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CategoriesUnfurled

Categories seen at the top of the page, including a view of the drop-down when you click on "more"

A category is a navigational tool used in MediaWiki to group similar pages together and structure the wiki, making it easier to explore and use. They can be used to group not only articles, but also templates, images, and even users.

Categories can be found in the article header and at the bottom of the page.

Why are categories important?

Categories are the basic tool for structuring wikis: They help organize the content, navigate the pages, and find related content. Ideally, every wiki page should be in at least one category.

Categories themselves can be categorized within other categories, allowing you to create a category tree of interlinked categories that make exploring the wiki much easier.

For example: A reader browses through a TV series wiki and opens a page on Jessica Protagonist. She is categorized as one of the Main characters. The reader can open that category and then move up to the higher level Characters category to explore Minor characters or Characters by season. The Characters category acts as the trunk of the category tree from which other categories branch off. Without the category, the reader would have to know the specific name of a character to find an article about them.

There is another reason for using categories: Categorization is essential for several core features of Fandom wikis, including:

  • The mobile main page, which uses categories as building blocks.
  • DynamicPageList, which generates lists based on categories.
  • The "Related Pages" module, which displays pages based on their categories.
  • Many bot usages.

Without categories, they simply won't work.

How to add a category?

To add a category, begin by going to the page you wish to categorize. Then use either the category module at the bottom of the page, or an editor, to add your category.

Using the category module

CategorySelect suggest

Adding a category via the category module. Note how existing categories are suggested to you.

The category module, if enabled, allows you to add categories without opening the editor. Simply scroll down to the bottom of a page and:

  • Click on the Add category button, and start typing in a category name.
  • You can use an already-established category (suggestions will appear as you type) or add a new one.
  • Once you are done, hit save and the category will appear on the article.

If you don't use the module, you can disable it through the preferences page. Just click on the Editing tab, check the box next to Disable Category module and then save your preferences.

While editing

There are various ways to add categories while editing the wiki, depending on which editor you use.

UCP editor

UCP editor categorization

The UCP editor interface.

The new Unified Community Platform editor allows for switching between Source Editing and Visual Editing.

  • In Source Editing mode, you simply add the category link to the article: [[Category:Help]] will add a page to the Help category.
  • In Visual Editing mode, you can click on the Categories button in the drop-down menu on the right. This opens the category dialogue, which allows you to edit categories, add new ones, and optionally customize how the article should be sorted.

To commit changes, simply save the page.

Legacy VisualEditor

VECatLocation

In VisualEditor, first find the dropdown menu in the upper right

VECatSuggest

In the VisualEditor, these are some of the categories that are suggested on a page about Rey from Star Wars.

In the legacy VisualEditor:

  • Click on the dropdown menu to the left of the Cancel button, scroll down, and click on Categories.
  • In the dialogue box, enter a category into the top field. Existing categories will show up as you type in more letters and can be selected by clicking on them.
  • To change how the page is sorted in a category, use the second field. By default, the page is listed exactly as its name is written, but you might want to sort them in a different manner.
For example, Charlie Brown can be sorted as Brown, Charlie by using that second box.
  • When finished, click on Apply changes and Save page to complete the categorization.


Legacy rich-text editor

Adding category edit mode

Adding, removing or editing a category from the editor

On the right hand side of the editor is a Categories module. Click to expand this and you will see a list of the categories already present.

  • To add a category, type the category name in the input area above the existing categories. As you type, you will see suggestions appear.
  • Click on the pencil next to each category to edit that category's settings.
  • Click on the trash can to remove the category.

Legacy source editor

While in source, you can add the category name as a link to the bottom of the page itself (e.g. [[Category:Help]]), or use the category module in the right rail.

By default, existing categories appear in the category module in the right rail. However, if you choose to disable the category module in your preferences, they do appear at the very bottom of the page.

How to sort articles in categories?

  • When clicking the edit icon next to category names, you can define a "sortkey" for that category. This sortkey defines at what point the article appears in a category page's listings, e.g., sort a first last name page under last name.
For example, you can use [[Category:Help]] to add a page to the Help category. To customize the sorting, you can use [[Category:Help|Custom name]] or [[Category:Help| ]] to force the article to display at the top of the page.
  • If an article example is the introduction for category example, a blank (space) or * (asterisk) sortkey puts it near the beginning of the category.
  • If the article is in many categories, you can add {{DEFAULTSORT:<sort key>}} in the article while editing in source mode to sort the article in all the categories the same way. This will save you from having to edit each category's parameters individually.

How to use category pages?

Categorical Pseudo-existence

When pages are in a category that hasn't been fully created

As soon as you add a category to a page, that category will appear in Special:Categories. You can reach the category page by clicking on the category link, or by entering the address into your browser.

However, the category page still needs to be created in order to be a part of the category tree , be available for selection on the Mobile Main Page, and be suggested when editing.

To do this, you need to create the category page.

Creating a category page

You can either create categories in advance, by starting a new page under the desired category name (Category:Target name) in any of our editors, or by adding the category to a page and then clicking on the category link or using Special:WantedCategories.

Category pages are created like any other page on a wiki and categorized in the same fashion.

For example, if your wiki is about the Marvel Universe,and you're starting a category about female heroes in the Marvel Cinematic Universe (aka Earth-199999), you can create the category Female superheroes (Earth-199999) in this manner:
Female superheroes of Earth-199999 came from every part of that Earth, exhibiting a wide range of powers, both meta—human and mortal. This category collects pages on this wiki about them, as well as many images and videos featuring their exploits. [[Category:Earth-19999]]

Once published, the category will appear under Earth-19999 and become available in the category module, all bots, DynamicPageList, the Help:Mobile Main Page, and other features.

Note that a category description isn't essential. However, a brief summary will always benefit your wiki's SEO, as it will be displayed in search results.

Deleting a category

Categories can be deleted like any other page , from the Edit menu drop-down panel. However, keep in mind that deleting a page does not remove it from pages contained within it. You have to delete them manually, either before or after deleting the category.

As long as a single page remains in the category, it will be listed on Special:WantedCategories.

What's the category page layout?

There are several ways a category can be displayed. Anonymous or logged-out users will only be shown the dynamic, default category layout, while registered users can switch between them and select a default one.

You can change your preferred layout through the preferences page:

  • Open the My Info tab.
  • Scroll down to the Appearance section.
  • Use the drop-down next to Category page layout to select your preferred layout.
  • Save your preference changes.

You can also switch between layout options by using the layout buttons in the top-right corner of the page.

Note that the category display options do not affect the contents of the category page itself, they only affect how pages listed in the category are depicted. The category's contents (description, images, etc.) will always display first.

Dynamic categories

This is the default layout for anonymous and logged-out users.

The first section is an image gallery similar to the one used by the classic categories layout. Although similar in layout, the galleries may feature different pages due to a difference in selection criteria. The gallery for dynamic categories cannot be disabled.

The second section contains a count of the total number of list items and a list of up to 200 items. The list contains both subcategories and pages sorted alphabetically by sortkey. The list is organized into two columns and, where possible, each item contains an image from its respective page. Above the list is a series of links that allow the viewer to skip to a specific letter in the alphabet. Below the list, next and previous buttons are displayed.

Classic categories

The first section is an image gallery featuring up to eight of the most popular pages from the category. The images are arranged in rows with as many as four images per row. Each image serves as a link to its respective page.

The second section is a list of subcategories and the third section is a list of pages. The layout of the lists are similar to each other. If a list has no items to display, its section is not displayed. The sections contains a count of the total number of list items and a list of up to 200 items.

If there are more than 200 items in the list, links to view the next/previous items will be placed both above and below the list. The list is organized into as many as three columns and sorted alphabetically by sortkey. If the CategoryTree extension is enabled (it should be by default), the subcategory list will display each item as a category tree instead of a link to the category page.

Category gallery

By default, all categories on Fandom have a Category Gallery at the top of the category page itself. This shows a small image and link for each of the 8 most popular pages in that category. The image shown is usually the first image on each page.

  • If a page has no suitable graphics, then the first few lines of text will appear. Suitable images must be:
    • Larger than 130px by 115px
    • Used ten or fewer times on the wiki in content namespaces
    • Not an SVG
  • If you have a community where this display does not work well, you can add the expression __NOCATEGORYGALLERY__ to the top of the page to remove it. You can also request that it be disabled on all pages through Special:Contact.

Category exhibition

CatExhibitionSample

A category with Category Exhibition enabled.

Category Exhibition is an optional display method for category pages. It can be turned on in your account preferences.

  • In the exhibition image mode, every page in the category is displayed as an image with a link. Images can be displayed in alphabetical or most visited order.
  • A small toggle option on the upper right of the page allows users to choose a "list" (lines) or image (squares) view.
  • In list mode, the category gallery appears above an alphabetical listing of all pages in the category.

Further reading

Further help and feedback

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