View source for Template:Year nav topic/doc

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   - This template uses expressions (#expr) to calculate centuries,
     decades, and year numbers surrounding the year parameter.
   - Negative numbers are passed through, not as "BC" but negative.
   - Variables are not used, as they were not a supported feature
     (when this template was created), so calculations are repeated
     each time, as needed to determine results.
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===Usage===
::Format: &nbsp; <code><nowiki>{{Year nav topic|year#|subject}}</nowiki></code>
::Format: &nbsp; <code><nowiki>{{Year nav topic|year#|subject|subj2}}</nowiki></code>
::Format: &nbsp; <code><nowiki>{{Year nav topic|1=year#|2=subject|3=subj2}}</nowiki></code>
::Format: &nbsp; <code><nowiki>{{Year nav topic|year#|subj1|subj2|subj3|subj4}}</nowiki></code>
Takes multiple parameters: the year# (year 101 or higher),
followed by the main subject (such as: ''music''), followed by optional related subjects, separated by vertical bars:
* The year# becomes the bolded center of the 20-year range for the main subject, and any (optional) related subjects are displayed with a 6-year selection range.
* For the first subject "xxx" there should be an article (or redirection) using the name "List_of_years_in_xxx" (which is the top line displayed in the navigation-box).
* For the first subject "xxx" there should be a specific all-years navigation article using the name "Table_of_years_in_xxx" (the "table" link displayed in box), which has a compressed table linking all year/decade articles about the subject (such as: "Table of years in film").
* The box width expands 5%-15% for optional subjects, widening to fit longer names (such as "archaeology" or "video gaming").

===Examples===
The example code is on the left, and the wiki-box display is on the right.<br>
<code><nowiki>{{Year nav topic|1970|music}}</nowiki></code>
{{Year nav topic|1970|music}}
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<code><nowiki>{{Year nav topic|1725|architecture}}</nowiki></code>
{{Year nav topic|1725|architecture}}

;Note: This example shows the additional link to Buildings and structures completed that year, which appears only on Architecture pages.
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<code><nowiki>{{Year nav topic|1798|archaeology|science}}</nowiki></code>
{{Year nav topic|1798|archaeology|science}}
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<code><nowiki>{{Year nav topic|1905|art|film|music}}</nowiki></code>
{{Year nav topic|1905|art|film|music}}
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<code><nowiki>{{Year nav topic|1497|art|music______|architecture_|literature}}</nowiki></code>
{{Year nav topic|1497|art|music______|architecture_|literature____}}
{{-}}
<code><nowiki>{{Year nav topic|1497|science|music     |architecture|literature }}</nowiki></code>
{{Year nav topic|1497|science|music            |architecture|literature }}

; Note: This example shows use of trailing spaces, rather than underbars ("__") to align topics.
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<code><nowiki>{{Year nav topic|1893|science|archaeology|television|film}}</nowiki></code>
{{Year nav topic|1893|science|archaeology|television|film}}
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<code><nowiki>{{Year nav topic|101|music|art}}</nowiki></code>
{{Year nav topic|101|music|art}}
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<code><nowiki>{{Year nav topic|100|art}}</nowiki></code> <span class="previewnote">'''[invalid]'''</span>
{{Year nav topic|100|art}}

; Note : This template is not valid with years 100 and below. Use {{tl|Year nav BC}} or other history nav templates instead.
{{-}}
<code><nowiki>{{Year nav topic|2=philosophy|3=literature}}</nowiki></code> 
{{Year nav topic|2=philosophy|3=literature}}

; Note: If the year is omitted and the other parameters are specified with <code>2=</code>, <code>3=</code>, etc., the year will be automatically filled in from the page title. If no year is found in the page title, 1700 will be used.
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==Tracking categories==
*{{clc|Articles using year nav template with extra parameters}}

==See also==
*{{tl|Year nav topic}}
*{{tl|Year nav topic2}}
*{{tl|Year nav topic3}}
*{{tl|Year nav topic4}}
*{{tl|Year nav topic20}} (up to 20 optional topics and only one line of years)

<includeonly>{{Sandbox other||
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[[Category:History and events templates]]
[[Category: Timelines by year templates]]

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