Help:Categories: Difference between revisions

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{{Short description|Collections of pages}}

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{{forFor|more extensive information for editors|HelpWikipedia:CategoryFAQ/Categories}}

{{For|information for [[Wikipedia:Wikipedians|editors]] on how to categorize a page|Help:Category|Wikipedia:Categorization}}

{{Information page|H:CATS}}

{{Reader help}}

'''Categories''' are used in Wikipedia to link articles under a common topic and are found at the bottom of the article page. Clicking the category name displays a list of articles in that category, asbelow wella aslist anyof sub-categories (''categories'' in that category) (if any). Categories allow readers to navigate through Wikipedia and find related articles.

Categories are not displayed in the [[Help:Mobile access|mobile version]] ([[phab:T24660]]). Mobile users can click "Desktop" at the bottom of a page to see the desktop version with categories. Registered users can enable [[:mw:Reading/Web/Advanced mobile contributions|Advanced mode]] which includes a "Categories" button.

[[File:Chicken Eyeglasses categories.png|center|thumb|900x900px|The bottom of the Wikipedia article [[Chicken eyeglasses]]. At the very bottom of the page, below the References, navigation templates and external links are a series of links. These links are the categories used on the page, which include: [[:Category:Animal welfare]], [[:Category:Animal equipment]], [[:Category:Eyewear]], and [[:Category:Poultry farming]]. By clicking on the category link at the bottom of the page, readers can navigate the Category tree (see below).]]

==Category tree==

All of the categories form a hierarchy, although sub-categories may be a member of more than one category. An example of a small part of this hierarchical structure islooks shownsomewhat like this:

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{| align = "center"

|-

| rowspan=3| [[:Category:History]]

| rowspan=3| → [[:Category:History by ___location]]

| rowspan=3| → [[:Category:History by country]]

|-

| → [[:Category:History of Australia]]

| → [[:Category:History of New South Wales]]

|-

| → [[:Category:History of the United States]]

| → [[:Category:History of California]]

|-

|

[[:Category:Main topic classifications]]

|

↓

|

| → [[:Category:History of Zambia]]

↓

| rowspan=3| → [[:Category:History by ___location]]

↓

| rowspan=3| [[:Category:History by country]]

↓

| rowspan=3| → [[:Category:History byof countryAustralia]]

↓

| → [[:Category:History of Australia by ___location]]

↓

| → [[:Category:History of NewAustralia by state Southor Walesterritory]]

↓

New South Wales, Queensland, etc.

|}

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The actual relationship is more complex since a category may appear as a subcategory of several other categories. The actual relationship of part of the category structure looks like this:

[[File:Category-diagram.png|border|400px|center]]

The uppermost category in the hierarchy is [[:Category:Contents]]. From here all other categories branch out, including those that are used for the maintenance of Wikipedia.

If an entry in a category is shown in ''italics'' it is a redirect to an article of a different name or a section of an article that contains information about that particular subject.

{{-Clear}}

The uppermost category in the hierarchy is [[:Category:Contents]]. From here all other categories branch out, including those that are used for the maintenance of Wikipedia.

If an entry in a category is shown in ''italics'' it is a redirect to an article of a different name that contains information about that particular subject.

{{-}}

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{{Wikipedia categorization navbox}}

[[Category:Reader help]]

[[Category:Wikipedia categorization|*]]