View source for Wiki143:Navigation template

{{hatnote|For the navigation template guideline, see [[Wikipedia:Categories, lists, and navigation templates#Navigation templates|Wikipedia:Categories, lists, and navigation templates §&nbsp;Navigation templates]].}}
{{hatnote|For the Navbox template page, see [[Template:Navbox]]}}
{{redirect|WP:NAV|navigational popups|WP:NAVPOP|polling in discussions|WP:NOTVOTE}}
{{Supplement|interprets=[[Wikipedia:Categories, lists, and navigation templates]] guideline|WP:NAV}}
{{nutshell|A navigation template links between existing articles belonging to the same topic on English Wikipedia. There are two types: "navigation boxes" (or navboxes) and "sidebars".}}{{Linking and page manipulation|linking and diffs}}

A '''navigation template''' is a grouping of links used in multiple related articles to facilitate navigation between those articles. Editing of a navigation template is done in a central place, the template page.

There are two main varieties of navigation template: ''navigation boxes'' (or ''navboxes''), designed to sit at the very bottom of articles, and ''sidebars'', designed to sit at the side of the article text. The two are complementary and either or both may be appropriate in different situations.

The usual way to create navigation templates is to use the {{tl|navbox}} or {{tl|sidebar}} master templates. This simplifies the process of creating a functional and consistent template.

'''Do not rely solely on navboxes for links to articles highly relevant to a particular article.''' Navboxes are not displayed on the [[Help:Mobile access|mobile website for Wikipedia]], which accounts for around half of readers. See Phabricator ticket {{Phab|T124168}} for progress on the mobile issue. See Phabricator ticket {{Phab|T124168}} for work on making navboxes' appearance better on mobile.

Navboxes are categorized under [[:Category:Navigational boxes]]. Some [[Wikipedia:WikiProject|WikiProjects]] maintain a list of their navigation templates.

== Types ==

The two main types of navigation template are navboxes and sidebars. The two serve similar purposes: to allow related subjects to link to each other easily in a consistent manner.

===Navboxes===
'''Navboxes''' are footer templates that sit below the [[Wikipedia:Manual of Style/Layout#Standard appendices and footers|standard article appendices]] and are laid out horizontally. They are created using the {{tl|navbox}} template. An example navbox template, {{tl|named sapphires}}, is shown below:
{{named sapphires|state=expanded}}

===Sidebars===
{{geodesy}}
'''Sidebars''' sit alongside content, in the same manner as [[Wikipedia:WikiProject Infoboxes|infoboxes]], and are predominantly laid out vertically. They are created using the {{tl|sidebar}} template. An example sidebar, {{tl|geodesy}}, is shown to the right:

===Usage===
The two types are used interchangeably, and either or both may be appropriate in different circumstances. The primary differences between the two are:

* Navboxes are laid out horizontally, and so work best for longer lists of links in a small number of sub-categories. As they are placed at the very bottom of articles, they are better for broader lists of links than would be appropriate in a sidebar. Articles often have more than one navbox and content may overlap to a degree: nevertheless, [[Wikipedia:Not everything needs a navbox|not everything needs a navbox]], so navbox templates should only be created when they would be genuinely useful as navigational tools.
* Sidebars are laid out predominantly vertically, and are placed relatively prominently in the body of articles alongside the text. This makes them useful for smaller amounts of directly relevant links. Tangential information should be kept out of sidebars. Few articles have more than one sidebar.

== Properties ==
The style of any navigation template depends on its articles, how they are most intuitively presented, and previously established convention.

=== Navigation templates provide navigation ''within'' Wikipedia ===
{{Shortcut|WP:NAV-WITHIN}}
* They are intended to link articles to each other.  That is, every article listed on a particular navigation template generally has the template placed on its page.
* The goal is not to cram as many related articles as possible into one space. Ask yourself, does this help the reader in reading up on related topics? Take any two articles in the template. Would a reader really want to go from A to&nbsp;B?
* They should be kept small in size as a large template has limited navigation value. For large navigation templates, consider the following:
** Splitting them into multiple, smaller templates on each sub-topic, and especially if individual [[Template:Navbox#Parameter list|groups]] within the template are [[Wikipedia:Manual of Style#Scrolling lists and collapsible content|collapsible]] [[Template:Navbox#Child navboxes|child navboxes]] that have Wikipedia articles about their subjects and the smaller navigation templates would still satisfy [[Wikipedia:Categories, lists, and navigation templates#Navigation templates|most or all of the guidelines for good navboxes]]. Where this is done, consider including only the articles about the subjects of the new templates in the original template to minimize template [[Wikipedia:Avoid template creep#Do multiple templates on this article give the same information?|overlap]] and [[Wikipedia:Avoid template creep#Do we have two or three templates where one would do?|clutter]].
** For example, {{tl|EMD diesels}} lists all models of diesel locomotives built by one manufacturer, but is too large to be transcluded on each of their articles. Instead, the individual sections of {{tl|EMD diesels}} were split out into their own templates: {{tl|EMD GPs}}, {{tl|EMD SDs}}, etc.
** Doing the above with only one template using [[mw:Help:Extension:ParserFunctions|ParserFunctions]].
** Linking only the immediately related articles while hiding the rest, like in the case of [[Special:Permalink/198921805|Johnny Cash]].
** Avoiding repeating links to the same article within a template.
* They should not be too small. A navigation template with fewer than a handful of links can easily be replaced by "See also" sections or relevant {{tl|main article}} and {{tl|see also}} links within the articles' sections, as well as be [[Wikipedia:Avoid template creep|merged into a larger template]]. (See essays "[[Wikipedia:Not everything needs a navbox|Not everything needs a navbox]] and "[[Wikipedia:A navbox on every page|A navbox on every page]]".)
* As [[Wikipedia:What Wikipedia is not#Wikipedia is not a mirror or a repository of links, images, or media files|Wikipedia is not a repository of links]], navigation templates do not provide [[WP:external links|external links]] to other websites.

=== Navigation templates provide navigation among ''existing'' articles ===
{{Shortcut|WP:EXISTING}}
* [[Wikipedia:Red link|Red links]] should normally be avoided unless they are very likely to be developed into articles that satisfy the [[Wikipedia:Notability|general notability guideline]] or one of the [[Wikipedia:Notability#Subject-specific notability guidelines|subject-specific notability guidelines]], and should not be included where [[Wikipedia:What Wikipedia is not|Wikipedia would be serving a non-encyclopedic purpose]] if articles were created from the red links.
* Red links can be retained in navigation templates that represent a well-defined and complete set of data (geographic divisions, annual events, filmographies, etc.), where deleting red links would leave an incomplete and misleading result. Even then, editors are encouraged to [[Wikipedia:Write the article first|write the article first]].
* Likewise, [[Wikipedia:Redirect|redirects]] should also normally be avoided for the reasons outlined in [[WP:NAVNOREDIRECT]]. The general exception to this is when the redirect represents a distinct sub-topic of an article rather than simply being an alternative name.
* Unlinked text should be avoided. 
* ''Note:'' In navigation boxes about musical ensembles, it may be appropriate to list all of the members of the ensemble, to avoid the perception that the ensemble is a solo act, provided that at least one member of the ensemble is notable.

=== Navigation templates provide navigation between ''related'' articles ===
{{shortcut|WP:NAV-RELATED}}

* If the articles are not established as related by [[Wikipedia:Identifying reliable sources|reliable sources]] in the actual articles, then it is probably not a good idea to interlink them.
* Articles included in a navigation template should be more than ''loosely-related'', but may include ''tangentially-related'' topics since [[Wikipedia:Categories, lists, and navigation templates#Advantages|one of the advantages of navigation templates is that they mitigate the size and need for See also sections]] that [[Wikipedia:Manual of Style/Layout#"See also" section|serve the purpose of navigating tangentially-related topics]] and are [[Wikipedia:Categories, lists, and navigation templates#Navigation templates|where links to tangentially-related topics would be included in the absence of the template]].
* While [[Wikipedia:Categories, lists, and navigation templates#Overlapping categories, lists and navigation templates are not considered duplicative|navigation templates that overlap with categories and lists are not considered duplicative]], the subjects of navigation templates need to be narrower and more specific topics than the subjects of many categories and lists because many templates can become oversized otherwise. Conversely, including [[Wikipedia:Categories, lists, and navigation templates#Lists|list articles, articles with list sections]], or [[Wikipedia:Categories, lists, and navigation templates#Categories|category-topic articles]] as non-subject articles in navigation templates where the templates' subjects are members of the list or category can [[Wikipedia:Avoid template creep|lead to clutter]] on articles included in templates.
* Navigation templates should only be created for subjects where every article related to the subject will be included because [[Wikipedia:Categories, lists, and navigation templates#Disadvantages|one of the disadvantages of navigation templates]] is that an [[Wikipedia:Avoid template creep#Do we really need this template at all?|arbitrary selection of articles related to the template's subject]] can [[Wikipedia:Neutral point of view|present a point of view]] or give the subjects of the selected articles included [[Wikipedia:Neutral point of view#Due and undue weight|undue weight]].
* For complex topics in science, technology, history, etc., a navigation box can provide a comprehensive introduction to a topic. For example, {{Tl|Wind power}} links to subsidiary and supporting topics that provide background and context necessary for understanding the main [[Wind power]] article. While the main [[Wind power]] article already contains inline links to the subsidiary articles, the subsidiary articles themselves are smaller and their prose may not place them into the overall context with each other. Editors who work on the subsidiary articles in isolation may be unaware of this context. The navigation template provides an easy way for the subsidiary articles, even when they begin as stubs, to instantly inherit the conceptual structure of the main article.

=== Navigation templates are not arbitrarily decorative ===
{{Shortcut|WP:NAVDECOR|WP:NAVCOLOR|WP:NAVCSS|WP:NAVIMAGES}}
{{See also|Wikipedia:Manual of Style/Icons}}
* There should be justification for a template to deviate from the colors and styles contained in [[Module:Navbox/styles.css]] and [[Module:Sidebar/styles.css]].
* Per [[MOS:DECOR]], images are rarely appropriate in navboxes. Just like colors and styles, they should have a justification to appear. Specifically, there should be no national or regional flags or coats of arms. A rare example of an appropriate image is [[special:permalink/995622594|this]]: a map shows (in green) the location of a region within the state of Kazakhstan, and this is consistently implemented for [[:category:Kazakhstan region templates|all state's regions]].
* There are two basic layouts:
** On the right side of page—for example {{tl|History of China}}.
*** For meta-template, see {{tl|sidebar}}
** Footer boxes—for example {{tl|Health in China}}, designed to appear at the bottom of each article, stacked with other similar templates. ''See also: [[Wikipedia:Manual of Style/Layout#Standard appendices and footers|Wikipedia:Footers]] for information on placement''
*** For footer boxes, {{tl|Navbox}} is the standard.
**** Existing hard-coded collapsible elements should be converted to one of the templates in [[:Category:Collapse templates]]. This standardizes the look and eases future maintenance.
**** The width of footer boxes should be 100% unless the convention for that type of article is otherwise. It looks inconsistent if multiple boxes in the same article have varying widths.

== Advantages ==
{{see also|Wikipedia:A navbox on every page#Benefits of navboxes|Wikipedia:Categories, lists, and navigation templates#Advantages}}

Advantages of using navigation templates rather than listing all the links under "[[Wikipedia:Manual of Style/Embedded lists#Related topics (navigational lists)|See also]]" sections include:

* reduction of clutter in that [[Wikipedia:Manual of Style/Layout|area of the article]] before "References" and "External links",
* compactness of the template compared to a standard list or table, in the case of many links,
* if the most immediately related links are kept under "See also", the reader has a better idea of scope,
* less directly related links are out of the way or in some cases hidden by default,
* ease of maintenance in updating the template as articles get created or deleted,
* aesthetically pleasing appearance to many users,
* new articles in a subject area immediately gain the basic [[Wikipedia:Manual of Style/Linking#General points on linking style|link structure]] of existing related articles, eliminating the need for many editors to individually build up their own links and rewrite background material.
* when a new article or an older article that was [[Wikipedia:Orphan|orphaned]] is placed in a navbox, the page instantly has a large number of links to it

== Alternatives ==

In certain cases, there are alternatives preferable over the creation of a new navigation template.

* If the group of articles overlaps significantly with an existing [[Wikipedia:Categorization|category]] or [[Wikipedia:Stand-alone lists|stand-alone list]], consider adding a link to one of these to the [[Wikipedia:See also section|see also section]].
* For a series of articles whose only shared characteristic is that they hold the same position or title, such as [[Peerages in the United Kingdom|peerage]] or world champion sporting titles, consider using {{tl|succession box}}. Variant templates for persons who have held several notable offices are discussed at [[Template talk:Succession box]].
* For relating articles across different categories in a logical sequence, use a [[Wikipedia:WikiProject_Succession_Box_Standardization/Templates|succession template]].
* Use one of these [[Wikipedia:Hatnote|Hatnote]]s: {{Tl|Broader}}, {{Tl|Further}} or {{Tl|Main}}.
* Create an [[Wikipedia:Outlines|outline]]: a hierarchical list.

== Template limits ==
{{main|Help:Templates#Template limits}}

There are [[Wikipedia:Template limits|limits to the number of templates]] an article may have. When a page exceeds this limit it may look fine in preview but, after the edit is saved, one or more footer navboxes display as wikilinks to the now excess navboxes (for example, displaying a link to "Template:Navbox" rather than the Navbox template itself). Solutions for this problem include (a) removing a template, and (b) setting up the footer navboxes so the least important one becomes the "extra" navbox (the one the reader will have to navigate to a separate page to in order to view).

== See also ==

* [[Wikipedia:Template namespace]] for an introduction to templates
* [[Wikipedia:Requested templates]] for help in editing templates
* [[Wikipedia:Categories, lists, and navigation templates]], for an actual guideline on the subject
* [[Wikipedia:Template index]], for other types of templates
* [[Wikipedia:Manual of Style/Infoboxes]]
* [[Wikipedia:Article series]], related information
* [[Wikipedia:Series templates]], related information
* [[Wikipedia:A navbox on every page]], an essay
* [[Wikipedia:Not everything needs a navbox]], another essay
* [[Wikipedia:Navigational boxes]] redirects here; to view the historical archive, see [[Wikipedia:Navigational boxes (archive)]]
* [[Wikipedia:Redirect#Bypass redirects in navigational templates]]
* [[Wikipedia:WikiProject Navigation templates]]
* {{tl|Quicktemplates}}, a table of templates
* {{tl|Wikipedia editor navigation}}, an amalgamation of navboxes 

{{Navigation templates}}
{{Wikipedia templates}}

[[Category:Wikipedia essays about templates]]
[[Category:Wikipedia navigation templates|+]]
[[Category:Wikipedia template help]]