" in the KB-independent world. For example, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvV281JwpEbGdrcN5Y29ycA" class="cyc_term">CycLAssertion</a> is a KB-dependent collection, membership in which requires of a given CycL sentence that it has in fact been asserted to the KB. <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViAoJwpEbGdrcN5Y29ycA" class="cyc_term">CycLSentence</a> is also KB-dependent, as being a CycL sentence requires being composed (ultimately) out of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvu6KTZwpEbGdrcN5Y29ycA" class="cyc_term">CycLReifiedDenotationalTerm</a>s (and perhaps variables) -- i.e. terms that are currently reified in the KB. Conversely, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv5ddsJwpEbGdrcN5Y29ycA" class="cyc_term">Sentence</a> is not a KB-dependent collection. See also <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvip9N5wpEbGdrcN5Y29ycA" class="cyc_term">KBDependentRelation</a>. KB dependent collection KBDependentCollection CommonSubstances-Material-Topic common substances material topic A <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rAmoSCGJbQdiSXZJvYiNhkQ" class="cyc_term">CycVocabularyTopic</a> and a <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rtGXkHpNaEdqAAAACs0uFOQ" class="cyc_term">KBDependentCollection</a>. material-topic Material-Topic CycVocabularyTopic An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvprlOZwpEbGdrcN5Y29ycA" class="cyc_term">FacetingCollectionType</a> and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rgQsP1F2xEdif1wACs2IMlQ" class="cyc_term">Topic</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rAmoSCGJbQdiSXZJvYiNhkQ" class="cyc_term">CycVocabularyTopic</a> is a collection of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA9JwpEbGdrcN5Y29ycA" class="cyc_term">Thing</a>s falling under a topic for which some Cyc Vocabulary exists. <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rgQsP1F2xEdif1wACs2IMlQ" class="cyc_term">Topic</a> is neither a strict [<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvcZ1FpwpEbGdrcN5Y29ycA" class="cyc_term">facets_Strict</a>] nor a covering [<a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv86JWpwpEbGdrcN5Y29ycA" class="cyc_term">facets_Covering</a>] faceting of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA9JwpEbGdrcN5Y29ycA" class="cyc_term">Thing</a>: many <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA9JwpEbGdrcN5Y29ycA" class="cyc_term">Thing</a>s may be instances of no <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rgQsP1F2xEdif1wACs2IMlQ" class="cyc_term">Topic</a>, or of multiple <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rgQsP1F2xEdif1wACs2IMlQ" class="cyc_term">Topic</a>s. cyc vocabulary topic CommonSubstances-Material-Topic common substances material topic