]> 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. The collection of links in hypertext documents that, when the document is rendered by an appropriate program, such as a web browser, allow an end-user to open new files or view other parts of the original document. internet link Hyperlink web link links internet links link web links

Hyperlink

http://en.wikipedia.org/wiki/Hyperlink The collection of links in hypertext documents that, when the document is rendered by an appropriate program, such as a web browser, allow an end-user to open new files or view other parts of the original document. internet link Hyperlink The collection of links in hypertext documents that, when the document is rendered by an appropriate program, such as a web browser, allow an end-user to open new files or view other parts of the original document. internet link Hyperlink DocumentStructureRepresentationConstant document structure representation constant The collection of instances of <a href="http://sw.opencyc.org/concept/Mx4rvzSRxJwpEbGdrcN5Y29ycA" class="cyc_term">CycLConstant</a> used to represent the structure of documents. 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 The collection of links in hypertext documents that, when the document is rendered by an appropriate program, such as a web browser, allow an end-user to open new files or view other parts of the original document. internet link Hyperlink Hyperlink To hyperlinkTo <code>(<a href="http://sw.opencyc.org/concept/Mx4r5XxgOPU5EdmAAAACs71DGQ" class="cyc_term">hyperlinkTo</a> LINK AIS)</code> means that the instance <code>LINK</code> of <a href="http://sw.opencyc.org/concept/Mx4rveLUo5wpEbGdrcN5Y29ycA" class="cyc_term">Hyperlink</a> is a link to the instance <code>AIS</code> of <a href="http://sw.opencyc.org/concept/Mx4rwQGTzJwpEbGdrcN5Y29ycA" class="cyc_term">AbstractInformationStructure</a>. Note that though it is an instance of <a href="http://sw.opencyc.org/concept/Mx4rvViBpJwpEbGdrcN5Y29ycA" class="cyc_term">FunctionalSlot</a>, <a href="http://sw.opencyc.org/concept/Mx4r5XxgOPU5EdmAAAACs71DGQ" class="cyc_term">hyperlinkTo</a> is not strictly functional (c.f., <a href="http://sw.opencyc.org/concept/Mx4rYJo7_sRMEdaAAACQJ5qciw" class="cyc_term">StrictlyFunctionalSlot</a>); two distinct arg2 values <code>AIS-1</code> and <code>AIS-2</code> can hold for a given arg1 value just in case one of those values is a sub-structure of the other: <code>(<a href="http://sw.opencyc.org/concept/Mx4rvViA-pwpEbGdrcN5Y29ycA" class="cyc_term">or</a> (<a href="http://sw.opencyc.org/concept/Mx4rvXGhnpwpEbGdrcN5Y29ycA" class="cyc_term">subInfoStructures</a> AIS-1 AIS-2) (<a href="http://sw.opencyc.org/concept/Mx4rvXGhnpwpEbGdrcN5Y29ycA" class="cyc_term">subInfoStructures</a> AIS-2 AIS-1))</code>. An instance of <a href="http://sw.opencyc.org/concept/Mx4rvViAzJwpEbGdrcN5Y29ycA" class="cyc_term">Collection</a>, and a specialization of <a href="http://sw.opencyc.org/concept/Mx4rwRCCC5wpEbGdrcN5Y29ycA" class="cyc_term">Path_Generic</a>. Each instance of <a href="http://sw.opencyc.org/concept/Mx4rvViOaZwpEbGdrcN5Y29ycA" class="cyc_term">Path_Simple</a> is a path with two distinct ends that do not "overlap" each other (in the case of spatial paths, the two ends are spatially disjoint). Since no instance of <a href="http://sw.opencyc.org/concept/Mx4rvViOaZwpEbGdrcN5Y29ycA" class="cyc_term">Path_Simple</a> has ends that join at one point, <a href="http://sw.opencyc.org/concept/Mx4rvViOaZwpEbGdrcN5Y29ycA" class="cyc_term">Path_Simple</a> is disjoint with <a href="http://sw.opencyc.org/concept/Mx4rv6MSn5wpEbGdrcN5Y29ycA" class="cyc_term">Path_Cyclic</a>. Although instances of <a href="http://sw.opencyc.org/concept/Mx4rvViOaZwpEbGdrcN5Y29ycA" class="cyc_term">Path_Simple</a> have distinct ends, some instances may have more than two things that are its "end-points". For example, a path between Austin and Pittsburgh can also be a path between Texas and Pennsylvania. Notable specializations of <a href="http://sw.opencyc.org/concept/Mx4rvViOaZwpEbGdrcN5Y29ycA" class="cyc_term">Path_Simple</a> include <a href="http://sw.opencyc.org/concept/Mx4rvViZ_ZwpEbGdrcN5Y29ycA" class="cyc_term">Pipe_GenericConduit</a>, <a href="http://sw.opencyc.org/concept/Mx4rwP3lkpwpEbGdrcN5Y29ycA" class="cyc_term">Nerve</a>, and <a href="http://sw.opencyc.org/concept/Mx4rvVkHdJwpEbGdrcN5Y29ycA" class="cyc_term">Stream</a>. Path-Simple path that is not a loop Required Arg 1 Pred requiredArg1Pred A <a href="http://sw.opencyc.org/concept/Mx4rwNZi3JwpEbGdrcN5Y29ycA" class="cyc_term">MetaPredicate</a> for stating that every instance of a given collection is related to some thing or things by a given predicate. <code>(<a href="http://sw.opencyc.org/concept/Mx4rvdUGBpwpEbGdrcN5Y29ycA" class="cyc_term">requiredArg1Pred</a> COL PRED)</code> means that for every instance <code>INST</code> of <code>COL</code>, there exists some sequence <code>ARGS</code> such that <code>(PRED INST . ARGS)</code> holds. For example, (<a href="http://sw.opencyc.org/concept/Mx4rvdUGBpwpEbGdrcN5Y29ycA" class="cyc_term">requiredArg1Pred</a> <a href="http://sw.opencyc.org/concept/Mx4rvVjVT5wpEbGdrcN5Y29ycA" class="cyc_term">Organization</a> <a href="http://sw.opencyc.org/concept/Mx4rvViz-5wpEbGdrcN5Y29ycA" class="cyc_term">hasMembers</a>) means that every organization has at least one member. See also <a href="http://sw.opencyc.org/concept/Mx4rvvftiJwpEbGdrcN5Y29ycA" class="cyc_term">requiredArg2Pred</a> and <a href="http://sw.opencyc.org/concept/Mx4rtSyCMo5bQdiKvbFrqtRipw" class="cyc_term">requiredArg3Pred</a>. <code>(<a href="http://sw.opencyc.org/concept/Mx4rYdkoLvU5EdmAAAACs71DGQ" class="cyc_term">structureContainsLinks</a> STRUCTURE LINK)</code> means that the instance <code>STRUCTURE</code> of <a href="http://sw.opencyc.org/concept/Mx4rvntUR5wpEbGdrcN5Y29ycA" class="cyc_term">AbstractStructure</a> (typically a hypertext document or a part thereof) contains an instance <code>LINK</code> of <a href="http://sw.opencyc.org/concept/Mx4rveLUo5wpEbGdrcN5Y29ycA" class="cyc_term">Hyperlink</a>. structureContainsLinks Structure Contains Links SystemOfDevices This collection involves instances which are <a href="http://sw.opencyc.org/concept/Mx4rvVjmoJwpEbGdrcN5Y29ycA" class="cyc_term">Group</a>s of <a href="http://sw.opencyc.org/concept/Mx4rvVjHL5wpEbGdrcN5Y29ycA" class="cyc_term">PhysicalDevice</a>s which interact and are connected in some sort of network. Positive examples include a computer system, a telephone system, a plumbing system. Negative examples include instances of simple tools, such as a screwdriver or a hammer, which have discrete connected parts, but whose parts do not interact in any complicated way. Another negative example is a single instance of <a href="http://sw.opencyc.org/concept/Mx4rvVjTBZwpEbGdrcN5Y29ycA" class="cyc_term">Telephone</a>. In a context of naive familiarity with the device, the telephone is not a system because its parts do not form an obvious network. system of devices Hyperlink Href Value hyperlinkHrefValue <code>(<a href="http://sw.opencyc.org/concept/Mx4rop6MBPVOEdmAAAACs71DGQ" class="cyc_term">hyperlinkHrefValue</a> LINK URI)</code> means that the instance <code>LINK</code> of <a href="http://sw.opencyc.org/concept/Mx4rveLUo5wpEbGdrcN5Y29ycA" class="cyc_term">Hyperlink</a> is a link to the document identified by the instance <code>URI</code> of <a href="http://sw.opencyc.org/concept/Mx4riWEqWBRyQdiVxMme-dz2_w" class="cyc_term">UniformResourceIdentifier</a>. Pretty String (<a href="http://sw.opencyc.org/concept/Mx4rwLSVCpwpEbGdrcN5Y29ycA" class="cyc_term">prettyString</a> TERM STRING) means that STRING is the English word or expression (sequence of words) commonly used to refer to TERM. The predicate <a href="http://sw.opencyc.org/concept/Mx4rwLSVCpwpEbGdrcN5Y29ycA" class="cyc_term">prettyString</a> is used by the code which generates CycL to English paraphrases, but its applicability is not restricted to this use. prettyString spanningLink Spanning Link <code>(<a href="http://sw.opencyc.org/concept/Mx4rEE1FCvVLEdmAAAACs71DGQ" class="cyc_term">spanningLink</a> AIS LINK)</code> means that the entire span of the instance <code>AIS</code> of <a href="http://sw.opencyc.org/concept/Mx4rvntUR5wpEbGdrcN5Y29ycA" class="cyc_term">AbstractStructure</a> (typically an instance of <a href="http://sw.opencyc.org/concept/Mx4rwQGTzJwpEbGdrcN5Y29ycA" class="cyc_term">AbstractInformationStructure</a> or <a href="http://sw.opencyc.org/concept/Mx4r076hGgRjEdqAAAACs71DGQ" class="cyc_term">ContextualizedInformationStructure</a> that is part of an HTML document) is linked to some other resource via the instance <code>LINK</code> of <a href="http://sw.opencyc.org/concept/Mx4rveLUo5wpEbGdrcN5Y29ycA" class="cyc_term">Hyperlink</a>. In a typical browsing environment, clicking on any part of AIS will result in <code>LINK</code> being followed. A collection of collections. Each instance of <a href="http://sw.opencyc.org/concept/Mx4rvWXYgJwpEbGdrcN5Y29ycA" class="cyc_term">ExistingObjectType</a> is a specialization of <a href="http://sw.opencyc.org/concept/Mx4rvVj27ZwpEbGdrcN5Y29ycA" class="cyc_term">PartiallyTangible</a> (q.v.). Moreover, each instance of <a href="http://sw.opencyc.org/concept/Mx4rvWXYgJwpEbGdrcN5Y29ycA" class="cyc_term">ExistingObjectType</a> is a collection that is temporally stuff-like (see <a href="http://sw.opencyc.org/concept/Mx4rvVitN5wpEbGdrcN5Y29ycA" class="cyc_term">TemporalStuffType</a>) but physically-spatially object-like (see <a href="http://sw.opencyc.org/concept/Mx4rvVirnZwpEbGdrcN5Y29ycA" class="cyc_term">ObjectType</a>) -- i.e. object-like with respect to some physical-spatial part-whole predicate (e.g. some specialization of <a href="http://sw.opencyc.org/concept/Mx4r8a2smPXcQdiEoJhcx65EiQ" class="cyc_term">properPhysicalDecompositions</a>). Consider the collection <a href="http://sw.opencyc.org/concept/Mx4rwJaXepwpEbGdrcN5Y29ycA" class="cyc_term">BookCopy</a>. <a href="http://sw.opencyc.org/concept/Mx4rwJaXepwpEbGdrcN5Y29ycA" class="cyc_term">BookCopy</a> is a specialization of <a href="http://sw.opencyc.org/concept/Mx4rvVj27ZwpEbGdrcN5Y29ycA" class="cyc_term">PartiallyTangible</a>. Further, <a href="http://sw.opencyc.org/concept/Mx4rwJaXepwpEbGdrcN5Y29ycA" class="cyc_term">BookCopy</a> is temporally stuff-like: any one of the <a href="http://sw.opencyc.org/concept/Mx4rvWn4OZwpEbGdrcN5Y29ycA" class="cyc_term">timeSlices</a> of a given copy <code>COPY</code> of (say) "Moby Dick" is still a copy of "Moby Dick". (Most collections of tangible objects are temporally stuff-like in this way.) But <a href="http://sw.opencyc.org/concept/Mx4rwJaXepwpEbGdrcN5Y29ycA" class="cyc_term">BookCopy</a> is spatially object-like: if we take a scalpel and slice <code>COPY</code> into ten pieces, each piece is not a copy of "Moby Dick". So <a href="http://sw.opencyc.org/concept/Mx4rwJaXepwpEbGdrcN5Y29ycA" class="cyc_term">BookCopy</a> is an instance of <a href="http://sw.opencyc.org/concept/Mx4rvWXYgJwpEbGdrcN5Y29ycA" class="cyc_term">ExistingObjectType</a>. See also <a href="http://sw.opencyc.org/concept/Mx4rvVir35wpEbGdrcN5Y29ycA" class="cyc_term">StuffType</a> and <a href="http://sw.opencyc.org/concept/Mx4rvVny6pwpEbGdrcN5Y29ycA" class="cyc_term">ExistingStuffType</a>. ExistingObjectType type of object composite tangible and intangible thing CompositeTangibleAndIntangibleObject The collection of individuals that have both a tangible and an intangible component. Instances include people (who have bodies and minds), information bearing objects (which consist of intangible information encoded in a tangible object, such as the music on a CD or the text in a book), and many other things. Each instance of <a href="http://sw.opencyc.org/concept/Mx4rvVj3cZwpEbGdrcN5Y29ycA" class="cyc_term">CompositeTangibleAndIntangibleObject</a>, being partially tangible, exists in time (see <a href="http://sw.opencyc.org/concept/Mx4rvViAxJwpEbGdrcN5Y29ycA" class="cyc_term">TemporalThing</a>). Although occasionally it can be useful to reify separately the tangible and intangible components of a composite object (e.g. to state certain things about Lenin's body as opposed to his mind), in most cases it is sufficient simply to reify the composite. information-bearing thing InformationBearingThing A collection of spatially-localized individuals, including various actions and events as well as physical objects. Each instance of <a href="http://sw.opencyc.org/concept/Mx4rvkNufpwpEbGdrcN5Y29ycA" class="cyc_term">InformationBearingThing</a> (or "IBT") is an item that contains information (for an agent who knows how to interpret it). Examples: a copy of the novel Moby Dick; a signal buoy; a photograph; an elevator sign in Braille; a map; a US dollar bill; a resume; a musical score; copies of the <a href="http://sw.opencyc.org/concept/Mx4rvVjbE5wpEbGdrcN5Y29ycA" class="cyc_term">CycProgram</a>. For representations of the propositional content of information bearing things, see <a href="http://sw.opencyc.org/concept/Mx4rvViAqJwpEbGdrcN5Y29ycA" class="cyc_term">PropositionalInformationThing</a>; but note that not all IBTs have a propositional content (cf. <a href="http://sw.opencyc.org/concept/Mx4rvVjHuJwpEbGdrcN5Y29ycA" class="cyc_term">ArtObject</a>). An important specialization of <a href="http://sw.opencyc.org/concept/Mx4rvkNufpwpEbGdrcN5Y29ycA" class="cyc_term">InformationBearingThing</a> is <a href="http://sw.opencyc.org/concept/Mx4rvVj2rJwpEbGdrcN5Y29ycA" class="cyc_term">InformationBearingObject</a>, which comprises all of those IBTs that are also physical objects (i.e. <a href="http://sw.opencyc.org/concept/Mx4rvVj27ZwpEbGdrcN5Y29ycA" class="cyc_term">PartiallyTangible</a>s). Though often a subtle task in particular contexts, it is important to distinguish the various specializations of <a href="http://sw.opencyc.org/concept/Mx4rvkNufpwpEbGdrcN5Y29ycA" class="cyc_term">InformationBearingThing</a> from those of <a href="http://sw.opencyc.org/concept/Mx4rvf9sZJwpEbGdrcN5Y29ycA" class="cyc_term">AspatialInformationStore</a> (whose instances are the chunks of information instantiated in particular IBTs; see <a href="http://sw.opencyc.org/concept/Mx4rv8RaTpwpEbGdrcN5Y29ycA" class="cyc_term">instantiationOfAIT</a>) and from those of <a href="http://sw.opencyc.org/concept/Mx4rwClAZJwpEbGdrcN5Y29ycA" class="cyc_term">ConceptualWork</a> (whose instances are the conceptual or artistic creations that are instantiated in particular IBTs; see <a href="http://sw.opencyc.org/concept/Mx4rvYyDjpwpEbGdrcN5Y29ycA" class="cyc_term">instantiationOfWork</a>). For instance, <a href="http://sw.opencyc.org/concept/Mx4rv65Pt5wpEbGdrcN5Y29ycA" class="cyc_term">TextString</a> is a specialization of <a href="http://sw.opencyc.org/concept/Mx4rvf9sZJwpEbGdrcN5Y29ycA" class="cyc_term">AspatialInformationStore</a>, <a href="http://sw.opencyc.org/concept/Mx4rvVkEx5wpEbGdrcN5Y29ycA" class="cyc_term">TextualMaterial</a> is a specialization of <a href="http://sw.opencyc.org/concept/Mx4rvkNufpwpEbGdrcN5Y29ycA" class="cyc_term">InformationBearingThing</a>, and <a href="http://sw.opencyc.org/concept/Mx4rwSZiGZwpEbGdrcN5Y29ycA" class="cyc_term">TextualPCW</a> is a specialization of <a href="http://sw.opencyc.org/concept/Mx4rwClAZJwpEbGdrcN5Y29ycA" class="cyc_term">ConceptualWork</a>; to conflate any of these with another would be to make a "category error". Also note that events in which information is transferred (see <a href="http://sw.opencyc.org/concept/Mx4rvVifB5wpEbGdrcN5Y29ycA" class="cyc_term">InformationTransferEvent</a>) are not considered instances of <a href="http://sw.opencyc.org/concept/Mx4rvkNufpwpEbGdrcN5Y29ycA" class="cyc_term">InformationBearingThing</a>. Rather, such transfer events have as one of their participants (see <a href="http://sw.opencyc.org/concept/Mx4rvVjFpZwpEbGdrcN5Y29ycA" class="cyc_term">actors</a>) some instance of <a href="http://sw.opencyc.org/concept/Mx4rvkNufpwpEbGdrcN5Y29ycA" class="cyc_term">InformationBearingThing</a>; though in cases where IBTs are themselves events this will require distinguishing very finely between the event that encodes the information and the event that is the information transfer. See also the sense-modality-based specializations, <a href="http://sw.opencyc.org/concept/Mx4rvVjIvpwpEbGdrcN5Y29ycA" class="cyc_term">SoundInformationBearingThing</a> and <a href="http://sw.opencyc.org/concept/Mx4rvVjPtpwpEbGdrcN5Y29ycA" class="cyc_term">VisualInformationBearingThing</a>. quotedIsa A binary <a href="http://sw.opencyc.org/concept/Mx4rDeDIGEW0EdaAAACgydogAg" class="cyc_term">MetaLanguagePredicate</a> (q.v.) that relates CycL expressions to the <a href="http://sw.opencyc.org/concept/Mx4raOoTci9qEdma4AACs1uxFw" class="cyc_term">SubLExpressionType</a>s (q.v.) of which they are instances. <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> is thus like a restricted version of <a href="http://sw.opencyc.org/concept/Mx4rvViBBJwpEbGdrcN5Y29ycA" class="cyc_term">isa</a> (q.v.), but with one important difference: the first argument-place of <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> is "implicitly quoted" (see <a href="http://sw.opencyc.org/concept/Mx4rwHb_bZwpEbGdrcN5Y29ycA" class="cyc_term">quotedArgument</a>). So a ground atomic sentence of the form <code>(<a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> THING EXPR-TYPE)</code> does not mean that <code>THING</code> itself is an instance of <code>EXPR-TYPE</code>. Rather, such a sentence is partly self-referential, and means that the particular CycL expression appearing in the sentence's own first argument-position is an instance of <code>EXPR-TYPE</code>. Thus, <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> provides a convenient shorthand for stating certain things that would otherwise require explicit quotation (or some other device for naming expressions). This is better illustrated with a specific example. Suppose we wish to state that the CycL constant <code><a href="http://sw.opencyc.org/concept/Mx4rvViH35wpEbGdrcN5Y29ycA" class="cyc_term">IndianOcean</a></code> is an instance of the CycL expression type #$PublicConstant. We cannot express this with the straightforward <a href="http://sw.opencyc.org/concept/Mx4rvViBBJwpEbGdrcN5Y29ycA" class="cyc_term">isa</a> sentence <code>(<a href="http://sw.opencyc.org/concept/Mx4rvViBBJwpEbGdrcN5Y29ycA" class="cyc_term">isa</a> <a href="http://sw.opencyc.org/concept/Mx4rvViH35wpEbGdrcN5Y29ycA" class="cyc_term">IndianOcean</a> #$PublicConstant)</code>, as that states the falsehood that the IndianOcean itself -- which is not a constant but a body of water -- is a public constant. But we can express precisely what we want like this: <pre> (<a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> <a href="http://sw.opencyc.org/concept/Mx4rvViH35wpEbGdrcN5Y29ycA" class="cyc_term">IndianOcean</a> #$PublicConstant) . </pre> Now <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> is a <a href="http://sw.opencyc.org/concept/Mx4rv4oJWZwpEbGdrcN5Y29ycA" class="cyc_term">MacroRelation</a> (q.v.), and by its <a href="http://sw.opencyc.org/concept/Mx4rvVjg7JwpEbGdrcN5Y29ycA" class="cyc_term">expansion</a> any given <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> sentence is equivalent to some <a href="http://sw.opencyc.org/concept/Mx4rvViBBJwpEbGdrcN5Y29ycA" class="cyc_term">isa</a> sentence with an explicitly quoted first argument. The sentence displayed above turns out to be equivalent to: <pre> (<a href="http://sw.opencyc.org/concept/Mx4rvViBBJwpEbGdrcN5Y29ycA" class="cyc_term">isa</a> (<a href="http://sw.opencyc.org/concept/Mx4rgGBbEkNuEdaAAACgydogAg" class="cyc_term">Quote</a> <a href="http://sw.opencyc.org/concept/Mx4rvViH35wpEbGdrcN5Y29ycA" class="cyc_term">IndianOcean</a>) #$PublicConstant). </pre> But the <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> version has two related practical advantages over the <a href="http://sw.opencyc.org/concept/Mx4rvViBBJwpEbGdrcN5Y29ycA" class="cyc_term">isa</a> version. First, the former is syntactically simpler than the latter. Second, the simpler syntax of the former makes it easier to browse in the Knowedge Base: while the <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> version is conveniently indexed under the KB Browser page for the constant <code><a href="http://sw.opencyc.org/concept/Mx4rvViH35wpEbGdrcN5Y29ycA" class="cyc_term">IndianOcean</a></code>, the <a href="http://sw.opencyc.org/concept/Mx4rvViBBJwpEbGdrcN5Y29ycA" class="cyc_term">isa</a> version would apparently be indexed under a separate, brand new page for the term <code>(<a href="http://sw.opencyc.org/concept/Mx4rgGBbEkNuEdaAAACgydogAg" class="cyc_term">Quote</a> <a href="http://sw.opencyc.org/concept/Mx4rvViH35wpEbGdrcN5Y29ycA" class="cyc_term">IndianOcean</a>)</code>. Generalizing the point, <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a> lets us avoid having potentially to double the number of pages currently in the browser. For the semantically more complicated (but rarely encountered) case in which <a href="http://sw.opencyc.org/concept/Mx4rBVVEokNxEdaAAACgydogAg" class="cyc_term">quotedIsa</a>'s first argument-place is filled with an open expression, see the accompanying #$cyclistNotes. Quoted Isa 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