The MediaWiki software maintains tables of categories, to which any editable page can be added. To add a page to a category, include " [[Category:Category name]] ...
Help:Category
FromWikipedia,thefreeencyclopedia
Jumptonavigation
Jumptosearch
ForguidelinesontheuseofcategoriesonWikipedia,seeWikipedia:Categorization.Forabasicreaders'guide,seeHelp:Categories.Forquickanswers,seethereaders'FAQortheeditors'FAQoncategories.Foralistofcategories,seeSpecial:Categories.
Thispagedescribeseditingwiththesourceeditor.SeeHelp:VisualEditor§ EditingcategoriesforVisualEditor.
WikipediainformationpageThisisaninformationpage.ItisnotoneofWikipedia'spoliciesorguidelines,butratherintendstodescribesomeaspect(s)ofWikipedia'snorms,customs,technicalities,orpractices.Itmayreflectvaryinglevelsofconsensusandvetting.ShortcutH:CAT
Wikipediadatastructure
Namespaces
Subjectnamespaces
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0
(Main/Article)
Talk
1
2
User
Usertalk
3
4
Wikipedia
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5
6
File
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8
MediaWiki
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9
10
Template
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11
12
Help
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13
14
Category
Categorytalk
15
100
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101
118
Draft
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119
710
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711
828
Module
Moduletalk
829
Deprecated
2300
Gadget
Gadgettalk
2301
2302
Gadgetdefinition
Gadgetdefinitiontalk
2303
Virtualnamespaces
-1
Special
-2
Media
Categoriesareintendedtogrouptogetherpagesonsimilarsubjects.TheyareimplementedbyaMediaWikifeaturethataddsanypagewithatextlike[[Category:XYZ]]initswikimarkuptotheautomatedlistingthatisthecategorywithnameXYZ.Categorieshelpreaderstofind,andnavigatearound,asubjectarea,toseepagessortedbytitle,andtothusfindarticlerelationships.
Categoriesarenormallyfoundatthebottomofanarticlepage.Clickingacategorynamebringsupacategorypagelistingthearticles(orotherpages)thathavebeenaddedtothatparticularcategory.Theremayalsobeasectionlistingthesubcategoriesofthatcategory.Thesubcategorizationfeaturemakesitpossibletoorganizecategoriesintotree-likestructurestoaidnavigation.
Thetermcategorydoesrefertoboththetitleofacategorypage—thecategorypagename—andthecategoryitself.Keepingthisinmindwhilereadingaboutcategorization,pluslearningacategorypagelayoutisaworthwhileinvestmentinresearchtechniques.(Seealsothesearchboxparameter"incategory".)Thelayoutofacategorypageismostlytext,butseeaboutdisplayingcategorytreesbelow.
Contents
1Summary
2Categorypagedefinition
2.1Puttingpagesintocategories
3Workingwithcategorypages
3.1Linkingtocategorypages
3.2Retrievingrawcategoryinformation
3.3Sortingcategorypages
3.3.1Defaultsortkey
3.4Searchingforpagesincategories
3.5Listingallcategories
3.6Displayingcategorytreesandpagecounts
3.7Movingandredirectingcategorypages
3.8Hidingcategories
4Findingarticlesforacategory
5Categorizing
5.1Categorizingtemplates
5.2Categoriesandtemplates
5.3Categorizingredirectpages
5.4"RelatedChanges"withcategories
5.5Watchingcategoryadditionsandremovals
6Seealso
7Notes
Summary
TheMediaWikisoftwaremaintainstablesofcategories,towhichanyeditablepagecanbeadded.Toaddapagetoacategory,include"[[Category:Categoryname]]"or"[[Category:Categoryname|Sortkey]]"inthatpage'swikimarkup.Thecategoriestowhichapagebelongsappearinaboxatthebottomofthepage.
Acategoryisusuallyassociatedwithacategorypageinthe"Category:"namespace.[1]Acategorypagecontainstextthatcanbeedited,likeanyotherpage,butwhenthepageisdisplayed,thelastpartofwhatisdisplayedisanautomaticallygeneratedlistofallpagesinthatcategory,intheformoflinks.Othercategorypageswhichappearinthislistaretreatedseparately,assubcategories.
ThebottomofaWikipediaarticleonChickeneyeglasses.Attheverybottomofthepage,belowtheReferences,navigationtemplatesandexternallinksareaseriesoflinks.Theselinksarethecategoriesusedonthepage,whichinclude:Category:Animalwelfare,Category:Animalequipment,Category:Eyewear,andCategory:Poultryfarming.Byclickingonthecategorylinkatthebottomofthepage,readerscannavigatetheCategorytree.
Categorypagedefinition
AcategorypageisanypageintheCategorynamespace.Theyeachactasacategory,andaretermeda"category".ThecategorypagehasonesectiontitledSubcategorieslistingother"categories",andonesectiontitledPages,listingpagesascategorized(inothernamespaces).NewcategoriesarecreatedbycreatingapageintheCategorynamespace.
Acategorypagecanbeeditedlikeanyotherpage.However,whenitisdisplayed,theeditablepartofthepageisfollowedbyautomaticallygeneratedlistsofpagesbelongingtothecategory,asfollows:
Firstacountandlistofsubcategories(othercategorypagesbelongingtothecategory)isshown,ifanyexist.Thenameofeachsubcategoryisfollowedbycountslike"(6C,38P,2F)",meaningthissubcategorycontains6subcategories,38pages,and2files.Countsof0areomitted.Thefurthersubcategoriesareexpandedinthedisplayifthe►signalongsidethesubcategoryisclicked(butthis"widget"isonlyvisibleifyourbrowserhasJavaScriptenabled).Note:►isshowniftherearenofurthersubcategories.Thesubcategoryiscollapsedagainif▼isclicked.
Nextacountandlistofpagesinthecategory(excludingsubcategoriesandimages)isshown.Ifthecategoryhasnomembers,amessagetothateffectisdisplayed.
Nextacountandlistofimageandothermediafilesinthecategoryappears,ifanyexist.Theseareshownwiththumbnails.Thefirst20charactersofthefilenameareshown,withanellipsisifthatisnotthefullname;alsothefilesizeisshown.
Theitemsinthelistsalllinktothepagesconcerned;inthecaseoftheimagesthisappliesbothtotheimageitselfandtothetextbelowit(thenameoftheimage).
Forthewayinwhichthelistsareordered,seeSortingcategorypagesbelow.Thefirstandsecondlistsaredividedintosections,accordingtothefirstcharacterofthesortkey.Theseinitialcharactersaredisplayedabovethesections.Tosuppressthese,makeallsortkeysstartwithaspace.
Acategorypagecanonlydisplayalimitednumberofitems(currently200).Ifmorepagesbelongtothecategory,therewillbealinktothenextones.
Thecategoriesboxforthecategorypageappearsatthebottom,inthesameplaceasforotherpages.Thiscontainsthecategoriestowhichthecurrentcategorypagehasbeenadded,i.e.,itsparentcategories(thecategoriesofwhichitisasubcategory).Addacategorypagetoothercategoriesinthenormalway,usingthe"[[Category:Categoryname]]"or"[[Category:Categoryname|Sortkey]]"syntax.
Puttingpagesintocategories
ShortcutWP:PAGECAT
Apagebelongstoacategoryifthepage'swikimarkupcontainsadeclarationforthatcategory.Acategorydeclarationtakestheform[[Category:Categoryname]]or[[Category:Categoryname|Sortkey]].Thedeclarationmustbeprocessed,i.e.itwillnotworkifitappearsbetween...or...tags,orinacomment.Thedeclarationmayhowevercomefromatranscludedpage;seeCategoriesandtemplatesbelow.
Acategorynamecanbeanystringthatwouldbealegitimatepagetitle.Ifthecategorynamebeginswithalower-caseletter,itwillbecapitalized.Forinitiallower-caseletters,asinCategory:macOS,seethetechnicalrestrictionspage.
OnWikipedia,itiscustomarytoplacecategorydeclarationsattheendofthewikimarkup,butbeforeanystubtemplates(whichthemselvestranscludecategories)andinterlanguagelinks.
Whenapagehasbeenaddedtooneormorecategories,acategoriesboxappearsatthebottomofthepage(orpossiblyelsewhere,ifanon-defaultskinisbeingused).Thisboxcontainsalistofthecategoriesthepagebelongsto,intheorderinwhichthecategorydeclarationsappearintheprocessedwikimarkup.Thecategorynamesarelinkedtothecorrespondingcategorypages.Theyappearasredlinksifthecorrespondingcategorypagedoesnotexist.IfauserhasenabledtheHotCatgadget,thecategoriesboxwillalsoprovidelinkstoquicklyadd,remove,ormodifycategorydeclarationsonthepage,withouthavingtoeditthewholepage.
Hiddencategoriesarenotdisplayed,exceptasdescribedbelowunderHidingcategories.
Workingwithcategorypages
Thefollowingsubsectionsareorderedfromsimpleactionstomoreelaborateorrareractions.
Linkingtocategorypages
Tolinktoacategorypagewithoutputtingthecurrentpageinthatcategory,precedethelinkwithacolon:[[:Category:Categoryname]].Suchalinkcanbepipedlikeanormalwikilink.(The{{cl}}template,andotherslistedonitsdocumentationpage,maysometimesbehelpful.)
Retrievingrawcategoryinformation
Rawinformationaboutthemembersofacategory,theirsortkeysandtimestamps(timewhenlastaddedtothecategory)canbeobtainedfromtheAPI,usingaqueryoftheform:
https://en.wikipedia.org/w/api.php?cmtitle=Category:Category_name&action=query&list=categorymembers&cmlimit=500&cmprop=title|sortkey|timestamp
Listingsofupto500membersarepossible.Iftherearemoremembersthentheresultswillincludetextneartheendlikethis:.
Thiscanbeaddedtothepreviousone,withoutquotationmarks,forthenextpageofmembers:...&cmcontinue=page|NNNN|TITLE
Sortingcategorypages
Seealso:Help:Sorting
ShortcutWP:SORTCAT
Bydefault,apageissortedunderthefirstcharacterofitsname,withoutthenamespace.EnglishWikipediagroupsaccentedcharacterstogetherwiththeirunaccentedversion,sopagesstartingwithÀ,Á,Ä,willbelistedunderheadingA.Sortingiscase-insensitive,so"ABC"comesafter"Abacus".
UnlikeatSpecial:AllpagesandSpecial:Prefixindex,aspaceistreatedasaspace(comingbeforeallothercharacters),notasanunderscore.
TheEnglishWikipediahasnumericalsortingincategories.Thismeansapagewhosetitlebeginswithanumberwillbesortedaccordingtothenumericvalueofthenumber(evenifitismultipledigits).Thus"9dogs","25dogs",and"112dogs"willallappearunderthe"0–9"headinginnumericorder.Ifthenumberincludesacomma,space,orperiod,thesortingalgorithmwillonlyconsiderthepartofthenumberbeforetheseparator.
Eachofthethreelists(subcategories,pages,mediafiles)isarrangedintheorderexplainedabove(exceptthat,inthesubcategorieslist,thenamespaceindicator"Category:"isnotconsidered).Ifanitemoughttobepositionedwithinalistonthebasisofanalternativename(sortkey)forthatitem,thenthiscanbespecifiedinthecategorytagthatplacestheiteminthelist:
[[Category:Categoryname|Sortkey]]
Forexample,toaddanarticlecalledAlbertEinsteintothecategory"People"andhavethearticlesortedby"Einstein,Albert",youwouldtype:
[[Category:People|Einstein,Albert]]
Unlikeapipedlink(whichusesthesamesyntax),thesortkeyitselfisnotdisplayedtoreaders.Itaffectsonlytheorderinwhichpagesarelistedonthecategorypage.
Itisusefultodocumentthesystembeingusedforsortkeysonthecategorypage.ForguidelinesabouttheuseofsortkeysonWikipedia,seeWP:SORTKEY.
Defaultsortkey
ShortcutWP:DEFAULTSORT
Seealso:WP:NAMESORTandWP:SORTKEY
Itispossibletosetadefaultsortkeywhichisdifferentfrom{{PAGENAME}}byusingthemagicword{{DEFAULTSORT}}:
{{DEFAULTSORT:newkey}}
Thisisoftenusedinbiographyarticles,tomakesurethesubjectissortedbytheirlastname:
{{DEFAULTSORT:LastName,FirstName}}
Inthecaseofmultipledefaultsortkeytags,thelastDEFAULTSORTonthefinalrenderingofapageappliesforallcategories,regardlessofthepositionofthecategorytags.ThisalsomeansthataDEFAULTSORTtagincludedfromatemplateisnoteffectiveifanotherDEFAULTSORTtagoccurslateronthepage,evenifthelaterDEFAULTSORTtagisalso"hidden"(includedbyanothertemplate).Ifacategoryisaddedinside[...]thenDEFAULTSORTmaybeignored.
Searchingforpagesincategories
Furtherinformation:Help:Searching§ Syntax
Seealso:§ Searchingforarticlesincategories,Wikipedia:Categoryintersection,andWikimediabugT3497"Hierarchicalcategorysystemisurgentlyneeded"
Inadditiontobrowsingthroughhierarchiesofcategories,itispossibletousethesearchtooltofindspecificarticlesinspecificcategories.Tosearchforarticlesinaspecificcategory,typeincategory:"CategoryName"inthesearchbox.
Apipe"|"canbeaddedtojointhecontentsofonecategorywiththecontentsofanother.Forexample,enter
incategory:"Suspensionbridges|BridgesinNewYorkCity"
toreturnallpagesthatbelongtoeither(orboth)ofthecategories,ashere.
Notethatusingsearchtofindcategorieswillnotfindarticleswhichhavebeencategorizedusingtemplates.Thisfeaturealsodoesn'treturnpagesinsubcategories.
Listingallcategories
Special:Categoriesprovidesanalphabeticlistofallcategories,withthenumberofmembersofeach;thisnumberdoesnotincludethecontentofthesubcategories,butitincludesthesubcategoriesthemselves,i.e.,eachcountingasone.
Theabovelistcontainsallcategoriesthathavemembers,regardlessofwhethertheyhavecorrespondingcategorypages.Tolistallexistingcategorypages(regardlessofwhethertheyhavemembers),useSpecial:AllPages/Category:.
Displayingcategorytreesandpagecounts
Asdescribedatmw:Help:Magicwords,{{PAGESINCATEGORY:Example}}or{{PAGESINCAT:Example}}returnsthenumberofpagesin"Category:Example".Eachsubcategorycountsasonepage;pagesinsubcategoriesarenotcounted.
ThepageSpecial:CategoryTreeenablesyoutoseethetreestructureofacategory(itssubcategories,theirsubcategoriesandsoon;thedisplayoffilesandothermemberpagesisoptional).
TheCategoryTreeextensioncanbeusedtodisplaysuchatreeonanypage.(Thisissometimesdoneonthecategorypageitself,ifthecategoryissplitovermultiplescreens,tomakeallsubcategoriesavailableoneveryscreen.)Thebasicsyntaxis
Categoryname
todisplayjustthesubcategorytree,and
Categoryname
todisplaymemberpagesaswell.Theywillbeindicatedbyitalics.
Dapete'scategory-visualizervCatwillrenderchartsofthetreestructure.
YoumayalsouseTemplate:CategorytreeorTemplate:Categorytreeall,instead.
Warning:
Thefollowingcode{{PAGESINCATEGORY:{{PAGENAME}}}}willnotworkasexpectedwhenusedinthewikitextorinatranscludedtemplateinacategorypagewhosetitlecontainssomeASCIIpunctuations.
Forlegacyreasons,{{PAGENAME}}mayreturnthepagenamewiththesecharactersbeingHTML-encodedusingnumericcharacterentities :thisstillworksforgeneratingderivedwikilinksordisplayingpagenames,orwhenHTML-encodedthispagenameisusedinaconditional"#switch",butPAGESINCATEGORYdoesnotrecognizethecategorynamegiveninparameterifsomecharactersareHTML-encoded(thisisthecasenotablywhenthecategorynamecontainsASCIIapostrophes'andafewotherASCIIpunctuations.(ThesameHTML-encodingisalsoappliedtothevaluesreturnedby{{FULLPAGENAME}},{{SUBPAGENAME}},or{{NAMESPACE}}).
Inthatcase,asthecategoryisnotfoundbyitsHTML-encodedpagename,PAGESINCATEGORYwillunexpectedlyreturn0andnotitseffectivenumberofmemberpages.
AsimpleworkaroundistotransformtheseHTML-encodedcharactersbackintostandardUTF-8-encodedcharacters,byusingthe{{titleparts:}}parserfunction,likethis:
{{PAGESINCATEGORY:{{titleparts:{{PAGENAME}}}}}}
Movingandredirectingcategorypages
Categoriescanbemovedinthesamewayasanordinarypage;butacertainamountofcleanupmaybenecessary.Aredirectisleftattheoldcategoryname,andthisisnotanormal#REDIRECT [[...]]buta{{categoryredirect}}.Onceallthepageshavebeenmovedoutoftheoldcategory,itmaybeleftasacategoryredirectordeleted.Forcategoriesentirelypopulatedthroughtemplates(seeabove),modifyingthetemplatesenablesallaffectedarticlestobemovedtoanothercategory,butwiththerefreshproblemmentioned.AlmostallcategorynamechangesaremadepursuanttoaconsensusdecisionatWikipedia:Categoriesfordiscussion.
Donotcreateintercategoryredirectsotherthanwitha{{categoryredirect}}template.SeeWikipedia:Categoriesfordiscussion#Redirectingcategoriesformoreoncategoryredirects.
Hidingcategories
Whenthemagicword__HIDDENCAT__isplacedonacategorypage,thatcategorybecomeshidden,meaningthatitwillnotbedisplayedonthepagesbelongingtothatcategory.OnWikipedia,themagicwordisnotnormallyusedexplicitly,butisappliedthroughthe{{hiddencategory}}template.Thefeatureismostlyusedtopreventprojectmaintenancecategoriesfromshowinguptoordinaryreadersonarticlepages.
However,hiddencategoriesaredisplayed(althoughlistedashidden):
oncategorypages(whetherasparentcategoriesorsubcategories);
atpreviewduringediting;
iftheuserhasselected"Showhiddencategories"inuserpreferences.
HiddencategoriesareautomaticallyaddedtoCategory:Hiddencategories.
ForguidelinesonthehidingofcategoriesonWikipedia,seeWP:HIDDENCAT.
Findingarticlesforacategory
Themosteffectivewayoffindingentriesofacategoryisusingthe"Whatlinkshere"toolonthecategory'smainarticle.
Aneasywaytofindrelevantarticlesforanewcategoryormissingentriesinanexistingoneisbyfindingthemostrelevantlistandcheckingitsentries.SometimescategoriesareaboutthingsthatareintersectionsofothercategoriesforwhichthePetScantoolcanbeused.
Morerelevantarticlesmayalsobefoundlinkedinacategory'smainarticleandthearticlesalreadyfeaturedinthecategory−especiallyintheir"Seealso"sections(ifexistent)andtheautomaticallysuggested"RELATEDARTICLES"belowthem.
Furthermore,acategory'ssuperordinatecategoriesoftenfeaturearticlesthatshouldbesubcategorizedtothecategory.
OtherwaystofindrelevantarticlesincludesearchingWikipediaforthecategory'stopicandsearchingtheWebforthetopicinquotes"(withsynonymsalsoinquotesandappendedafteranOR)andappendingthewordwikiorWikipediaorsite:Wikipedia.orgtothem.
Categorizing
Mainpage:Wikipedia:Categorization
Categorizingtemplates
Templatesarecategorizedthesamewayasarticles,exceptthat[[Category:Some-topictemplates]]shouldbeplacedonthetemplate'sdocumentationpage(orinside...tags,ifthereisnodocumentationpage),thisisnecessarytoavoidcategorizingpagesbytemplateinclusion(seebelow).
Categoriesandtemplates
Atemplatecanbeusedtoaddpagestoacategory,usuallybyplacingthecategorylinkinsidetagsonthetemplate(e.g.[[Category:categoryname]]).Whenthetemplateistranscludedintothepage,thecategorylinkbecomesactive,andthepageisaddedtothecategorypage.Thisisusefulforcategoriesthathavehighturnoverormanypagesincluded,likecleanupcategories.
Changestothetemplate,however,maynotbereflectedimmediatelyonthecategorypage.Whenyoueditanarticletoaddacategorytagdirectly,thelistofcategorymembersisupdatedimmediatelywhenthepageissaved.Whenacategorylinkiscontainedinatemplate,however,thisdoesnothappenimmediately:instead,wheneveratemplateisedited,allthepagesthattranscludeitareputintothejobqueuetoberecachedduringperiodsoflowserverload.Thismeansthat,inbusyperiods,itmaytakehoursorevendaysbeforeindividualpagesarerecachedandtheystarttoappearinthecategorylist.Performinganulledittoapagewillallowittojumpthequeueandbeimmediatelyrecached.
Toaddthetemplateitselftothecategorypageaswell,omitthe"includeonly"tags.Toaddthetemplatetoacategorywithoutcategorizingpagesonwhichthetemplateistranscluded,placethecategorydeclarationbetween...tags,oraddittothetemplatedocumentationpagebetween(thelatterallowsrecategorizingthetemplatewithouteditingit,whichishelpfulifitisprotected,orsocomplicatedthatmeremortalshesitatetotouchit).
Parserfunctionscanbeusedtomakethetranscludedcategories,orthesortkeyusedinthem,dependentonothervariables,notablyPAGENAME.
Passingacategorynameasaparameter
[[Category:{{{cat|default}}}]]or{{{cat|[[Category:default]]}}}Iftheuserprovidesaparameter'cat=XXX'thepagewillbecategorizedatthepage[[Category:XXX]],otherwiseitwillbecategorizedatthepage[[Category:default]].Callingthetemplatewith"cat="(equaltonothing)disablesputtingthepageinanycategory.
Excludingnon-articlepages
{{#if:{{NAMESPACE}}||[[Category:XXX]]}}thevariableNAMESPACEisnullformainspacearticles.Foranyspaceotherthanmainspace,thisParserFunctionwillproduceanemptystring,butforregulararticlesthiswillincludethearticleinCategory:XXX.
OnWikipediaitisnotrecommendedthattemplatesbeusedtopopulateordinarycontentcategoriesofarticles.SeeCategorizationusingtemplatesinthecategorizationguideline.
Categorizingredirectpages
Mainpage:Wikipedia:Categorizingredirects
Redirectpagescanbecategorizedandthereareconventionsonhowtodoit.Theredirectlinkmustbefirstonthepage.Onacategorypage,redirectsarelistedinitalics.
"RelatedChanges"withcategories
Foracategory,the"RelatedChanges"feature,whenappliedtothecorrespondingcategorypage,listsrecentchangestothepageswhicharecurrentlylistedasbelongingtoacategory.Wherethosepagesaresubcategoriesorimagepages,onlychangestotheireditablepartsarelisted.
Noticethat"RelatedChanges"doesnotshoweditstopagesthathavebeenremovedfromthecategory.
Also,"RelatedChanges"doesnotlistrecentchangestopageslinkedfromtheeditablepartofthecategorypage(asitwouldnormally,withanon-categorypage).Ifaworkaroundwouldberequired,thelinksinquestioncouldbeplacedinatemplateandtranscludedontothecategorypage.
Asusual–unlikewithwatchlists–recentchangestocorrespondingtalkpagesarenotshownunder"RelatedChanges".Pagesoneiswatchingareboldedonthelist.Thiscanhelptofindwhichpagesinagivencategoryonehasonone'swatchlist.
TheDynamicPageList(third-party)extensionprovidesalistoflasteditstothepagesinacategory,oroptionally,justthelistofpages;thesimplerDynamicPageList(Wikimedia)isinstalledonMeta,Wikinews,WikibooksandWikiversity;theextensionmw:Extension:DPLforumisinstalledonWikia.
Watchingcategoryadditionsandremovals
Since2016,additionsandremovalsfromcategoriesareavailableviathe"Categorychanges"filteronrecentchangespages,includingwatchlistsandSpecial:RecentChangesLinked.Forexample,categorychangestoarticlesinCategory:Cannabisstubscanbefoundhere.Youcanmonitoradditionsandremovalsfromspecificcategoriesbyaddingthecategoriestoyourwatchlistandmakingsurethe"Categorychanges"filterisactive.Youcanviewchangestocategoriesinyourwatchlistbyclickinghere.AdditionalscriptswithsimilarfunctionalityareUser:CategoryWatchlistBotandUser:Ais523/catwatch.
Seealso
MediaWiki:Help:Categories
Template:CategoryTOC
Wikipedia:FAQ/Categorization
Wikipedia:WikiProjectCategories
Wikipedia:Quickcatindex
Notes
^Thecategoryitselfispermanentlycreatedassoonasithasbeensavedontoanypage.Unlessyoucreateacategorypage,itwilldisplayasaredlink.Unlessyouaddanothercategorytothecategorypage,itwillnotbeplacedinthecategorytree.Categorypagesarecreatedlikeanyotherpage.Mostcommonly,editorsclickontheredlinkinanarticleandcreatethecategorypagethatway.
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