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<div id="mw-head-base" class="noprint"></div> <div id="content" class="mw-body" role="main"> <a id="top"></a> <div id="siteNotice"></div> <div class="mw-indicators"> </div> <h1 id="firstHeading" class="firstHeading" lang="en">Wikipedia:Categorization</h1> <div id="bodyContent" class="mw-body-content"> <div id="siteSub">From Wikipedia, the free encyclopedia</div> <div id="contentSub"></div> <div id="jump-to-nav" class="mw-jump"> Jump to: <a href="#mw-head">navigation</a>, <a href="#p-search">search</a> </div> <div id="mw-content-text" lang="en" dir="ltr" class="mw-content-ltr"><div class="metadata topicon nopopups" id="protected-icon" style="display:none;right:55px"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Protection_policy#semi" title="This page is semi-protected."><img alt="Page semi-protected" src="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Padlock-silver.svg/20px-Padlock-silver.svg.png" width="20" height="20" srcset="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Padlock-silver.svg/30px-Padlock-silver.svg.png 1.5x, //web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Padlock-silver.svg/40px-Padlock-silver.svg.png 2x" data-file-width="128" data-file-height="128"/></a></div> <div class="hatnote">Multiple shortcuts redirect here, you may be looking for: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Cats" title="Wikipedia:WikiProject Cats">WikiProject Cats</a>, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:HotCat" title="Wikipedia:HotCat">Wikipedia:HotCat</a> or <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Categories" title="Wikipedia:WikiProject Categories">WikiProject Categories</a>. For the category system itself, see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Contents" title="Category:Contents">Category:Contents</a>.</div> <table class="plainlinks ombox ombox-notice" role="presentation"> <tr> <td class="mbox-image"><img alt="Blue tick" src="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Blue_check.svg/30px-Blue_check.svg.png" width="30" height="30" srcset="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Blue_check.svg/45px-Blue_check.svg.png 1.5x, //web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Blue_check.svg/60px-Blue_check.svg.png 2x" data-file-width="600" data-file-height="600"/></td> <td class="mbox-text"><b>This page documents an English Wikipedia <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_editing_guidelines" title="Category:Wikipedia editing guidelines">editing guideline</a>.</b> It is a generally accepted standard that editors should attempt to follow, though it is best treated with <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:What_%22Ignore_all_rules%22_means#Use_common_sense" title="Wikipedia:What "Ignore all rules" means">common sense</a>, and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Ignore_all_rules" title="Wikipedia:Ignore all rules">occasional exceptions</a> may apply. Any substantive edit to this page should reflect <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Consensus" title="Wikipedia:Consensus">consensus</a>. When in doubt, discuss first on the <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia_talk:Categorization" title="Wikipedia talk:Categorization">talk page</a>.</td> <td class="mbox-imageright"> <table class="shortcutbox noprint" style="float: right; border: 1px solid #aaa; background: #fff; margin: 0; padding: 1px; text-align: center; line-height: 1.1em"> <tr> <th style="border: none; background: transparent;"><span id="WP:CAT"></span><span id="WP:CATEGORY"></span><span id="WP:CG"></span><span id="WP:MOSCAT"></span><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcuts</a>:<br/> <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:CAT" title="Wikipedia:CAT" class="mw-redirect">WP:CAT</a><br/> <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:CATEGORY" title="Wikipedia:CATEGORY" class="mw-redirect">WP:CATEGORY</a><br/> <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:CG" title="Wikipedia:CG" class="mw-redirect">WP:CG</a><br/> <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:MOSCAT" title="Wikipedia:MOSCAT" class="mw-redirect">WP:MOSCAT</a></small></th> </tr> </table> </td> </tr> </table> <table class="vertical-navbox nowraplinks hlist" style="float:right;clear:right;width:22.0em;margin:0 0 1.0em 1.0em;background:#f9f9f9;border:1px solid #aaa;padding:0.2em;border-spacing:0.4em 0;text-align:center;line-height:1.4em;font-size:88%;width:auto;background:#f5faff;font-size:90%;line-height:1.6em; clear:right;width:21.5em;"> <tr> <th style="background:#cee0f2;;padding:0.2em 0.4em 0.2em;font-size:145%;line-height:1.2em;font-size:130%;padding-left:0.4em;padding-right:0.4em; display:block;margin-bottom:6px;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_guidelines" title="Category:Wikipedia guidelines">Wikipedia guidelines</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.15em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines" title="Wikipedia:List of guidelines">Guidelines list</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_policies" title="Wikipedia:List of policies">Policies list</a></li> </ul> </td> </tr> <tr> <th style="padding:0.1em;background:#cee0f2;;padding:0.1em 0.25em 0.15em;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_behavioral_guidelines" title="Category:Wikipedia behavioral guidelines">Behavioral guidelines</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.15em;"> <table class="vertical-navbox nowraplinks" style="float:right;clear:right;width:22.0em;margin:0 0 1.0em 1.0em;background:#f9f9f9;border:1px solid #aaa;padding:0.2em;border-spacing:0.4em 0;text-align:center;line-height:1.4em;font-size:88%;border-collapse:collapse; border-spacing:0px; border:none; width:100%; margin:0px; font-size:100%; clear:none; float:none"> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.2em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Assume_good_faith" title="Wikipedia:Assume good faith">Assume good faith</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Conflict_of_interest" title="Wikipedia:Conflict of interest">Conflict of interest</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Courtesy_vanishing" title="Wikipedia:Courtesy vanishing">Courtesy vanishing</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Disruptive_editing" title="Wikipedia:Disruptive editing">Disruptive editing</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Please_do_not_bite_the_newcomers" title="Wikipedia:Please do not bite the newcomers">Don't bite the newbies</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Do_not_disrupt_Wikipedia_to_illustrate_a_point" title="Wikipedia:Do not disrupt Wikipedia to illustrate a point"><span class="wrap">Don't edit to make a point</span></a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Etiquette" title="Wikipedia:Etiquette">Etiquette</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Gaming_the_system" title="Wikipedia:Gaming the system">Don't game the system</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:User_pages" title="Wikipedia:User pages">User pages</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Behavioral" title="Wikipedia:List of guidelines">Other behavioral guidelines</a></li> </ul> </td> </tr> <tr> <th style="padding:0.1em;background:#e5eef8;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_discussion" title="Category:Wikipedia discussion">Discussion guidelines</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.2em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Talk_page_guidelines" title="Wikipedia:Talk page guidelines">Talk page guidelines</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">Signatures</a></li> </ul> </td> </tr> </table> </td> </tr> <tr> <th style="padding:0.1em;background:#cee0f2;;padding:0.1em 0.25em 0.15em;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_content_guidelines" title="Category:Wikipedia content guidelines">Content guidelines</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.15em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources">Citing sources</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sources" title="Wikipedia:Identifying reliable sources"><span class="wrap">Identifying reliable sources</span></a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Fringe_theories" title="Wikipedia:Fringe theories">Fringe theories</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Notability" title="Wikipedia:Notability">Notability</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Non-free_content" title="Wikipedia:Non-free content"><span class="wrap">Non-free content</span></a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Offensive_material" title="Wikipedia:Offensive material">Offensive material</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Do_not_include_the_full_text_of_lengthy_primary_sources" title="Wikipedia:Do not include the full text of lengthy primary sources">Don't copy long texts</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Do_not_create_hoaxes" title="Wikipedia:Do not create hoaxes">Don't create hoaxes</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Patent_nonsense" title="Wikipedia:Patent nonsense">Patent nonsense</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Content" title="Wikipedia:List of guidelines">Other content guidelines</a></li> </ul> </td> </tr> <tr> <th style="padding:0.1em;background:#cee0f2;;padding:0.1em 0.25em 0.15em;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_editing_guidelines" title="Category:Wikipedia editing guidelines">Editing guidelines</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.15em;"> <table class="vertical-navbox nowraplinks" style="float:right;clear:right;width:22.0em;margin:0 0 1.0em 1.0em;background:#f9f9f9;border:1px solid #aaa;padding:0.2em;border-spacing:0.4em 0;text-align:center;line-height:1.4em;font-size:88%;border-collapse:collapse; border-spacing:0px; border:none; width:100%; margin:0px; font-size:100%; clear:none; float:none"> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.2em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Article_size" title="Wikipedia:Article size">Article size</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Be_bold" title="Wikipedia:Be bold">Be bold</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Edit_summary" title="Help:Edit summary">Edit summary</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcuts</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Make_technical_articles_understandable" title="Wikipedia:Make technical articles understandable">Understandability</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Editing" title="Wikipedia:List of guidelines">Other editing guidelines</a></li> </ul> </td> </tr> <tr> <th style="padding:0.1em;background:#e5eef8;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_categorization" title="Category:Wikipedia categorization">Organization guidelines</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.2em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categories,_lists,_and_navigation_templates" title="Wikipedia:Categories, lists, and navigation templates">Categories, lists, templates</a></li> <li><strong class="selflink">Categorization</strong></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Disambiguation" title="Wikipedia:Disambiguation">Disambiguation</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Subpages" title="Wikipedia:Subpages">Subpages</a></li> </ul> </td> </tr> </table> </td> </tr> <tr> <th style="padding:0.1em;background:#cee0f2;;padding:0.1em 0.25em 0.15em;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_style_guidelines" title="Category:Wikipedia style guidelines">Style guidelines</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.15em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style" title="Wikipedia:Manual of Style">Manual of Style</a> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Contents" title="Wikipedia:Manual of Style/Contents">contents</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Lists" title="Wikipedia:Manual of Style/Lists">lists</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Tables" title="Wikipedia:Manual of Style/Tables">tables</a></li> </ul> </li> </ul> </td> </tr> <tr> <th style="padding:0.1em;background:#cee0f2;;padding:0.1em 0.25em 0.15em;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_deletion_guidelines" title="Category:Wikipedia deletion guidelines">Deletion guidelines</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.15em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Deletion_process" title="Wikipedia:Deletion process">Deletion process</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Speedy_keep" title="Wikipedia:Speedy keep">Speedy keep</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Deletion_guidelines_for_administrators" title="Wikipedia:Deletion guidelines for administrators">Deletion guidelines for administrators</a></li> </ul> </td> </tr> <tr> <th style="padding:0.1em;background:#cee0f2;;padding:0.1em 0.25em 0.15em;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Categories_of_guidelines" title="Wikipedia:List of guidelines">Other guideline categories</a></th> </tr> <tr> <td style="padding:0 0.1em 0.4em;padding-top:0.15em;"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Naming_conventions" title="Wikipedia:List of guidelines">Naming conventions</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Notability" title="Wikipedia:List of guidelines">Notability</a></li> </ul> </td> </tr> <tr> <td style="text-align:right;font-size:115%"> <div class="plainlinks hlist navbar mini"> <ul> <li class="nv-view"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Guideline_list" title="Template:Guideline list"><span title="View this template">v</span></a></li> <li class="nv-talk"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template_talk:Guideline_list" title="Template talk:Guideline list"><span title="Discuss this template">t</span></a></li> <li class="nv-edit"><a class="external text" href="//web.archive.org/web/20150321225939/https://en.wikipedia.org/w/index.php?title=Template:Guideline_list&action=edit"><span title="Edit this template">e</span></a></li> </ul> </div> </td> </tr> </table> <p>This page contains guidance on the proper use of the <b>categorization</b> function in Wikipedia. For information on the mechanics of the function, category syntax, etc., see <b><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Category" title="Help:Category">Help:Category</a></b>. For quick answers, see the <b><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:FAQ/Categorization" title="Wikipedia:FAQ/Categorization">Categorization FAQ</a></b>. For proposals to delete, merge, or rename categories, follow the instructions at <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categories_for_discussion" title="Wikipedia:Categories for discussion">Categories for discussion</a>. Please use it before undertaking any complicated re-categorization of existing categories or mass creation of new categories.</p> <p>The central goal of the category system is to provide navigational links to all Wikipedia pages in a hierarchy of <i>categories</i> which readers, knowing essential—<i>defining</i>—characteristics of a topic, can browse and quickly find sets of pages on topics that are defined by those characteristics.</p> <p>Categories are not the only means of enabling users to browse sets of related pages. Other tools which may be used instead of or alongside categories in particular instances include lists and navigation boxes. For a comparison of these techniques, see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categories,_lists,_and_navigation_templates" title="Wikipedia:Categories, lists, and navigation templates">Categories, lists and navigation templates</a>.</p> <p></p> <div id="toc" class="toc"> <div id="toctitle"> <h2>Contents</h2> </div> <ul> <li class="toclevel-1 tocsection-1"><a href="#Naming_conventions"><span class="tocnumber">1</span> <span class="toctext">Naming conventions</span></a> <ul> <li class="toclevel-2"><a href="#General_conventions"><span class="tocnumber">1.1</span> <span class="toctext">General conventions</span></a></li> <li class="toclevel-2"><a href="#Special_conventions"><span class="tocnumber">1.2</span> <span class="toctext">Special conventions</span></a></li> </ul> </li> <li class="toclevel-1 tocsection-2"><a href="#Creating_category_pages"><span class="tocnumber">2</span> <span class="toctext">Creating category pages</span></a></li> <li class="toclevel-1 tocsection-3"><a href="#Categorizing_pages"><span class="tocnumber">3</span> <span class="toctext">Categorizing pages</span></a> <ul> <li class="toclevel-2 tocsection-4"><a href="#Articles"><span class="tocnumber">3.1</span> <span class="toctext">Articles</span></a> <ul> <li class="toclevel-3 tocsection-5"><a href="#Eponymous_categories"><span class="tocnumber">3.1.1</span> <span class="toctext">Eponymous categories</span></a></li> </ul> </li> <li class="toclevel-2 tocsection-6"><a href="#Files.2Fimages"><span class="tocnumber">3.2</span> <span class="toctext">Files/images</span></a></li> <li class="toclevel-2 tocsection-7"><a href="#Wikipedia_administrative_categories"><span class="tocnumber">3.3</span> <span class="toctext">Wikipedia administrative categories</span></a></li> <li class="toclevel-2 tocsection-8"><a href="#User_pages"><span class="tocnumber">3.4</span> <span class="toctext">User pages</span></a></li> <li class="toclevel-2 tocsection-9"><a href="#Draft_pages"><span class="tocnumber">3.5</span> <span class="toctext">Draft pages</span></a></li> <li class="toclevel-2 tocsection-10"><a href="#Template_categorization"><span class="tocnumber">3.6</span> <span class="toctext">Template categorization</span></a></li> <li class="toclevel-2 tocsection-11"><a href="#Categorization_using_templates"><span class="tocnumber">3.7</span> <span class="toctext">Categorization using templates</span></a> <ul> <li class="toclevel-3 tocsection-12"><a href="#Hiding_categories"><span class="tocnumber">3.7.1</span> <span class="toctext">Hiding categories</span></a></li> <li class="toclevel-3 tocsection-13"><a href="#Redirected_categories"><span class="tocnumber">3.7.2</span> <span class="toctext">Redirected categories</span></a></li> </ul> </li> </ul> </li> <li class="toclevel-1 tocsection-14"><a href="#Sort_keys"><span class="tocnumber">4</span> <span class="toctext">Sort keys</span></a></li> <li class="toclevel-1 tocsection-15"><a href="#Category_tree_organization"><span class="tocnumber">5</span> <span class="toctext">Category tree organization</span></a> <ul> <li class="toclevel-2 tocsection-16"><a href="#Subcategorization"><span class="tocnumber">5.1</span> <span class="toctext">Subcategorization</span></a> <ul> <li class="toclevel-3 tocsection-17"><a href="#Diffusing_large_categories"><span class="tocnumber">5.1.1</span> <span class="toctext">Diffusing large categories</span></a></li> <li class="toclevel-3 tocsection-18"><a href="#Non-diffusing_subcategories"><span class="tocnumber">5.1.2</span> <span class="toctext">Non-diffusing subcategories</span></a></li> </ul> </li> </ul> </li> <li class="toclevel-1 tocsection-19"><a href="#See_also"><span class="tocnumber">6</span> <span class="toctext">See also</span></a> <ul> <li class="toclevel-2 tocsection-20"><a href="#For_browsing"><span class="tocnumber">6.1</span> <span class="toctext">For browsing</span></a></li> <li class="toclevel-2 tocsection-21"><a href="#For_maintenance"><span class="tocnumber">6.2</span> <span class="toctext">For maintenance</span></a></li> </ul> </li> <li class="toclevel-1 tocsection-22"><a href="#Notes"><span class="tocnumber">7</span> <span class="toctext">Notes</span></a></li> </ul> </div> <p></p> <h2><span class="mw-headline" id="Naming_conventions">Naming conventions</span></h2> <div class="hatnote">Further information: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Category_names" title="Wikipedia:Category names">Wikipedia:Category names</a></div> <p>When naming a category, one should be particularly careful and choose its name accurately. Moving non-conventionally categorized pages to another category name (see {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Category_redirect" title="Template:Category redirect">Category redirect</a>}}) imposes an additional overhead – an edit for <i>each</i> article and subcategory.</p> <h3><span class="mw-headline" id="General_conventions">General conventions</span></h3> <ul> <li>Standard article <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Naming_conventions" title="Wikipedia:Naming conventions" class="mw-redirect">naming conventions</a> apply; in particular, do not capitalize regular nouns except when they come at the beginning of the title.</li> <li>Names of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Topic_category" title="Wikipedia:Topic category" class="mw-redirect">topic categories</a> should be singular, normally corresponding to the name of a Wikipedia article. Examples: "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Law" title="Category:Law">Law</a>", "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:France" title="Category:France">France</a>", "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:George_W._Bush" title="Category:George W. Bush">George W. Bush</a>".</li> <li>Names of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Set_category" title="Wikipedia:Set category" class="mw-redirect">set categories</a> should be plural. Examples: "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Writers" title="Category:Writers">Writers</a>", "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Villages_in_Poland" title="Category:Villages in Poland">Villages in Poland</a>".</li> <li>Avoid abbreviations. Example: "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Military_equipment_of_World_War_II" title="Category:Military equipment of World War II">Category:Military equipment of World War II</a>", not ":Category:Military equipment of WW2". However, abbreviations that have become the official or generally used name (such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:NATO" title="Category:NATO">NATO</a>) should be used where there are no other conflicts.</li> <li>Don't write the category structure in names. Example: "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Monarchs" title="Category:Monarchs">Monarchs</a>", not "People - Monarchs".</li> <li>Choose category names that can stand alone, independent of the way a category is connected to other categories. Example: "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Geography_terminology_stubs" title="Category:Geography terminology stubs">Geography terminology stubs</a>", not "Terminology" (a subcategory of "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Geography_stubs" title="Category:Geography stubs">Geography stubs</a>").</li> <li>As with <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:LISTNAME" title="Wikipedia:LISTNAME" class="mw-redirect">lists</a>, avoid descriptive adjectives such as <i>famous</i>, <i>important</i>, or <i>notable</i> in category titles.</li> <li>Particularly for technical subjects, use words and phrases which exist in reliable sources, so that those sources may be used to support inclusion of articles.</li> </ul> <h3><span class="mw-headline" id="Special_conventions">Special conventions</span></h3> <ul> <li>Note that in many instances a topic category and a set category have similar names, the topic category being singular and the set category plural. For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Opera" title="Category:Opera">Opera</a> is a topic category (containing all articles relating to the topic), while <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Operas" title="Category:Operas">Operas</a> is a set category (containing articles about specific operas). Be careful to choose the right one when categorizing articles.</li> <li>If there are a lot of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List" title="Wikipedia:List" class="mw-redirect">lists</a> in a particular subject area, it may be useful to have a category to hold them, called something like "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Lists_of_countries" title="Category:Lists of countries">Category:Lists of countries</a>". These categories should only contain list pages (for example "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/List_of_Soviet_Republics" title="List of Soviet Republics" class="mw-redirect">List of Soviet Republics</a>", "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/List_of_countries_by_population" title="List of countries by population" class="mw-redirect">List of countries by population</a>"). When placing pages in such a category, use a <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:SORTKEY" title="Wikipedia:SORTKEY" class="mw-redirect">sort key</a> that excludes the phrase "List of" (otherwise all lists would appear under "L"). See also <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Lists" title="Category:Lists">Category:Lists</a>.</li> <li>All <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject" title="Wikipedia:WikiProject">WikiProject</a> categories should have "WikiProject" (or "WikiProjects") as part of the name. Note that this does not apply to the names of categories that projects might create for the use of assessments. In these cases, the advice given in <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Council/Guide/WikiProject#Project_categories" title="Wikipedia:WikiProject Council/Guide/WikiProject">Project Categories</a>, which conforms to <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_1.0_assessments" title="Category:Wikipedia 1.0 assessments">Category:Wikipedia 1.0 assessments</a> is advised, though not mandatory.</li> <li>Categories used for Wikipedia administration are prefixed with the word "Wikipedia" (no colon) if this is needed to prevent confusion with content categories. For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Inactive_project_pages" title="Category:Inactive project pages">Category:Inactive project pages</a> (where no confusion is likely), but <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_tools" title="Category:Wikipedia tools">Category:Wikipedia tools</a> (as distinct from the content category <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Tools" title="Category:Tools">Tools</a>).</li> <li>Naming guidelines for sub-categories of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Stub_categories" title="Category:Stub categories">Category:Stub categories</a> are listed at <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Stub_sorting/Naming_guidelines#Categories" title="Wikipedia:WikiProject Stub sorting/Naming guidelines" class="mw-redirect">Wikipedia:WikiProject Stub sorting/Naming guidelines#Categories</a>.</li> <li>For categorization in userspace, see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categorization#User_namespace" title="Wikipedia:Categorization">Wikipedia:Categorization#User namespace</a> and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:User_categories#Naming_conventions" title="Wikipedia:User categories">Wikipedia:User categories#Naming conventions</a>.</li> <li>For geographical photo requests, the category name should be 'Wikipedia requested photographs in xxx' as in [[Category:Wikipedia requested photographs in England]]. Wikiprojects desiring to keep track of articles needing photos should use 'xxxx articles needing photos' as in [[Category:England articles needing photos]] and [[Category:England articles needing images]] (for photos, maps, drawings, etc.)</li> </ul> <h2><span class="mw-headline" id="Creating_category_pages">Creating category pages</span></h2> <div class="hatnote boilerplate seealso">See also: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:HotCat" title="Wikipedia:HotCat">Wikipedia:HotCat</a></div> <p>After you have determined an appropriate category name <i>and</i> know its parent category, you are ready to create the new category. To create a category, first add an article to that category. Do this by editing the article page. At the bottom, but before the <a href="/web/20150321225939/https://en.wikipedia.org/wiki/H:ILL" title="H:ILL" class="mw-redirect">interwiki links</a> (if any are present), add the name of the new category, (e.g.: <code><span class="mw-geshi text source-text">[[Category:New category name]]</span></code> ), and save your edit. The as-yet-undefined category name will now appear as a red link in the article's category list at the bottom of the page.</p> <p>Next, to create the category, click on that red link, which brings you back into the editor. Adding this new category into the appropriate parent category is much the same as with an article: at the bottom, simply add the parent category (e.g.: <code><span class="mw-geshi text source-text">[[Category:Parent category name]]</span></code> ).</p> <p>Sometimes, a common-sense guess based on the title of the category isn't enough to figure out whether a page should be listed in the category. So, rather than leave the text of a category page empty (containing only parent category declarations), it is helpful – to both readers and editors – to include a description of the category, indicating what pages it should contain, how they should be subcategorized, and so on.</p> <p>In such cases, the desired contents of the category should be described on the category page, similar to how the <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:LSC" title="Wikipedia:LSC" class="mw-redirect">list selection criteria</a> are described in a stand-alone list. The category description should make direct statements about the criteria by which pages should be selected for inclusion in (or exclusion from) the category. This description, not the category's name, defines the proper content of the category. Do not leave future editors to guess about what or who should be included from the title of the category. Even if the selection criteria might seem obvious to you, an explicit standard is helpful to others, especially if they are less familiar with the subject.</p> <p>The description can also contain links to other Wikipedia pages, in particular to other related categories which do not appear directly as subcategories or parent categories, and to relevant categories at <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Wikimedia_sister_projects" title="Wikipedia:Wikimedia sister projects">sister projects</a>, such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Commons" title="Wikipedia:Commons" class="mw-redirect">Commons</a>. Another technique that can be used is described at <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Classification" title="Wikipedia:Classification">Wikipedia:Classification</a>. Like <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Disambiguation" title="Wikipedia:Disambiguation">disambiguation</a> pages, category pages should not contain either citations to <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sources" title="Wikipedia:Identifying reliable sources">reliable sources</a> or <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:External_links" title="Wikipedia:External links">external links</a>.</p> <p>Various templates have been developed to make it easier to produce category descriptions; see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Category_namespace_templates" title="Category:Category namespace templates">Category namespace templates</a>. There are hatnote templates including {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Cat_main" title="Template:Cat main">Cat main</a>}} and {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Category_see_also" title="Template:Category see also">Category see also</a>}}; others are listed at <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Hatnote_templates_documentation#Categories" title="Template:Hatnote templates documentation">Template:Hatnote templates documentation#Categories</a>.</p> <p>A maximum of 200 category entries are displayed per screen. To make navigating large categories easier, a table of contents can be used on the category page. The following templates are some of the ways of doing this:</p> <ul> <li>{{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Category_TOC" title="Template:Category TOC">Category TOC</a>}} – adds a complete table of contents (Top, 0–9, A–Z)</li> <li>{{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Large_category_TOC_2" title="Template:Large category TOC 2">Large category TOC 2</a>}} – adds a complete table of contents with five subdivisions for each letter (Aa Ae Aj Ao At)</li> <li>{{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Large_category_TOC" title="Template:Large category TOC">Large category TOC</a>}} – adds a complete table of contents with twenty-six subdivisions for each letter (Aa ... Az)</li> </ul> <p>Subcategories are split alphabetically along with the articles, which means that the initial screen of a split category may not include all its subcategories. To make all subcategories display on each screen, add a category tree to the text of the category page, as described at the help page under <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Category#Displaying_category_trees_and_page_counts" title="Help:Category">Displaying category trees and page counts</a>.</p> <p><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Interlanguage_links" title="Help:Interlanguage links">Interlanguage links</a> work on category pages just as they do for articles, and can be used to link to corresponding categories on other language Wikipedias.</p> <h2><span class="mw-headline" id="Categorizing_pages">Categorizing pages</span></h2> <div class="thumb tright"> <div class="thumbinner" style="width:222px;"> <div id="mwe_player_0" class="PopUpMediaTransform" style="width:220px;" videopayload="<div class="mediaContainer" style="position:relative;display:block;width:590px"><video id="mwe_player_1" style="width:590px;height:480px" poster="//upload.wikimedia.org/wikipedia/commons/thumb/9/93/Category_explanation.ogv/590px--Category_explanation.ogv.jpg" controls="" preload="none" autoplay="" class="kskin" data-durationhint="342.72653061224" data-startoffset="0" data-mwtitle="Category_explanation.ogv" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/93/Category_explanation.ogv/Category_explanation.ogv.480p.ogv" type="video/ogg; codecs=&quot;theora, vorbis&quot;" transcodekey="480p.ogv" data-title="Web streamable Ogg video (480P)" data-shorttitle="Ogg 480P" data-width="590" data-height="480" data-bandwidth="272560" data-framerate="15" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/93/Category_explanation.ogv/Category_explanation.ogv.480p.webm" type="video/webm; codecs=&quot;vp8, vorbis&quot;" transcodekey="480p.webm" data-title="Web streamable WebM (480P)" data-shorttitle="WebM 480P" data-width="590" data-height="480" data-bandwidth="422408" data-framerate="15" /><source src="//upload.wikimedia.org/wikipedia/commons/9/93/Category_explanation.ogv" type="video/ogg; codecs=&quot;theora, vorbis&quot;" data-title="Original Ogg file, 640 × 520 (664 kbps)" data-shorttitle="Ogg source" data-width="640" data-height="520" data-bandwidth="664357" data-framerate="15" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/93/Category_explanation.ogv/Category_explanation.ogv.160p.ogv" type="video/ogg; codecs=&quot;theora, vorbis&quot;" transcodekey="160p.ogv" data-title="Low bandwidth Ogg video (160P)" data-shorttitle="Ogg 160P" data-width="196" data-height="160" data-bandwidth="53288" data-framerate="15" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/93/Category_explanation.ogv/Category_explanation.ogv.360p.ogv" type="video/ogg; codecs=&quot;theora, vorbis&quot;" transcodekey="360p.ogv" data-title="Web streamable Ogg video (360P)" data-shorttitle="Ogg 360P" data-width="444" data-height="360" data-bandwidth="161960" data-framerate="15" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/93/Category_explanation.ogv/Category_explanation.ogv.360p.webm" type="video/webm; codecs=&quot;vp8, vorbis&quot;" transcodekey="360p.webm" data-title="Web streamable WebM (360P)" data-shorttitle="WebM 360P" data-width="444" data-height="360" data-bandwidth="240736" data-framerate="15" />Sorry, your browser either has JavaScript disabled or does not have any supported player.<br /> You can <a href="//upload.wikimedia.org/wikipedia/commons/9/93/Category_explanation.ogv">download the clip</a> or <a href="https://www.mediawiki.org/wiki/Special:MyLanguage/Extension:TimedMediaHandler/Client_download">download a player</a> to play the clip in your browser.</video></div>"><img alt="File:Category explanation.ogv" style="width:220px;height:179px" src="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Category_explanation.ogv/220px--Category_explanation.ogv.jpg"/><a href="//web.archive.org/web/20150321225939/https://upload.wikimedia.org/wikipedia/commons/9/93/Category_explanation.ogv" title="Play media" target="new"><span class="play-btn-large"><span class="mw-tmh-playtext">Play media</span></span></a></div> <div class="thumbcaption"> <div class="magnify"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/File:Category_explanation.ogv" class="internal" title="Enlarge"></a></div> A screencast showing how to categorise pages and explaining the usage of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:HOTCAT" title="Wikipedia:HOTCAT" class="mw-redirect">HotCat</a></div> </div> </div> <div class="hatnote boilerplate seealso">See also: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categorizing_redirects" title="Wikipedia:Categorizing redirects">Wikipedia:Categorizing redirects</a></div> <p>Every Wikipedia page should belong to at least one category. (However, there is no need to categorize <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Talk_page" title="Wikipedia:Talk page" class="mw-redirect">talk pages</a>, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Redirect" title="Wikipedia:Redirect">redirects</a>, or <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:User_page" title="Wikipedia:User page" class="mw-redirect">user pages</a>, though these may be placed in categories where appropriate.) In addition, each categorized page should be placed in all of the <i>most specific</i> categories to which it logically belongs. This means that if a page belongs to a <a href="#Subcategorization">subcategory</a> of C (or a subcategory of a subcategory of C, and so on) then it is <i>not</i> normally placed directly into C. For exceptions to this rule, see <a href="#Eponymous_categories">Eponymous categories</a> and <a href="#Non-diffusing_subcategories">Non-diffusing subcategories</a> below.</p> <p>While it should typically be clear from the name of an existing category which pages it should contain, the text of the category page may sometimes provide additional information on potential category contents. One way to determine if suitable categories already exist for a particular page is to check the categories of pages concerning similar or related topics. Another way is to search existing category names as described <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Searching" title="Help:Searching">here</a> (top of page). Since all categories form part of a hierarchy do not add categories to pages as if they are <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Tag_(metadata)" title="Tag (metadata)">tags</a>.</p> <p>If you're not sure where to categorise a particular page, add the {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Uncategorized" title="Template:Uncategorized">uncategorized</a>}} template to it—other editors (such as those monitoring <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Categories/uncategorized" title="Wikipedia:WikiProject Categories/uncategorized">Wikipedia:WikiProject Categories/uncategorized</a>) will help find appropriate categories for it.</p> <h3><span class="mw-headline" id="Articles">Articles</span></h3> <div class="hatnote boilerplate seealso">See also: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categorization_of_people" title="Wikipedia:Categorization of people">Wikipedia:Categorization of people</a></div> <div class="hatnote">For category types to avoid, see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Overcategorization" title="Wikipedia:Overcategorization">Wikipedia:Overcategorization</a>.</div> <p>Categorization of articles must be <b><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verifiable</a></b>. It should be clear from verifiable information in the article why it was placed in each of its categories. Use the {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Category_unsourced" title="Template:Category unsourced">Category unsourced</a>}} template if you find an article in a category that is not shown by sources to be appropriate or if the article gives no clear indication for inclusion in a category.</p> <p>Categorization must also maintain a <b><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:NPOV" title="Wikipedia:NPOV" class="mw-redirect">neutral point of view</a></b>. Categorizations appear on article pages without annotations or referencing to justify or explain their addition; editors should be conscious of the need to maintain a neutral point of view when creating categories or adding them to articles. Categorizations should generally be uncontroversial; if the category's topic is likely to spark controversy, then a list article (which can be annotated and referenced) is probably more appropriate.</p> <p><span id="Defining_characteristics"></span><span id="Defining"></span></p> <div style="position:relative;top:-3em"><span id="WP:CATDEF"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:CATDEF" title="Wikipedia:CATDEF" class="mw-redirect">WP:CATDEF</a></small></li> </ul> </th> </tr> </table> <p>A central concept used in categorising articles is that of the <b><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:DEFINING" title="Wikipedia:DEFINING" class="mw-redirect">defining</a></b> characteristics of a subject of the article. A defining characteristic is one that <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:RS" title="Wikipedia:RS" class="mw-redirect">reliable sources</a> <i>commonly</i> and <i>consistently</i> define<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span>[</span>1<span>]</span></a></sup> the subject as having—such as nationality or notable profession (in the case of people), type of location or region (in the case of places), etc. For example, here: "Caravaggio, an Italian artist of the Baroque movement ...", <i>Italian</i>, <i>artist</i>, and <i>Baroque</i> may all be considered to be defining characteristics of the subject <i>Caravaggio</i>.</p> <p>Particular considerations for categorizing articles:</p> <ul> <li>By convention, category declarations are placed at the end of the wikitext, but before any <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Stub" title="Wikipedia:Stub">stub</a> templates (which themselves transclude categories).</li> <li>The order in which categories are placed on a page is not governed by any single rule (for example, it does not need to be alphabetical, although partially alphabetical ordering can sometimes be helpful). Normally the most essential, significant categories appear first.</li> <li>An article should never be left with a non-existent (<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:REDLINK" title="Wikipedia:REDLINK" class="mw-redirect">redlinked</a>) category on it. Either the category should be created, or else the link should be removed or changed to a category that does exist.</li> <li>Categorization should not be made by the <i>type</i> of an article. A biographical article about a specific person, for example, does not belong in <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Biography" title="Category:Biography">Category:Biography</a>.</li> <li>Articles on fictional subjects should not be categorized in a manner that confuses them with real subjects.</li> </ul> <h4><span class="mw-headline" id="Eponymous_categories">Eponymous categories</span></h4> <div style="position:relative;top:-3em"><span id="WP:EPON"></span><span id="WP:EPONYMOUS"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcuts</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:EPON" title="Wikipedia:EPON" class="mw-redirect">WP:EPON</a></small></li> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:EPONYMOUS" title="Wikipedia:EPONYMOUS" class="mw-redirect">WP:EPONYMOUS</a></small></li> </ul> </th> </tr> </table> <div class="rellink">See also <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Eponymous_categories" title="Category:Eponymous categories">Category:Eponymous categories</a>.</div> <p>A category which covers exactly the same topic as an article (e.g. <a href="/web/20150321225939/https://en.wikipedia.org/wiki/George_W._Bush" title="George W. Bush">George W. Bush</a> and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:George_W._Bush" title="Category:George W. Bush">Category:George W. Bush</a>, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Mekong" title="Mekong">Mekong</a> and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Mekong_River" title="Category:Mekong River">Category:Mekong River</a>) is known as an <b>eponymous category</b>.</p> <dl> <dt>Guidelines for eponymous categories</dt> </dl> <div class="hatnote boilerplate seealso">See also: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Eponymous_overcategorization" title="Wikipedia:Eponymous overcategorization" class="mw-redirect">Wikipedia:Eponymous overcategorization</a></div> <ol> <li>Eponymous categories typically take on a selection of the categories which are present in their corresponding articles. Eponymous categories should only take a category if it continues a logical hierarchy: for example, the article <a href="/web/20150321225939/https://en.wikipedia.org/wiki/American_football" title="American football">American football</a> belongs to <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:1869_introductions" title="Category:1869 introductions">Category:1869 introductions</a>, but that category is not a parent to <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:American_football" title="Category:American football">Category:American football</a>, because the content of the eponymous category is not a subtype of 1869-related material.</li> <li>However, by convention, many categories <i>do</i> contain their articles' eponymous categories as subcategories, even though they are not "true" subcategories.</li> </ol> <dl> <dt>Guidelines for articles with eponymous categories</dt> </dl> <ol> <li>The article itself should be a member of the eponymous category and should be sorted with a space to appear at the start of the listing (as described under <a href="#Sort_keys">Sort keys</a>).</li> <li>The article should be listed as the main article of the category using the {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Cat_main" title="Template:Cat main">cat main</a>}} template.</li> <li>Articles with an eponymous category may also be categorized in the broader categories that would be present if there were no eponymous category (e.g. the article <a href="/web/20150321225939/https://en.wikipedia.org/wiki/France" title="France">France</a> appears in both <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:France" title="Category:France">Category:France</a> and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Western_Europe" title="Category:Western Europe">Category:Western Europe</a>, even though the latter is the parent category of the former). However, this is not obligatory; editors should decide by consensus for each category tree which solution makes most sense. There are usually three options: <ol> <li>Keep both the eponymous category and the main article in the parent category. This is used in <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Western_Europe" title="Category:Western Europe">Category:Western Europe</a></li> <li>Keep just the child article. This is used in <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:British_Islands" title="Category:British Islands">Category:British Islands</a>, to prevent a loop</li> <li>Keep just the eponymous category. This is used in <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Religion_by_country" title="Category:Religion by country">Category:Religion by country</a>, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Archaeology_by_country" title="Category:Archaeology by country">Category:Archaeology by country</a>, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Architecture_by_country" title="Category:Architecture by country">Category:Architecture by country</a>, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Military_by_country" title="Category:Military by country">Category:Military by country</a> and many other categories in the <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Categories_by_country" title="Category:Categories by country">Category:Categories by country</a> tree.</li> </ol> </li> </ol> <p>If eponymous categories are categorized separately from their articles, it will be helpful to make links between the category page containing the articles and the category page containing the eponymous categories. The template {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Related_category" title="Template:Related category" class="mw-redirect">Related category</a>}} can be used for this. An example of this set-up is the linked categories <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:American_politicians" title="Category:American politicians">Category:American politicians</a> and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_categories_named_after_American_politicians" title="Category:Wikipedia categories named after American politicians">Category:Wikipedia categories named after American politicians</a>.</p> <p><span id="Images"></span></p> <h3><span class="mw-headline" id="Files.2Fimages">Files/images</span></h3> <div style="position:relative;top:-3em"><span id="WP:FILECAT"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:FILECAT" title="Wikipedia:FILECAT" class="mw-redirect">WP:FILECAT</a></small></li> </ul> </th> </tr> </table> <div class="hatnote">Further information: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Images#Image_description_pages" title="Wikipedia:Manual of Style/Images">Wikipedia:Manual of Style/Images § Image description pages</a></div> <p>Category tags can be added to <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Files" title="Help:Files">file</a>/image pages of files that have been uploaded to Wikipedia. When categorized, files are not included in the count of articles in the category, but are displayed in a separate section with a thumbnail and the name for each. A category can mix articles and images, or a separate file/image category can be created. A file category is typically a subcategory of the general category about the same subject, and a subcategory of the wider category for files, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_files" title="Category:Wikipedia files">Category:Wikipedia files</a>. To categorize a new file when uploading, simply add the category tag to the <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Edit_summary#File_upload_summary" title="Help:Edit summary">upload summary</a>.</p> <p>Freely licenced files may also be uploaded to, and categorized on, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:COMMONS" title="Wikipedia:COMMONS" class="mw-redirect">Wikimedia Commons</a>. This can be done instead of, or in addition to, uploading and categorizing on Wikipedia. Most freely licenced files will eventually be copied or moved from Wikipedia to Commons, with a mirror page remaining on Wikipedia. (For an example of one such mirror page, see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/File:Niederwald_memorial_2.JPG" title="File:Niederwald memorial 2.JPG">here</a>.) Categories should not be added to these Wikipedia mirror pages, because doing so creates a new Wikipedia page that is subject to <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:SD#F2" title="Wikipedia:SD" class="mw-redirect">speedy deletion</a>. Exceptions to this principle are made for mirror pages of images that are nominated as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Featured_pictures" title="Wikipedia:Featured pictures">featured pictures</a> and for those that appear on the Wikipedia <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Main_Page" title="Main Page">Main Page</a> in the <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Did_you_know" title="Template:Did you know">Did You Know?</a> column.</p> <p>Images that are used in Wikipedia that are <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Non-free_content" title="Wikipedia:Non-free content">non-free or fair use</a> should not appear as thumbnail images in categories. To prevent the thumbnail preview of images from appearing in a category, __NOGALLERY__ should be added to the text of the category. In such cases, the file will still appear in the category, but the actual image preview will not.</p> <p><span id="Non-article_and_maintenance_categories"></span><span id="Maintenance_categories"></span></p> <h3><span class="mw-headline" id="Wikipedia_administrative_categories">Wikipedia administrative categories</span></h3> <div style="position:relative;top:-3em"><span id="WP:PROJCATS"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:PROJCATS" title="Wikipedia:PROJCATS" class="mw-redirect">WP:PROJCATS</a></small></li> </ul> </th> </tr> </table> <p>A distinction is made between two types of category:</p> <ul> <li><b>Administrative categories</b>, intended for use by editors or by automated tools, based on features of the current state of articles, or used to categorize non-article pages.</li> <li><b>Content categories</b>, intended as part of the encyclopedia, to help readers find articles, based on features of the subjects of those articles;</li> </ul> <p>Administrative categories include <b>stub categories</b> (generally produced by <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Stub" title="Wikipedia:Stub">stub</a> templates), <b>maintenance categories</b> (often produced by tag templates such as {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Cleanup" title="Template:Cleanup">cleanup</a>}} and {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Fact" title="Template:Fact" class="mw-redirect">fact</a>}}, and used for <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Maintenance" title="Wikipedia:Maintenance">maintenance</a> projects), <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject" title="Wikipedia:WikiProject">WikiProject</a> and assessment categories, and categories of pages in non-article <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Namespace" title="Wikipedia:Namespace">namespaces</a>.</p> <p>Article pages should be kept out of administrative categories if possible. For example, the templates that generate WikiProject and assessment categories should be placed on talk pages, not on the articles themselves. If it is unavoidable that an administration category appears on article pages (usually because it is generated by a maintenance tag that is placed on articles), then in most cases it should be made a <b>hidden category</b>, as described under <a href="#Hiding_categories">Hiding categories</a> below.</p> <p>There are separate administrative categories for different kinds of non-article pages, such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Template" title="Wikipedia:Template" class="mw-redirect">template</a> categories, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Disambiguation" title="Wikipedia:Disambiguation">disambiguation page</a> categories, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Wikipedia_namespace" title="Wikipedia:Wikipedia namespace" class="mw-redirect">project page</a> categories etc.</p> <p><span id="User_namespace"></span><span id="Categorizing_user_pages"></span></p> <h3><span class="mw-headline" id="User_pages">User pages</span></h3> <div style="position:relative;top:-3em"><span id="WP:USERNOCAT"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:USERNOCAT" title="Wikipedia:USERNOCAT" class="mw-redirect">WP:USERNOCAT</a></small></li> </ul> </th> </tr> </table> <div class="hatnote">Further information: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:User_categories" title="Wikipedia:User categories">Wikipedia:User categories</a> and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:User_pages#Categories.2C_templates_that_add_categories.2C_and_redirects" title="Wikipedia:User pages">Wikipedia:User pages § Categories, templates that add categories, and redirects</a></div> <p><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:User_pages" title="Wikipedia:User pages">User pages</a> are not articles, and thus do not belong in content categories such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Living_people" title="Category:Living people">Living people</a> or <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Biologists" title="Category:Biologists">Biologists</a>. They can however be placed in <b>user categories</b> – subcategories of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedians" title="Category:Wikipedians">Category:Wikipedians</a>, such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedian_biologists" title="Category:Wikipedian biologists">Category:Wikipedian biologists</a> – which assist collaboration between users.</p> <p>Similarly, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:SP" title="Wikipedia:SP" class="mw-redirect">user subpages</a> that are draft versions of articles should be kept out of content categories, but are permitted in non-content or project categories, like <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:User_essays" title="Category:User essays">Category:User essays</a>. If you copy an article from mainspace to userspace and it already contains categories, remove them or <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Hidden_text" title="Help:Hidden text">comment them out</a>. Restore the categories when you move the draft back into article space.</p> <p>At <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Database_reports/Polluted_categories" title="Wikipedia:Database reports/Polluted categories">Database reports/Polluted categories</a>, a list of affected categories is maintained.</p> <h3><span class="mw-headline" id="Draft_pages">Draft pages</span></h3> <div style="position:relative;top:-3em"><span id="WP:DRAFTNOCAT"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:DRAFTNOCAT" title="Wikipedia:DRAFTNOCAT" class="mw-redirect">WP:DRAFTNOCAT</a></small></li> </ul> </th> </tr> </table> <div class="hatnote">Further information: <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Drafts#Preparing_drafts" title="Wikipedia:Drafts">Wikipedia:Drafts § Preparing drafts</a></div> <p>Pages in the <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Drafts" title="Wikipedia:Drafts">draft namespace</a> are not articles, and thus do not belong in content categories such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Living_people" title="Category:Living people">Living people</a> or <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Biologists" title="Category:Biologists">Biologists</a>. If you copy an article from mainspace to draftspace and it already contains categories, then disable them: edit each by inserting a colon character to <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:How_to_link_to_a_category" title="Wikipedia:How to link to a category" class="mw-redirect">link to its category</a> instead (e.g. change <code>[[Category:Biologists]]</code> to <code>[[:Category:Biologists]]</code>), or <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Hidden_text" title="Help:Hidden text">comment them out</a> (e.g., <code></code>), or insert "nowiki" tags (e.g., <code class="nowrap" style=""><nowiki>[[Category:Biologists]]</nowiki></code>). Re-enable the categories when you move the draft back into article space.</p> <h3><span class="mw-headline" id="Template_categorization">Template categorization</span></h3> <div style="position:relative;top:-3em"><span id="WP:CAT.23T"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:CAT#T" title="Wikipedia:CAT" class="mw-redirect">WP:CAT#T</a></small></li> </ul> </th> </tr> </table> <p><span id="T"></span></p> <p><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Template_namespace" title="Wikipedia:Template namespace">Templates</a> should be categorized according to kind of template, but not by template content. For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Carter_string_quartets" title="Template:Carter string quartets">Template:Carter string quartets</a> is categorized under <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:String_quartets_by_composer_templates" title="Category:String quartets by composer templates">Category:String quartets by composer templates</a>, which should be a subcategory of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Music_navigational_boxes" title="Category:Music navigational boxes">Category:Music navigational boxes</a> (kind) but <i>not</i> <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:String_quartets" title="Category:String quartets">Category:String quartets</a> (content).</p> <h3><span class="mw-headline" id="Categorization_using_templates">Categorization using templates</span></h3> <div style="position:relative;top:-3em"><span id="WP:TEMPLATECAT"></span><span id="WP:TCAT"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcuts</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:TEMPLATECAT" title="Wikipedia:TEMPLATECAT" class="mw-redirect">WP:TEMPLATECAT</a></small></li> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:TCAT" title="Wikipedia:TCAT" class="mw-redirect">WP:TCAT</a></small></li> </ul> </th> </tr> </table> <p>Many <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Template_messages" title="Wikipedia:Template messages">templates</a> include category declarations in their transcludable text, for the purpose of placing the pages containing those templates into specific categories. This technique is very commonly used for populating certain kinds of administration categories, including stub categories and maintenance categories.</p> <p>However, it is recommended that articles not be placed in ordinary <i>content</i> categories using templates in this way. There are many reasons for this: editors cannot see the category in the wikitext; removing or restructuring the category is made more difficult (partly because automated processes will not work); inappropriate articles and non-article pages may get added to the category; sort keys may be unavailable to be customised per category; ordering of categories on the page is less controllable; and the "incategory" <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Searching" title="Wikipedia:Searching" class="mw-redirect">search term</a> will not find such pages.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span>[</span>2<span>]</span></a></sup></p> <p>When templates are used to populate administration categories, ensure that the code cannot generate nonsensical or non-existent categories, particularly when the category name depends on a parameter. Also, see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Category_suppression" title="Wikipedia:Category suppression">Category suppression</a> for ways of keeping inappropriate pages out of template-generated categories.</p> <p>Category declarations in templates often use <code>{{PAGENAME}}</code> as the sort key, particularly if they are designed to be placed on talk pages, as this suppresses the <i>Talk:</i> prefix. Note that this overrides any DEFAULTSORT defined on the page.</p> <h4><span class="mw-headline" id="Hiding_categories">Hiding categories</span></h4> <div style="position:relative;top:-3em"><span id="WP:HIDDENCAT"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:HIDDENCAT" title="Wikipedia:HIDDENCAT" class="mw-redirect">WP:HIDDENCAT</a></small></li> </ul> </th> </tr> </table> <p>In cases where, for technical reasons, administration categories appear directly on articles rather than talk pages, they should be made into <b>hidden categories</b>, so that they are not displayed to readers. This rule does not apply to <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Stub" title="Wikipedia:Stub">stub</a> categories or "uncategorized article" categories – these types are <i>not</i> hidden.</p> <p>To hide a category, add the template <code>{{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Wikipedia_category" title="Template:Wikipedia category">Wikipedia category</a>|hidden=yes}}</code> to the category page (the template uses the <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Magic_word" title="Wikipedia:Magic word" class="mw-redirect">magic word</a> <code>__HIDDENCAT__</code>). This also places the page in <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Hidden_categories" title="Category:Hidden categories">Category:Hidden categories</a>.</p> <p>A logged-in user may elect to view all hidden categories, by checking "Show hidden categories" on the "Appearance" tab of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Special:Preferences" title="Special:Preferences">My Preferences</a>. Notice that "hidden" parent categories are never in fact hidden on category pages (although they are listed separately).</p> <h4><span class="mw-headline" id="Redirected_categories">Redirected categories</span></h4> <p>Do not create inter-category redirects. See <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categories_for_discussion#Redirecting_categories" title="Wikipedia:Categories for discussion">Wikipedia:Categories for discussion#Redirecting categories</a> for the policy, and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Redirect#Category_redirects" title="Wikipedia:Redirect">Wikipedia:Redirect#Category redirects</a> for the technical details.</p> <h2><span class="mw-headline" id="Sort_keys">Sort keys</span></h2> <div style="position:relative;top:-3em"><span id="WP:SORTKEY"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:SORTKEY" title="Wikipedia:SORTKEY" class="mw-redirect">WP:SORTKEY</a></small></li> </ul> </th> </tr> </table> <p><b>Sort keys</b> are sometimes needed to produce a correct ordering of member pages and subcategories on the category page. For the mechanics, see <b><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Category#Sort_order" title="Help:Category">Sort order</a></b> on the help page.</p> <p>Because the software uses an imperfect computer sorting rather than true alphabetical ordering (see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Category#Sort_order" title="Help:Category">details</a>), it is important that some sort keys be adjusted consistently. For example, non-English accented characters, such as "ź" with English counterparts, e.g. "z".</p> <p>Categories of people are usually sorted by last name rather than first name, so "surname, forename" sort keys are used (as in "Washington, George"). There are many other rules for sorting people's names; for more information, see <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:NAMESORT" title="Wikipedia:NAMESORT" class="mw-redirect">WP:NAMESORT</a>.</p> <p>Entries containing modified letters should be sorted as if the letters were unmodified (for example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/%C5%81%C3%B3d%C5%BA" title="Łódź">Łódź</a> has the sort key "Lodz").</p> <p>Other sort key considerations:</p> <ul> <li>Leading articles—a, an, and the—are one of the most common reasons for using sort keys, moving the article to the end of the key, as in {{DEFAULTSORT:Lady, The}}. Please also apply these sort keys to deliberate misspellings of these words—e.g. "da" or "tha" for "the", as well as foreign language articles, such as "el" or "der" (but beware of non-articles that have the same spelling, e.g. that translate as "at" or "one"). However, leading articles in foreign-language-derived names which are no longer translated in English are not subject to this rule; e.g. the sort key for <a href="/web/20150321225939/https://en.wikipedia.org/wiki/El_Paso" title="El Paso" class="mw-redirect">El Paso</a> should be {{DEFAULTSORT:El Paso}}.</li> <li>Spell out abbreviations and characters used in place of words so that they can be found easily in categories. E.g. the sort key for <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Mr._Bean" title="Mr. Bean">Mr. Bean</a> should be {{DEFAULTSORT:Mister Bean}} and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Dungeons_%26_Dragons" title="Dungeons & Dragons">Dungeons & Dragons</a> should be sorted {{DEFAULTSORT:Dungeons And Dragons}}. An exception is × as in Men's 4 × 100 metre relay. Use the letter x in this case.</li> <li>Only hyphens, apostrophes and periods/full stops punctuation marks should be kept in sort values. All other punctuation marks should be removed. The only exception is the apostrophe should be removed for names beginning with O'. For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Eugene_O%27Neill" title="Eugene O'Neill">Eugene O'Neill</a> is sorted {{DEFAULTSORT:ONeill, Eugene}}.</li> <li>Entries containing numbers sometimes need special sort keys to ensure numerical rather than alphabetical ordering (for example, 19 and 103 come before 2 in alphabetical order, and IX comes before V). So <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Haydn" title="Haydn" class="mw-redirect">Haydn</a>'s 13th symphony might have the sort key "Symphony 013", the zero ensuring that it is listed before symphonies 100–108; Pope John IX might have a sort key "John 09". It is important to stick to the same system for all similar entries in a given category.</li> <li>Systematic sort keys are also used in other categories where the logical sort order is not alphabetical (for example, individual month articles in year categories such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:2004" title="Category:2004">Category:2004</a> use sort keys like "*2004-04" for April). Again, such systems must be used consistently within a category.</li> <li>In some categories, sort keys are used to exclude prefixes that are common to all or many of the entries, or are considered unimportant (such as "List of" or "The"). For example, in <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:2004" title="Category:2004">Category:2004</a> the page <a href="/web/20150321225939/https://en.wikipedia.org/wiki/2004_in_film" title="2004 in film">2004 in film</a> would have the sort key "Film", and in <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:2004_in_Canada" title="Category:2004 in Canada">Category:2004 in Canada</a> the page <a href="/web/20150321225939/https://en.wikipedia.org/wiki/2004_Canadian_federal_budget" title="2004 Canadian federal budget">2004 Canadian federal budget</a> would have the sort key "Federal Budget".</li> <li>Use a space as the sort key for a <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Glossary#Key_article" title="Wikipedia:Glossary">key article</a> for the category. (Note: If the key article should not be a member, simply edit the category text itself to add it, perhaps using {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Cat_main" title="Template:Cat main">Cat main</a>}}.)</li> <li>Use other sort keys beginning with a space (or an asterisk or a plus sign) for any "List of ..." and other pages that should appear <i>after</i> the key article and <i>before</i> the main alphabetical listings. The same technique is sometimes used to bring particular subcategories to the start of the list.</li> <li>To place entries <i>after</i> the main alphabetical list, use sort keys beginning with tilde ("~"). Several <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Greek_alphabet" title="Greek alphabet">Greek letters</a> are also used for specific purposes. "Σ" (<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Sigma" title="Sigma">sigma</a>) is used to place <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Stub" title="Wikipedia:Stub">stub</a> categories at the end of subcategory lists ("µ" was previously used but the capital version "Μ" was confusing). "β" (<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Beta" title="Beta">beta</a>, displays as "Β") is for <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Books" title="Wikipedia:Books">Wikipedia books</a>. "ι" (<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Iota" title="Iota">iota</a>, displays as "Ι") is for <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Images" title="Wikipedia:Images">images</a>. "ρ" (<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Rho" title="Rho">rho</a>, displays as "Ρ") is for <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Portal" title="Wikipedia:Portal">portals</a>. "τ" (<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Tau" title="Tau">tau</a>, displays as "Τ") is for <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Template" title="Help:Template">templates</a>. "ω" (<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Omega" title="Omega">omega</a>, displays as "Ω") is for WikiProjects. Similar to the handling of Latin letters, if the sort key is a lower case Greek letter then the capital Greek letter will be displayed in headings on category pages. "β" will appear beneath "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/%CE%92" title="Β" class="mw-redirect">Β</a>"; "ι" beneath "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/%CE%99" title="Ι" class="mw-redirect">Ι</a>"; "ρ" beneath "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/%CE%A1" title="Ρ" class="mw-redirect">Ρ</a>"; "τ" beneath "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/%CE%A4" title="Τ" class="mw-redirect">Τ</a>"; "ω" beneath "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/%CE%A9" title="Ω" class="mw-redirect">Ω</a>"; etc. Several of these resemble Latin letters B, I, P etc., but will sort after Z.</li> <li>If a page is to be given the same sort key in all or several of its categories, the <code>{{DEFAULTSORT}}</code> <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Help:Magic_words" title="Help:Magic words">magic word</a> can be used. Per <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:FOOTERS" title="Wikipedia:FOOTERS" class="mw-redirect">WP:FOOTERS</a>, this is placed just before the list of category declarations. Default sort keys are sometimes defined even where they do not seem necessary—when they are the same as the page name, for example—in order to prevent other editors or automated tools from trying to infer a different default.</li> </ul> <h2><span class="mw-headline" id="Category_tree_organization">Category tree organization</span></h2> <div class="thumb tright"> <div class="thumbinner" style="width:302px;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/File:Category-diagram.png" class="image"><img alt="" src="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Category-diagram.png/300px-Category-diagram.png" width="300" height="152" class="thumbimage" srcset="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Category-diagram.png/450px-Category-diagram.png 1.5x, //web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Category-diagram.png/600px-Category-diagram.png 2x" data-file-width="1254" data-file-height="636"/></a> <div class="thumbcaption"> <div class="magnify"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/File:Category-diagram.png" class="internal" title="Enlarge"></a></div> Partial view of Wikipedia's category system. Arrows point from category to sub-category.</div> </div> </div> <p>Categories are organized as overlapping "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Tree_(graph_theory)" title="Tree (graph theory)">trees</a>", formed by creating links between inter-related categories (in mathematics or computer science this structure is called a <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Partially_ordered_set" title="Partially ordered set">partially ordered set</a>). Any category may contain (or "branch into") <b>subcategories</b>, and it is possible for a category to be a subcategory of more than one "parent" category. (A is said to be a <b>parent category</b> of B when B is a subcategory of A.) <sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span>[</span>3<span>]</span></a></sup></p> <p>There is one top-level category, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Contents" title="Category:Contents">Category:Contents</a>. All other categories are found below this. Hence every category apart from this top one must be a subcategory of at least one other category.</p> <p><span id="Topic_category"></span><span id="Topic_categories"></span><span id="Set_category"></span><span id="Set_categories"></span>There are two main kinds of category:</p> <ul> <li><b>Topic categories</b> are named after a topic (usually sharing a name with the Wikipedia article on that topic). For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:France" title="Category:France">Category:France</a> contains articles relating to the topic <a href="/web/20150321225939/https://en.wikipedia.org/wiki/France" title="France">France</a>.</li> <li><b>Set categories</b> are named after a class (usually in the plural). For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Cities_in_France" title="Category:Cities in France">Category:Cities in France</a> contains articles whose subjects are cities in France.</li> </ul> <p>Sometimes, for convenience, the two types can be combined, to create a <i>set-and-topic</i> category (such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Voivodeships_of_Poland" title="Category:Voivodeships of Poland">Category:Voivodeships of Poland</a>, which contains articles about particular voivodeships as well as articles relating to voivodeships in general).</p> <h3><span class="mw-headline" id="Subcategorization">Subcategorization</span></h3> <div style="position:relative;top:-3em"><span id="WP:SUBCAT"></span><span id="WP:SUPERCAT"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcuts</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:SUBCAT" title="Wikipedia:SUBCAT" class="mw-redirect">WP:SUBCAT</a></small></li> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:SUPERCAT" title="Wikipedia:SUPERCAT" class="mw-redirect">WP:SUPERCAT</a></small></li> </ul> </th> </tr> </table> <div class="thumb tright"> <div class="thumbinner" style="width:302px;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/File:Binary_tree_structure.svg" class="image"><img alt="" src="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Binary_tree_structure.svg/300px-Binary_tree_structure.svg.png" width="300" height="180" class="thumbimage" srcset="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Binary_tree_structure.svg/450px-Binary_tree_structure.svg.png 1.5x, //web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Binary_tree_structure.svg/600px-Binary_tree_structure.svg.png 2x" data-file-width="500" data-file-height="300"/></a> <div class="thumbcaption"> <div class="magnify"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/File:Binary_tree_structure.svg" class="internal" title="Enlarge"></a></div> A tree structure showing the possible hierarchical organization of an encyclopedia.</div> </div> </div> <div class="thumb tright"> <div class="thumbinner" style="width:222px;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/File:Tree_product_pract.svg" class="image"><img alt="" src="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/Tree_product_pract.svg/220px-Tree_product_pract.svg.png" width="220" height="59" class="thumbimage" srcset="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/Tree_product_pract.svg/330px-Tree_product_pract.svg.png 1.5x, //web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/Tree_product_pract.svg/440px-Tree_product_pract.svg.png 2x" data-file-width="600" data-file-height="160"/></a> <div class="thumbcaption"> <div class="magnify"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/File:Tree_product_pract.svg" class="internal" title="Enlarge"></a></div> Items may belong to more than one category, but normally not to a category and its parent (there are, however, exceptions to this rule, such as <a href="#Non-diffusing_subcategories">non-diffusing categories</a>). An item may belong to several subcategories of a parent category (as pictured).</div> </div> </div> <p>If logical membership of one category implies logical membership of a second, then the first category should be made a subcategory (directly or indirectly) of the second. For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Cities_in_France" title="Category:Cities in France">Cities in France</a> is a subcategory of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Populated_places_in_France" title="Category:Populated places in France">Populated places in France</a>, which in turn is a subcategory of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Geography_of_France" title="Category:Geography of France">Geography of France</a>.</p> <p>Many subcategories have two or more parent categories. For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:British_writers" title="Category:British writers">Category:British writers</a> should be in both <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Writers_by_nationality" title="Category:Writers by nationality">Category:Writers by nationality</a> and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:British_people_by_occupation" title="Category:British people by occupation">Category:British people by occupation</a>. When making one category a subcategory of another, ensure that the members of the subcategory really can be expected (with possibly a few exceptions<sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="what are these exceptions and where would one find a list and/or explanation of each (April 2014)">clarification needed</span></a></i>]</sup>) to belong to the parent also. Category chains formed by parent-child relationships should never form closed loops; that is, no category should be contained as a subcategory of one of its own subcategories. If two categories are closely related but are not in a subset relation, then links between them can be included in the text of the category pages.</p> <p>A page or category should rarely be placed in both a category and a subcategory or parent category (supercategory) of that category (unless the child category is non-diffusing – see below – or <a href="#Eponymous_categories">eponymous</a>). For example, the article "Paris" need only be placed in "Category:Cities in France", <i>not</i> in both "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Cities_in_France" title="Category:Cities in France">Category:Cities in France</a>" and "<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Populated_places_in_France" title="Category:Populated places in France">Category:Populated places in France</a>". Since the first category (cities) is in the second category (populated places), readers are already given the information that Paris is a populated place in France by it being a city in France.</p> <p>Note also that as stub templates are for maintenance purposes, not user browsing (see <a href="#Wikipedia_administrative_categories">#Wikipedia administrative categories</a> above), they do <i>not</i> count as categorization for the purposes of Wikipedia's categorization policies. An article which has a "stubs" category on it <i>must</i> still be filed in the most appropriate content categories, even if one of them is a direct parent of the stubs category in question.</p> <h4><span class="mw-headline" id="Diffusing_large_categories">Diffusing large categories</span></h4> <div style="position:relative;top:-3em"><span id="WP:DIFFUSE"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:DIFFUSE" title="Wikipedia:DIFFUSE" class="mw-redirect">WP:DIFFUSE</a></small></li> </ul> </th> </tr> </table> <p>Although there is no limit on the size of categories, a large category will often be broken down ("diffused") into smaller, more specific subcategories. For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Rivers_of_Europe" title="Category:Rivers of Europe">Category:Rivers of Europe</a> is broken down by country into the subcategories <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Rivers_of_Albania" title="Category:Rivers of Albania">Rivers of Albania</a>, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Rivers_of_Andorra" title="Category:Rivers of Andorra">Rivers of Andorra</a>, etc.</p> <p>A category may be diffused using several coexisting schemes; for example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Albums" title="Category:Albums">Category:Albums</a> is broken down by artist, by date, by genre etc. <b>Metacategories</b> may be created as ways of organizing schemes of subcategories. For example, the subcategories called "<i>Artistname</i> albums" are not placed directly into <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Albums" title="Category:Albums">Category:Albums</a>, but into the metacategory <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Albums_by_artist" title="Category:Albums by artist">Category:Albums by artist</a>, which itself appears in Category:Albums.</p> <p>It is possible for a category to be only partially diffused – some members are placed in subcategories, while others remain in the main category.</p> <p>Information about how a category is diffused may be given on the category page. Categories which are intended to be fully broken down into subcategories can be marked with the {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Catdiffuse" title="Template:Catdiffuse" class="mw-redirect">catdiffuse</a>}} template, which indicates that any pages which editors might add to the main category should be moved to the appropriate subcategories when sufficient information is available. (If the proper subcategory for an article does not exist yet, either create the subcategory or leave the article in the parent category for the time being.)</p> <p>To suggest that a category is so large that it ought to be diffused into subcategories, you can add the {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Verylarge" title="Template:Verylarge" class="mw-redirect">verylarge</a>}} template to the category page.</p> <h4><span class="mw-headline" id="Non-diffusing_subcategories">Non-diffusing subcategories</span></h4> <div style="position:relative;top:-3em"><span id="WP:DUPCAT"></span></div> <table class="shortcutbox noprint" style="float:right;border:1px solid #aaa;background:#fff;margin:.3em .3em .3em 1em;padding:3px;text-align:center"> <tr> <th class="plainlist" style="border:none;background:transparent"><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcut</a>:</small> <ul> <li><small><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:DUPCAT" title="Wikipedia:DUPCAT" class="mw-redirect">WP:DUPCAT</a></small></li> </ul> </th> </tr> </table> <p>Not all subcategories serve the "diffusion" function described above; some are simply subsets which have some special characteristic of interest, such as <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Best_Actor_Academy_Award_winners" title="Category:Best Actor Academy Award winners">Best Actor Academy Award winners</a> as a subcategory of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Film_actors" title="Category:Film actors">Film actors</a>, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Toll_bridges_in_New_York_City" title="Category:Toll bridges in New York City">Toll bridges in New York City</a> as a subcategory of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Bridges_in_New_York_City" title="Category:Bridges in New York City">Bridges in New York City</a>, and <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Musical_films" title="Category:Musical films">Musical films</a> as a subcategory of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Musicals" title="Category:Musicals">Musicals</a>. These are called <b>non-diffusing subcategories</b>. They provide an exception to the general rule that pages are not placed in both a category and its subcategory: there is no need to take pages out of the parent category <i>purely</i> because of their membership of a non-diffusing subcategory. (Of course, if the pages also belong to other subcategories that do cause diffusion, then they will not appear in the parent category directly.)</p> <p>Non-diffusing subcategories should be identified with a template on the category page.</p> <ul> <li>The {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Non-diffusing_subcategory" title="Template:Non-diffusing subcategory">Non-diffusing subcategory</a>}} templates should be used for sub-categories that are non-diffusing, like <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:American_novelists_of_Asian_descent" title="Category:American novelists of Asian descent">Category:American novelists of Asian descent</a>.</li> <li>The {{<a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:All_included" title="Template:All included">All included</a>}} can be used for categories where all child articles of a certain type are in the parent, like <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Presidents_of_the_United_States" title="Category:Presidents of the United States">Category:Presidents of the United States</a> or <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Western_Europe" title="Category:Western Europe">Category:Western Europe</a>.</li> </ul> <p>Subcategories defined by gender, ethnicity, religion, and sexuality should almost always be non-diffusing subcategories. The <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categorization/Ethnicity,_gender,_religion_and_sexuality" title="Wikipedia:Categorization/Ethnicity, gender, religion and sexuality">Wikipedia:Categorization/Ethnicity, gender, religion and sexuality</a> categorization guideline outlines the rules on these categories in more detail. Note that some categories can be non-diffusing on some parents, and diffusing on others. For example, <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:British_women_novelists" title="Category:British women novelists">Category:British women novelists</a> is a non-diffusing sub-category of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:British_novelists" title="Category:British novelists">Category:British novelists</a>, but it is a diffusing subcategory of <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Women_novelists_by_nationality" title="Category:Women novelists by nationality">Category:Women novelists by nationality</a>.</p> <h2><span class="mw-headline" id="See_also">See also</span></h2> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Category_suppression" title="Wikipedia:Category suppression">Wikipedia:Category suppression</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Categories" title="Wikipedia:WikiProject Categories">Wikipedia:WikiProject Categories</a></li> <li><a href="//web.archive.org/web/20150321225939/https://meta.wikimedia.org/wiki/Association_of_Categorist_Wikipedians" class="extiw" title="m:Association of Categorist Wikipedians">m:Association of Categorist Wikipedians</a></li> <li><a href="//web.archive.org/web/20150321225939/https://meta.wikimedia.org/wiki/Help:Sorting" class="extiw" title="m:Help:Sorting">m:Help:Sorting</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_essays_about_categorization" title="Category:Wikipedia essays about categorization">Category:Wikipedia essays about categorization</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:FAQ/Categorization" title="Wikipedia:FAQ/Categorization">Wikipedia:FAQ/Categorization</a></li> </ul> <h3><span class="mw-headline" id="For_browsing">For browsing</span></h3> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:CatScan" title="Wikipedia:CatScan">Wikipedia:CatScan</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Classification" title="Wikipedia:Classification">Wikipedia:Classification</a> (category tree jumping)</li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Category_intersection" title="Wikipedia:Category intersection">Wikipedia:Category intersection</a> (ability to find articles that are in more than one category)</li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Special:Categories" title="Special:Categories">Special:Categories</a> (lists all existing categories alphabetically)</li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Special:CategoryTree" title="Special:CategoryTree">Special:CategoryTree</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_categories" title="Category:Wikipedia categories">Category:Wikipedia categories</a></li> </ul> <h3><span class="mw-headline" id="For_maintenance">For maintenance</span></h3> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Special:MostLinkedCategories" title="Special:MostLinkedCategories">Special:Mostlinkedcategories</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Special:UncategorizedFiles" title="Special:UncategorizedFiles">Special:Uncategorizedimages</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Special:UncategorizedPages" title="Special:UncategorizedPages">Special:Uncategorizedpages</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Special:UnusedCategories" title="Special:UnusedCategories">Special:Unusedcategories</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Special:WantedCategories" title="Special:WantedCategories">Special:Wantedcategories</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Database_reports#Categories" title="Wikipedia:Database reports">Wikipedia:Database reports#Categories</a></li> </ul> <h2><span class="mw-headline" id="Notes">Notes</span></h2> <div class="reflist" style="list-style-type: decimal;"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text">in prose, as opposed to a tabular or list form</span></li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><a href="https://web.archive.org/web/20150321225939/https://bugzilla.wikimedia.org/show_bug.cgi?id=2285" class="extiw" title="bugzilla:2285">bugzilla:2285</a></span></li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">Mathematically speaking, this means that the system approximates a <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Directed_acyclic_graph" title="Directed acyclic graph">directed acyclic graph</a>.</span></li> </ol> </div> <table class="navbox" style="border-spacing:0"> <tr> <td style="padding:2px"> <table class="nowraplinks hlist collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"> <tr> <th scope="col" class="navbox-title" colspan="2" style="text-align: center;"> <div class="plainlinks hlist navbar mini"> <ul> <li class="nv-view"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template:Wikipedia_policies_and_guidelines" title="Template:Wikipedia policies and guidelines"><span title="View this template" style="text-align: center;;;background:none transparent;border:none;">v</span></a></li> <li class="nv-talk"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Template_talk:Wikipedia_policies_and_guidelines" title="Template talk:Wikipedia policies and guidelines"><span title="Discuss this template" style="text-align: center;;;background:none transparent;border:none;">t</span></a></li> <li class="nv-edit"><a class="external text" href="//web.archive.org/web/20150321225939/https://en.wikipedia.org/w/index.php?title=Template:Wikipedia_policies_and_guidelines&action=edit"><span title="Edit this template" style="text-align: center;;;background:none transparent;border:none;">e</span></a></li> </ul> </div> <div style="font-size:110%"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Policies_and_guidelines" title="Wikipedia:Policies and guidelines">Wikipedia key policies and guidelines</a></div> </th> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_administration" title="Category:Wikipedia administration">Overview</a></th> <td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Five_pillars" title="Wikipedia:Five pillars">Five pillars</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Policies_and_guidelines" title="Wikipedia:Policies and guidelines">Policies and guidelines</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_policies_and_guidelines" title="Wikipedia:List of policies and guidelines">List of policies and guidelines</a> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_policies" title="Wikipedia:List of policies">List of policies</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines" title="Wikipedia:List of guidelines">List of guidelines</a></li> </ul> </li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Principles" title="Wikipedia:Principles">Project-wide principles</a></th> <td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Consensus" title="Wikipedia:Consensus">Consensus</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Dispute_resolution" title="Wikipedia:Dispute resolution">Dispute resolution</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Editing_policy" title="Wikipedia:Editing policy">Editing policy</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Ignore_all_rules" title="Wikipedia:Ignore all rules">Ignore all rules</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:What_Wikipedia_is_not" title="Wikipedia:What Wikipedia is not">What Wikipedia is not</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Core_content_policies" title="Wikipedia:Core content policies">Core content policies</a></th> <td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Neutral_point_of_view" title="Wikipedia:Neutral point of view">Neutral point of view</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:No_original_research" title="Wikipedia:No original research">No original research</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">Verifiability</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;">Other <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Content_policies" title="Wikipedia:Content policies" class="mw-redirect">content policies</a></th> <td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Article_titles" title="Wikipedia:Article titles">Article titles</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Biographies_of_living_persons" title="Wikipedia:Biographies of living persons">Biographies of living persons</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Image_use_policy" title="Wikipedia:Image use policy">Image use</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Content" title="Wikipedia:List of guidelines">Content guidelines</a></th> <td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources">Citing sources</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Disambiguation" title="Wikipedia:Disambiguation">Disambiguation</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Do_not_create_hoaxes" title="Wikipedia:Do not create hoaxes">Do not create hoaxes</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Do_not_include_the_full_text_of_lengthy_primary_sources" title="Wikipedia:Do not include the full text of lengthy primary sources">Do not include copies of primary sources</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Fringe_theories" title="Wikipedia:Fringe theories">Treatment of fringe theories</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sources" title="Wikipedia:Identifying reliable sources">Identifying reliable sources</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Notability" title="Wikipedia:Notability">Notability</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Patent_nonsense" title="Wikipedia:Patent nonsense">Patent nonsense</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Behavioral_policies" title="Wikipedia:Behavioral policies" class="mw-redirect">Behavioural policies</a></th> <td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Child_protection" title="Wikipedia:Child protection">Child protection</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Civility" title="Wikipedia:Civility">Civility</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Courtesy_vanishing" title="Wikipedia:Courtesy vanishing">Courtesy vanishing</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Edit_warring" title="Wikipedia:Edit warring">Edit warring</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Harassment" title="Wikipedia:Harassment">Harassment</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:No_legal_threats" title="Wikipedia:No legal threats">No legal threats</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:No_personal_attacks" title="Wikipedia:No personal attacks">No personal attacks</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Ownership_of_articles" title="Wikipedia:Ownership of articles">Ownership of articles</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Sock_puppetry" title="Wikipedia:Sock puppetry">Sock puppetry</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Behavioral" title="Wikipedia:List of guidelines">Behavioural guidelines</a></th> <td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Assume_good_faith" title="Wikipedia:Assume good faith">Assume good faith</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Conflict_of_interest" title="Wikipedia:Conflict of interest">Conflict of interest</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Disruptive_editing" title="Wikipedia:Disruptive editing">Disruptive editing</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Do_not_disrupt_Wikipedia_to_illustrate_a_point" title="Wikipedia:Do not disrupt Wikipedia to illustrate a point">Do not disrupt Wikipedia to illustrate a point</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Etiquette" title="Wikipedia:Etiquette">Etiquette</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Gaming_the_system" title="Wikipedia:Gaming the system">Gaming the system</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Please_do_not_bite_the_newcomers" title="Wikipedia:Please do not bite the newcomers">Please do not bite the newcomers</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Editing" title="Wikipedia:List of guidelines">Editing guidelines</a></th> <td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Article_size" title="Wikipedia:Article size">Article size</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Be_bold" title="Wikipedia:Be bold">Be bold</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Hatnote" title="Wikipedia:Hatnote">Hatnotes</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">Signatures</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Subpages" title="Wikipedia:Subpages">Subpages</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Talk_page_guidelines" title="Wikipedia:Talk page guidelines">Talk page guidelines</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:User_pages" title="Wikipedia:User pages">User pages</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Vandalism" title="Wikipedia:Vandalism">Vandalism</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Council/Guide" title="Wikipedia:WikiProject Council/Guide">WikiProjects</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_guidelines#Style" title="Wikipedia:List of guidelines">Style conventions</a></th> <td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style" title="Wikipedia:Manual of Style">Manual of Style</a> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Contents" title="Wikipedia:Manual of Style/Contents">Contents</a></li> </ul> </li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Accessibility" title="Wikipedia:Manual of Style/Accessibility">Accessibility</a> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Make_technical_articles_understandable" title="Wikipedia:Make technical articles understandable">Understandability</a></li> </ul> </li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Dates_and_numbers" title="Wikipedia:Manual of Style/Dates and numbers">Dates and numbers</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Images" title="Wikipedia:Manual of Style/Images">Images</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Layout" title="Wikipedia:Manual of Style/Layout">Layout</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Lead_section" title="Wikipedia:Manual of Style/Lead section">Lead section</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Linking" title="Wikipedia:Manual of Style/Linking">Linking</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Lists" title="Wikipedia:Manual of Style/Lists">Lists</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_categories" title="Category:Wikipedia categories">Classification guidelines</a></th> <td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Categories,_lists,_and_navigation_templates" title="Wikipedia:Categories, lists, and navigation templates">Categories, lists, and navigation templates</a></li> <li><strong class="selflink">Categorization</strong></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Template_namespace" title="Wikipedia:Template namespace">Template namespace</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:List_of_policies#Deletion" title="Wikipedia:List of policies">Deletion policies</a></th> <td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Attack_page" title="Wikipedia:Attack page">Attack page</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Criteria_for_speedy_deletion" title="Wikipedia:Criteria for speedy deletion">Criteria for speedy deletion</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Deletion_policy" title="Wikipedia:Deletion policy">Deletion policy</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Oversight" title="Wikipedia:Oversight">Oversight</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Proposed_deletion" title="Wikipedia:Proposed deletion">Proposed deletion</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Proposed_deletion_(BLP)" title="Wikipedia:Proposed deletion (BLP)" class="mw-redirect">Proposed deletion (BLP)</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Proposed_deletion_(books)" title="Wikipedia:Proposed deletion (books)">Proposed deletion (books)</a></li> <li><a href="/web/20150321225939/https://en.wikipedia.org/wiki/Wikipedia:Revision_deletion" title="Wikipedia:Revision deletion">Revision deletion</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <th scope="row" class="navbox-group" style="text-align: center;"><a href="//web.archive.org/web/20150321225939/https://wikimediafoundation.org/wiki/FAQ/en" class="extiw" title="wmf:FAQ/en">Wikimedia Foundation</a></th> <td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"> <div style="padding:0em 0.25em"> <ul> <li><a href="//web.archive.org/web/20150321225939/https://wikimediafoundation.org/wiki/Policies" class="extiw" title="wikimedia:Policies">List of policies</a></li> <li><a href="//web.archive.org/web/20150321225939/https://wikimediafoundation.org/wiki/Resolution:Licensing_policy" class="extiw" title="wikimedia:Resolution:Licensing policy">Licensing and copyright</a></li> <li><a href="//web.archive.org/web/20150321225939/https://wikimediafoundation.org/wiki/Privacy_policy" class="extiw" title="wikimedia:Privacy policy">Privacy policy</a></li> <li><a href="//web.archive.org/web/20150321225939/https://wikimediafoundation.org/wiki/Values" class="extiw" title="wmf:Values">Values</a></li> </ul> </div> </td> </tr> <tr style="height:2px"> <td colspan="2"></td> </tr> <tr> <td class="navbox-abovebelow" colspan="2" style="text-align: center;;font-weight: bold;"> <div> <ul> <li><img alt="Wikipedia book" src="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Symbol_book_class2.svg/16px-Symbol_book_class2.svg.png" title="Wikipedia book" width="16" height="16" srcset="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Symbol_book_class2.svg/23px-Symbol_book_class2.svg.png 1.5x, //web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Symbol_book_class2.svg/31px-Symbol_book_class2.svg.png 2x" data-file-width="180" data-file-height="185"/> <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Book:Key_Wikipedia_Policies_%26_Guidelines" title="Book:Key Wikipedia Policies & Guidelines">Book</a></li> <li><img alt="Category" src="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/en/thumb/4/48/Folder_Hexagonal_Icon.svg/16px-Folder_Hexagonal_Icon.svg.png" title="Category" width="16" height="14" srcset="//web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/en/thumb/4/48/Folder_Hexagonal_Icon.svg/24px-Folder_Hexagonal_Icon.svg.png 1.5x, //web.archive.org/web/20150321225939im_/https://upload.wikimedia.org/wikipedia/en/thumb/4/48/Folder_Hexagonal_Icon.svg/32px-Folder_Hexagonal_Icon.svg.png 2x" data-file-width="36" data-file-height="31"/> <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_policies" title="Category:Wikipedia policies">Category: Policies</a> / <a href="/web/20150321225939/https://en.wikipedia.org/wiki/Category:Wikipedia_guidelines" title="Category:Wikipedia guidelines">Guidelines</a></li> </ul> </div> </td> </tr> </table> </td> </tr> </table>    <noscript><img src="//web.archive.org/web/20150321225939im_/https://en.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" title="" width="1" height="1" style="border: none; position: absolute;"/></noscript></div> <div class="printfooter"> Retrieved from "<a dir="ltr" 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class="interlanguage-link interwiki-he"><a href="//web.archive.org/web/20150321225939/https://he.wikipedia.org/wiki/%D7%95%D7%99%D7%A7%D7%99%D7%A4%D7%93%D7%99%D7%94:%D7%A7%D7%98%D7%92%D7%95%D7%A8%D7%99%D7%94" title="ויקיפדיה:קטגוריה – Hebrew" lang="he" hreflang="he">עברית</a></li> <li class="interlanguage-link interwiki-ka"><a href="//web.archive.org/web/20150321225939/https://ka.wikipedia.org/wiki/%E1%83%95%E1%83%98%E1%83%99%E1%83%98%E1%83%9E%E1%83%94%E1%83%93%E1%83%98%E1%83%90:%E1%83%99%E1%83%90%E1%83%A2%E1%83%94%E1%83%92%E1%83%9D%E1%83%A0%E1%83%98%E1%83%96%E1%83%90%E1%83%AA%E1%83%98%E1%83%90" title="ვიკიპედია:კატეგორიზაცია – Georgian" lang="ka" hreflang="ka">ქართული</a></li> <li class="interlanguage-link interwiki-kw"><a href="//web.archive.org/web/20150321225939/https://kw.wikipedia.org/wiki/Wikipedia:Klassys" title="Wikipedia:Klassys – Cornish" lang="kw" hreflang="kw">Kernowek</a></li> <li class="interlanguage-link interwiki-ku"><a 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