Difference between revisions of "Help:Categories"

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{{PD Help Page}}
 
{{PD Help Page}}
MediaWiki allows you to categorize pages and files by appending one or more '''Category''' {{#ifeq:Category|{{ns:category}}||'''({{ns:category}})'''}} tags to the content text. Adding these tags creates 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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Categories, a software feature of MediaWiki, provide automatic indexes that are useful as tables of contents.
  
==Add a page to a category==
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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.
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).
 
<nowiki>[[</nowiki>{{ns:category}}:''NAME'']]
 
  
Any number of {{ns:category}} tags may be added to the page and the page will be listed in all of them. {{ns:category}} tags can be added wherever you like in the editing text, but they are usually added at the very bottom for the convenience of other editors.
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<nowiki>[[</nowiki>{{ns:category}}:'''''e-con Systems''''']]
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'''e-con Systems'''<br>
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[http://www.e-consystems.com/ www.e-consystems.com]<br><br>
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'''System on Module'''<br>
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* [http://www.e-consystems.com/iMX6-system-on-module.asp eSOMiMX6 - i.MX6 System on Module]
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* [http://www.e-consystems.com/iMX6-development-board.asp Ankaa - eSOMiMX6 Reference Design]
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* [http://www.e-consystems.com/DM3730-computer-on-module.asp eSOM3730 - AM3703/DM3730 Computer on Module]
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* [http://www.e-consystems.com/DM3730-development-kit.asp Almach - eSOM3730 Reference Design]
  
If categories are placed into a section of text by themselves, any nearby excess whitespace will be ignored. If placed between a list and regular text, you will need to manually add the &lt;br /&gt; linebreak.
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<nowiki>[[</nowiki>{{ns:category}}:'''''System on Module''''']]
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'''e-con Systems'''<br>
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[http://www.e-consystems.com/ www.e-consystems.com]<br><br>
 +
'''System on Module'''<br>
 +
* [http://www.e-consystems.com/iMX6-system-on-module.asp eSOMiMX6 - i.MX6 System on Module]
 +
* [http://www.e-consystems.com/iMX6-development-board.asp Ankaa - eSOMiMX6 Reference Design]
 +
* [http://www.e-consystems.com/DM3730-computer-on-module.asp eSOM3730 - AM3703/DM3730 Computer on Module]
 +
* [http://www.e-consystems.com/DM3730-development-kit.asp Almach - eSOM3730 Reference Design]
  
Adding {{ns:category}} tags to categories will make them subcategories. It is a good idea to organize all your categories into a hierarchy with a single top level category.
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==Managing the category hierarchy== 
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Categories may belong to other categories in a hierarchy. Since category pages are much like any other page, a {{ns:category}} tag may be added to the bottom of a category page.  
  
===Sort key===
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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.  
A ''sort key'' specifies where the page will appear in the category list, and under which letter heading. (By default, the page is sorted under the first letter of its full name ''including its namespace''.) You can add a sort key to a page by adding it inside the {{ns:category}} tag. For example, the tag below will add the page under the heading "S".
 
<nowiki>[[</nowiki>{{ns:category}}:''NAME''|''SORT'']]
 
  
Sort keys are case-sensitive, and a space is also valid. 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.
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==Linking to a category==
 
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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):
==Create a category==
 
A category can be created the same way as as other wiki pages (See [[Help:Starting a new page]]); just add "<code>{{ns:category}}:</code>" before the page title. (Category lists exist even if their description page is not created, but these categories are isolated from others and serve little purpose for organization or navigation.)
 
 
 
It is not possible to rename (move) a category, unlike other wiki pages. It is necessary to create a new category and change the {{ns:category}} tag on every page. The new category will not have the older category's page history, which is undesirable if there are many revisions.
 
 
 
To avoid extra work, try searching within your wiki before creating a new category. The list of all categories can be found in "{{lcfirst:{{int:specialpages}}}}" in the "{{lcfirst:{{int:toolbox}}}}" box of the [[Help:Navigation#Sidebar|sidebar]].
 
  
===Hidden categories===
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:<code><nowiki>[[</nowiki>:{{ns:category}}:Help]]</code> &rarr; '''[[:{{ns:category}}:Help]]'''
The categories that a page is in are normally listed at the bottom of the page. A category can be hidden from these lists by adding "<code><nowiki>__HIDDENCAT__</nowiki></code>" to the category page. (Each user can choose to see them in a separate "{{int:hidden-categories}}" list, by checking "{{int:tog-showhiddencats}}" in the "Misc" section of [[Special:Preferences]].)
 
  
Hidden categories are automatically added to [[:Category:{{mediawiki:hidden-category-category}}]] (specified by [[MediaWiki:Hidden-category-category]]).
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To change the link text, write the text inside the link tag after a pipe:
  
Hidden categories are not hidden on category pages ({{bugzilla|15550}})
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:<code><nowiki>[[</nowiki>:{{ns:category}}:Help|Help category]]</code> &rarr; '''[[:{{ns:category}}:Help|Help category]]'''
 
 
==Linking to a category==
 
To create a link to a category, use a leading colon before the category name. (Without this colon, it will add the current page to the category.) To change the link text, write the text inside the link tag after a pipe.
 
<nowiki>[[</nowiki>:{{ns:category}}:''NAME'']]
 
<nowiki>[[</nowiki>:{{ns:category}}:''NAME''|''TEXT'']]
 
 
   
 
   
For example, to link to "{{ns:category}}:Help", write "<code><nowiki>[[</nowiki>:{{ns:category}}:Help]]</code>", which will result in [[:{{ns:category}}:Help]].
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[[Help:Redirects|Redirect pages]] that redirect to categories must also use the colon, otherwise they will be added to the category instead of redirecting.
  
[[Help:Redirect|Redirect pages]] must also use the colon, otherwise it will be added to the category instead of redirecting.
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==Redirecting a category==
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Like normal wiki pages, category pages can be redirected to other normal or category pages.
  
 
{{Languages}}
 
{{Languages}}
 
[[Category:Help|Categories]]
 
[[Category:Help|Categories]]

Revision as of 02:57, 22 July 2015

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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.

[[Category:e-con Systems]]

e-con Systems
www.e-consystems.com

System on Module

[[Category:System on Module]]

e-con Systems
www.e-consystems.com

System on Module

Managing the category hierarchy

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.

Linking to a category

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

Like normal wiki pages, category pages can be redirected to other normal or category pages.

Language: English