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Difference between revisions of "Help:Categories"

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m (templates require '|' instead of ':')
(I want to be able to find the list of categories quickly, and I think I'm probably not the only one. But I'm still very new at this, so please revert if this seems an unhelpful edit.)
 
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You can categorize pages and files by adding one or more '''Category''' {{#ifeq:Category|{{ns:category}}||'''({{ns:category}})'''}} tags to the content text. These tags create links at the bottom of the page that take you to the list of all pages in that category, which makes it easy to browse related articles.
 
You can categorize pages and files by adding one or more '''Category''' {{#ifeq:Category|{{ns:category}}||'''({{ns:category}})'''}} tags to the content text. These tags create links at the bottom of the page that take you to the list of all pages in that category, which makes it easy to browse related articles.
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== Basics ==
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* To add a page to a category manually:
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** If the category relates to '''a specific version of DF''' (for example, [[:Category:40d:Animals]]), add <code>{<nowiki/>{Category|''Category Name''}}</code> to the end of the article.
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** If the category relates to '''DF in general''', or unlikely to change in other versions (for example, [[:Category:Disambiguation]]), add <code>[<nowiki/>[Category:''Category Name'']]</code> to the end of the article.
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:Note that many categories are automatically included with templates; the list of an article's categories is displayed at the bottom of the page. You only need to add categories manually if they don't appear in the ''generated'' page, even though they may not appear in the page's source.
  
 
== Summary ==
 
== Summary ==
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Individual wikis may have their own top-level categories, such as [[wikipedia:Category:Contents|Category:Contents]] in Wikipedia.
 
Individual wikis may have their own top-level categories, such as [[wikipedia:Category:Contents|Category:Contents]] in Wikipedia.
  
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== List of Categories ==
 
For a complete list of all categories which have at least one page, see [[Special:Categories]].
 
For a complete list of all categories which have at least one page, see [[Special:Categories]].
  

Latest revision as of 21:17, 3 March 2017

Categories, a software feature of MediaWiki, provide automatic indexes that are useful as tables of contents.

You can categorize pages and files by adding one or more Category tags to the content text. These tags create links at the bottom of the page that take you to the list of all pages in that category, which makes it easy to browse related articles.

Basics[edit]

  • To add a page to a category manually:
    • If the category relates to a specific version of DF (for example, Category:40d:Animals), add {{Category|Category Name}} to the end of the article.
    • If the category relates to DF in general, or unlikely to change in other versions (for example, Category:Disambiguation), add [[Category:Category Name]] to the end of the article.
Note that many categories are automatically included with templates; the list of an article's categories is displayed at the bottom of the page. You only need to add categories manually if they don't appear in the generated page, even though they may not appear in the page's source.

Summary[edit]

Each of the pages in the Category namespace represents a so-called category, a grouping of related pages, and contains an index for the pages of its category. For example, this page belongs to "Category:Help". If you open the "Category:Help" page, you will see a link to this page there.

When a page belongs to one or more categories, these categories appear at the bottom of the page (or in the upper-right corner, depending on the skin being used).

The category pages themselves contain 2 parts :

  • at their beginning, an optional part may contain text that can be edited, like any other page,
  • at their end, an ever present, automatically generated, alphabetical list of all pages in that category, in the form of links. (In fact, in ASCII order. See Special page).

To assign a category to a page:

  • If the page is a generic page (not version-specific, e.g. Character table) Add the link "[[Category:Category name]]" to the page's wikitext.
  • If the page is about a specific version of Dwarf Fortress, use {{Category|Caregory name}} instead. This places the page into a sub-category, which contains pages specific to the same version.

The usual place to add a category is at the bottom of the page.

To link a category page within a page as a normal wiki link (without adding the page to the category), prefix the link name with a colon. For example: [[:Category:Category name]]

New categories can be created before assigning any page to it, in the same way as any other regular page.

Individual wikis may have their own top-level categories, such as Category:Contents in Wikipedia.

List of Categories[edit]

For a complete list of all categories which have at least one page, see Special:Categories.

For a complete list of all created/edited categories, including the ones that don't have any page, see Special:Allpages/Category: (note the colon at the end).

Adding a page to a category[edit]

To add a page or uploaded file to a category, simply edit the page and add the following text (where Name is the name of the category you want to add it to).

[[Category:Name]] (generic pages)
{{Category|Name}} (version-specific pages)

Any number of Category tags may be added to the page and the page will be listed in all of them. Category tags, along with interwiki language links placed in the sidebar, are usually added at the very bottom of the page for the convenience of other editors.

On a categorised page, categories are displayed in the Categories: box strictly in the order they appear in the wikitext.

Sort key[edit]

By default, a page is sorted within a category under the first letter of its name — without the namespace. Also, MediaWiki groups accented characters separately from their unaccented version, so pages starting by À, Á, Ä, will be listed under separate headings, instead of under heading A.

A sort key specifies under which letter heading, and where in the category list, the page will appear. You can add a sort key by placing it inside the tag after a pipe character. For example, the tag below will add the page under heading "S".

[[Category:Name|Sort]] (generic pages)
{{Category|Name|Sort}} (version-specific pages)

Sort keys are case-sensitive, and spaces and other characters are also valid. (Spaces will place the page at the beginning of the list.) The order of the sections within a category follows the Unicode sort order. The sort key does not change the page title displayed in the category.

See Help:Sorting on Wikipedia for further information on category sorting.

Creating a category page[edit]

Categories exist even if their page has not been created, but these categories are isolated from others and serve little purpose for organization or navigation.

A category is created by creating a page in the Category: namespace. A category page can be created the same way as other wiki pages; just add "Category:" before the page title.

If you are unable to create a category, post a request here!

To avoid extra work, try searching in this wiki before creating a new category. The list of all categories can be found in "Special pages" in the "tools" box of the sidebar.

Unlike other wiki pages, it is not possible to rename (move) a category. Instead, it is necessary to create a new category and change the Category tag on every page (ideally using Special:WhatLinksHere to locate pages, or making a bot request for widely-used categories). The new category will not have the older category's page history, which is undesirable if there are many revisions.

Managing the category hierarchy[edit]

Categories may belong to other categories in a hierarchy. Since category pages are much like any other page, a Category tag may be added to the bottom of a category page.

It is a good idea to organize all categories into a hierarchy with a single top level category. The category structure can take the form of a tree with separate branches, but more often will have a graph structure. Generally, there should be a contiguous chain of parent-child links between each category and the top level category.

Hidden categories[edit]

The categories that a page is in are normally listed at the bottom of the page. In Mediawiki 1.13+, a category can be hidden from this list by adding the magic word "__HIDDENCAT__" to the category page. Hidden categories are not hidden from category pages (Template:Bugzilla).

Users can choose to see hidden categories in a separate "Hidden categories" list, by checking "Show hidden categories" in the "Appearance" section of Special:Preferences.

Hidden categories are automatically added to Category:Hidden categories. This category is specified in the system message MediaWiki:Hidden-category-category.

See also: hidden categories

Linking to a category[edit]

To create a link to a category, use a leading colon before the category name (without this colon, the current page would be added to the category):

[[:Category:Help]]Category:Help

To change the link text, write the text inside the link tag after a pipe:

[[:Category:Help|Help category]]Help category

Redirect pages that redirect to categories must also use the colon, otherwise they will be added to the category instead of redirecting.

Redirecting a category[edit]

Like normal wiki pages, category pages can be redirected to other normal or category pages. However, this is not recommended, as pages categorised in redirected categories do not get categorised in the target category (bugzilla:3311). Some Wikimedia sites use a "category redirect" template to mark redirected categories, allowing manual or automated cleanup of pages categorised there.