]> 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. organism by taxonomic kingdom biology topic OrganismByTaxonomicKingdom-Biology-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>. SingleCellOrganism single-cell organism A specialization of both <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwAst7pwpEbGdrcN5Y29ycA" class="cyc_term">Microorganism</a> and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjuY5wpEbGdrcN5Y29ycA" class="cyc_term">Cell</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkG5pwpEbGdrcN5Y29ycA" class="cyc_term">SingleCellOrganism</a> is an organism composed of a single self-reproducing living cell. Notable specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkG5pwpEbGdrcN5Y29ycA" class="cyc_term">SingleCellOrganism</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVil55wpEbGdrcN5Y29ycA" class="cyc_term">Protozoan</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjVN5wpEbGdrcN5Y29ycA" class="cyc_term">ProkaryoticCell</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViloJwpEbGdrcN5Y29ycA" class="cyc_term">Algae_LikeProtist</a>. Plant plant The collection of all individual plants, an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjf5JwpEbGdrcN5Y29ycA" class="cyc_term">OrganismClassificationType</a> and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv8gyOpwpEbGdrcN5Y29ycA" class="cyc_term">EukaryoticOrganism</a>. <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjG4ZwpEbGdrcN5Y29ycA" class="cyc_term">Plant</a> is a member of the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViYmpwpEbGdrcN5Y29ycA" class="cyc_term">BiologicalKingdom</a> and contains the primary subjects of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVir9pwpEbGdrcN5Y29ycA" class="cyc_term">Botany</a>. The instances of this collections are typically stationary, living, whole organisms; the cells of plants generally lack cholesterol and have cell walls that include substances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvWB3VpwpEbGdrcN5Y29ycA" class="cyc_term">Cellulose</a>. Most, though not all, plants are capable of making sugars by <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkC15wpEbGdrcN5Y29ycA" class="cyc_term">Photosynthesis_Plant</a> processes and have green parts. Some example subsets of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjG4ZwpEbGdrcN5Y29ycA" class="cyc_term">Plant</a> are the collections <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVia8JwpEbGdrcN5Y29ycA" class="cyc_term">RoseBush</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvgEb-pwpEbGdrcN5Y29ycA" class="cyc_term">SpruceTree</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVijT5wpEbGdrcN5Y29ycA" class="cyc_term">Moss</a>. A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwAst7pwpEbGdrcN5Y29ycA" class="cyc_term">Microorganism</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViXQpwpEbGdrcN5Y29ycA" class="cyc_term">Virus</a> consists mainly of a capsid (capsule chamber) containing viral DNA or RNA. Viruses have no cells, but reproduce by inserting into living cells the viral DNA or RNA, which then uses cellular mechanisms to create new viruses. Viruses cause many diseases in all other types of organisms; some can even infect instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjU-5wpEbGdrcN5Y29ycA" class="cyc_term">Bacterium</a>. Note that <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViXQpwpEbGdrcN5Y29ycA" class="cyc_term">Virus</a> excludes prions, bacteria, rickettsia, and protists. Virus virus blue-green algae BlueGreenAlgae The collection of (mostly dark blue-green in bulk) aquatic organisms called Blue-green Algae or sometimes Cyanobacteria. The elements of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViFLpwpEbGdrcN5Y29ycA" class="cyc_term">BlueGreenAlgae</a> are also elements of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjtFZwpEbGdrcN5Y29ycA" class="cyc_term">Autotroph</a> and of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjVN5wpEbGdrcN5Y29ycA" class="cyc_term">ProkaryoticCell</a>, and they carry out processes of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvofLqJwpEbGdrcN5Y29ycA" class="cyc_term">Photosynthesis_Bacterial</a>. The class of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViFLpwpEbGdrcN5Y29ycA" class="cyc_term">BlueGreenAlgae</a>, also called Cyanophyta, is one of the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViXj5wpEbGdrcN5Y29ycA" class="cyc_term">BiologicalDivision</a>s of the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjLS5wpEbGdrcN5Y29ycA" class="cyc_term">MoneraKingdom</a>. (Compare with <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjU-5wpEbGdrcN5Y29ycA" class="cyc_term">Bacterium</a>.) A specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkG5pwpEbGdrcN5Y29ycA" class="cyc_term">SingleCellOrganism</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjVN5wpEbGdrcN5Y29ycA" class="cyc_term">ProkaryoticCell</a> is a single-celled organism that lacks both a nucleus and mitochondria. Notable specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjVN5wpEbGdrcN5Y29ycA" class="cyc_term">ProkaryoticCell</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjU-5wpEbGdrcN5Y29ycA" class="cyc_term">Bacterium</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjLS5wpEbGdrcN5Y29ycA" class="cyc_term">MoneraKingdom</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViFLpwpEbGdrcN5Y29ycA" class="cyc_term">BlueGreenAlgae</a>. ProkaryoticCell prokaryotic organism Algae-LikeProtist algae-like protist The collection of protists (organisms classed in the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimKZwpEbGdrcN5Y29ycA" class="cyc_term">ProtistaKingdom</a>) that are said to be algae-like, such as golden algae or diatoms. slime mold SlimeMold The collection of slime molds, peculiar creatures that exist in multiple phases, sometimes as scattered cells, sometimes as macroscopic colony-creatures able to move slowly, with vaguely fungal mechanisms. The class of slime molds is treated in many classification systems as an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViXj5wpEbGdrcN5Y29ycA" class="cyc_term">BiologicalDivision</a>, called Myxomycota, under the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimKZwpEbGdrcN5Y29ycA" class="cyc_term">ProtistaKingdom</a>. See also <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViknJwpEbGdrcN5Y29ycA" class="cyc_term">TrueSlimeMold</a> and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVj3ipwpEbGdrcN5Y29ycA" class="cyc_term">CellularSlimeMold</a>. protozoan Protozoan The collection of protozoa; a subcollection of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkG5pwpEbGdrcN5Y29ycA" class="cyc_term">SingleCellOrganism</a>. Instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVil55wpEbGdrcN5Y29ycA" class="cyc_term">Protozoan</a> are also instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVju55wpEbGdrcN5Y29ycA" class="cyc_term">EukaryoticCell</a>. Subcollections include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViVw5wpEbGdrcN5Y29ycA" class="cyc_term">Amoeba</a> and many others. Protozoa lack cell walls made of cellulose. Many protozoa are motile, using pseudopoda, cilia, or flagella to move. Some cause diseases in larger organisms. The class <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVil55wpEbGdrcN5Y29ycA" class="cyc_term">Protozoan</a> is an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViYV5wpEbGdrcN5Y29ycA" class="cyc_term">BiologicalSubkingdom</a> in many classification systems, sometimes placed under the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimKZwpEbGdrcN5Y29ycA" class="cyc_term">ProtistaKingdom</a>. Protista ProtistaKingdom An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViYmpwpEbGdrcN5Y29ycA" class="cyc_term">BiologicalKingdom</a> and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv8gyOpwpEbGdrcN5Y29ycA" class="cyc_term">EukaryoticOrganism</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimKZwpEbGdrcN5Y29ycA" class="cyc_term">ProtistaKingdom</a> is a eukaryotic organism that is _not_ a plant, animal, or fungus. All unicellular eukaryotic organisms are instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimKZwpEbGdrcN5Y29ycA" class="cyc_term">ProtistaKingdom</a>, although not all instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimKZwpEbGdrcN5Y29ycA" class="cyc_term">ProtistaKingdom</a> are unicellular organisms. Notable specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimKZwpEbGdrcN5Y29ycA" class="cyc_term">ProtistaKingdom</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVil55wpEbGdrcN5Y29ycA" class="cyc_term">Protozoan</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVj3xJwpEbGdrcN5Y29ycA" class="cyc_term">SlimeMold</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViloJwpEbGdrcN5Y29ycA" class="cyc_term">Algae_LikeProtist</a>. bacterium Bacterium The collection of bacteria; a subset of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkG5pwpEbGdrcN5Y29ycA" class="cyc_term">SingleCellOrganism</a>. Each element of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjU-5wpEbGdrcN5Y29ycA" class="cyc_term">Bacterium</a> is also an element of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjVN5wpEbGdrcN5Y29ycA" class="cyc_term">ProkaryoticCell</a> and of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkDMZwpEbGdrcN5Y29ycA" class="cyc_term">Heterotroph</a>. Bacteria are typically incapable of processes of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvofLqJwpEbGdrcN5Y29ycA" class="cyc_term">Photosynthesis_Bacterial</a>. The class <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjU-5wpEbGdrcN5Y29ycA" class="cyc_term">Bacterium</a>, also called the Schizomycophyta, is one of the divisions of the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjLS5wpEbGdrcN5Y29ycA" class="cyc_term">MoneraKingdom</a>. Many bacteria cause diseases that are instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwQww85wpEbGdrcN5Y29ycA" class="cyc_term">BacterialInfection</a> in both plants and animals, but some are beneficial or even necessary for life. Compare with the <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViFLpwpEbGdrcN5Y29ycA" class="cyc_term">BlueGreenAlgae</a>. fungus Fungus A specialization of both <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv8gyOpwpEbGdrcN5Y29ycA" class="cyc_term">EukaryoticOrganism</a> and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkDMZwpEbGdrcN5Y29ycA" class="cyc_term">Heterotroph</a>, and an instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViYmpwpEbGdrcN5Y29ycA" class="cyc_term">BiologicalKingdom</a>. Instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViZCZwpEbGdrcN5Y29ycA" class="cyc_term">Fungus</a> are eukaryotic, heterotrophic organisms that are typically not capable of movement. The cell walls of instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViZCZwpEbGdrcN5Y29ycA" class="cyc_term">Fungus</a> are structurally similar to the cell walls of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjG4ZwpEbGdrcN5Y29ycA" class="cyc_term">Plant</a>s, but the former are composed mostly of chitin, while the latter are composed mostly of cellulose (see the collections <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvydmN5wpEbGdrcN5Y29ycA" class="cyc_term">Chitin</a> and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvWB3VpwpEbGdrcN5Y29ycA" class="cyc_term">Cellulose</a>). Instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViZCZwpEbGdrcN5Y29ycA" class="cyc_term">Fungus</a> reproduce by means of spores, which are usually disseminated by the wind. Some types of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViZCZwpEbGdrcN5Y29ycA" class="cyc_term">Fungus</a> are parasites (see the collection <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvdW_tpwpEbGdrcN5Y29ycA" class="cyc_term">ParasiticOrganism</a>), some are saprophytic (see the collection <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVimJpwpEbGdrcN5Y29ycA" class="cyc_term">Saprophyte</a>), and some have symbiotic relationships with other organisms. Notable specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViZCZwpEbGdrcN5Y29ycA" class="cyc_term">Fungus</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVij7pwpEbGdrcN5Y29ycA" class="cyc_term">Mushroom</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjL1ZwpEbGdrcN5Y29ycA" class="cyc_term">Yeast</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViW_pwpEbGdrcN5Y29ycA" class="cyc_term">RingwormFungus</a>. An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViYmpwpEbGdrcN5Y29ycA" class="cyc_term">BiologicalKingdom</a>, and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjVN5wpEbGdrcN5Y29ycA" class="cyc_term">ProkaryoticCell</a>. Each instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjLS5wpEbGdrcN5Y29ycA" class="cyc_term">MoneraKingdom</a> is a one-celled prokaryotic organism (so each instance lacks a nuclear membrane, as well as other internal organelles). Specializations of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjLS5wpEbGdrcN5Y29ycA" class="cyc_term">MoneraKingdom</a> include <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjU-5wpEbGdrcN5Y29ycA" class="cyc_term">Bacterium</a>, <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rwJzoVJwpEbGdrcN5Y29ycA" class="cyc_term">PseudomonasMallei</a>, and <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rv-S2cpwpEbGdrcN5Y29ycA" class="cyc_term">EscherichiaColi</a>. MoneraKingdom Monera animal An instance of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViYmpwpEbGdrcN5Y29ycA" class="cyc_term">BiologicalKingdom</a>, and a specialization of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVjE1pwpEbGdrcN5Y29ycA" class="cyc_term">Organism_Whole</a>. Instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViwMZwpEbGdrcN5Y29ycA" class="cyc_term">Animal</a> are typically motile, living, whole organisms; they are instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvVkDMZwpEbGdrcN5Y29ycA" class="cyc_term">Heterotroph</a> (q.v.), and thus incapable of performing instances of <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvp37_ZwpEbGdrcN5Y29ycA" class="cyc_term">Photosynthesis_Generic</a>. Animal cells contain cholesterol and lack cell walls made of cellulose. Animal organism by taxonomic kingdom biology topic OrganismByTaxonomicKingdom-Biology-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>. 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><b>COL</b></code> such that any thing's being an instance of <code><b>COL</b></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><b>COL</b></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 &quot;exists out there&quot; in the KB-independent world. <p/> 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 <i>not</i> a KB-dependent collection. <p/> See also <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvip9N5wpEbGdrcN5Y29ycA" class="cyc_term">KBDependentRelation</a>. KB dependent collection KBDependentCollection organism by taxonomic kingdom biology topic OrganismByTaxonomicKingdom-Biology-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>. 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 biology-topic An instance 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/Mx4rgQs2412xEdif1wACs2IMlQ" class="cyc_term">Biology_Topic</a> is a <a href="http://sw.opencyc.org/2008/06/10/concept/Mx4rvViA9JwpEbGdrcN5Y29ycA" class="cyc_term">Thing</a> which (in some significant sense) has to do with the topic of biology. Biology-Topic organism by taxonomic kingdom biology topic OrganismByTaxonomicKingdom-Biology-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>.