imported>Kcx36：翻译外文链接

2025-07-13T08:27:28Z

翻译外文链接

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{{Documentation subpage}}

{{Lua|Module:Category pair|Module:Check for unknown parameters}}

==Usage==
Place
* {{tlx|Category pair|CATEGORY NAME1|CATEGORY NAME2}}
on the top of the category page, replacing "<code>CATEGORY NAMEn</code>" with the ''names only'' of the target categories, leaving out the term "<code>Category:</code>".

Each category is displayed only if it exists. If neither category exists, nothing will be displayed.

If there is no succeeding category, you may simply place:
* {{tlx|Category pair|CATEGORY NAME1}}
on the top of the category page, replacing "<code>CATEGORY NAME1</code>" with the ''name only'' of the target category, leaving out the term "<code>Category:</code>".

If there is no preceding category, then leave the first parameter empty, and simply place:
* {{tlx|Category pair|<nowiki> </nowiki>|CATEGORY NAME2}}
on the top of the category page, replacing "<code>CATEGORY NAME2</code>" with the ''name only'' of the target category, leaving out the term "<code>Category:</code>".

==Examples==
;Preceding and succeeding categories, both exist
* {{tlx|Category pair|19世纪|21世纪}} → {{Category pair|19世纪|21世纪}}
* {{tlx|Category pair|20世纪|22世纪}} → {{Category pair|20世纪|22世纪}}
;Preceding category only, which exists
* {{tlx|Category pair|20世纪}} → {{Category pair|20世纪}}
;Succeding category only, which exists
* {{tlx|Category pair|<nowiki></nowiki>|5世纪}} → {{Category pair||5世纪}}
;Preceding and succeeding categories, only preceding exists
* {{tlx|Category pair|7世纪|N世纪}} → {{Category pair|7世纪|N世纪}}
;Preceding and succeeding categories, only succeeding exists
* {{tlx|Category pair|X世纪|5世纪}} → {{Category pair|X世纪|5世纪}}
; Two non-existent categories, so no output:
* {{tlx|Category pair|81世纪|83rd century}} → {{Category pair|81世纪|83rd century}}

== Error checking ==
If more than two parameters are supplied, a warning message is shown when the page is previewed and when it is saved the page is added to a hidden tracking category: [[:Category:Pages using Template:Category pair with more than 2 parameters]].

Only the first two parameters are processed. Others are ignored.

If more than two parameters are supplied, the template is unlikely to do what the editor intended e.g.
* <code><nowiki>{{tlx|Category pair|CATEGORY NAME1|CATEGORY NAME2|CATEGORY NAME3}}</nowiki></code> will ignore CATEGORY NAME3
* <code><nowiki>{{tlx|Category pair|CATEGORY NAME1||CATEGORY NAME2}}</nowiki></code> will ignore CATEGORY NAME2, because a duplicate <code>|</code> character between the two categories causes CATEGORY NAME2 to be the third parameter rather the second

== Tracking categories ==
* [[:Category:category pair没有输出的页面]]
: If neither parameter is a category which currently exists the template will produce no output. This is ''not necessarily an error''; the other categories may simply be part of an incomplete series which will be completed in due course
* [[:Category:category pair参数超过2个的页面]]
: See above: [[#Error checking|Error checking]]

==See also==
* {{tl|Preceding category}}
* {{tl|Succeeding category}}
* {{tl|Category see also}}
* {{tl|Category see also if exists}}

{{Category hatnote templates}}

<includeonly>{{sandbox other||
[[Category:分类页面的顶注模板]]
[[Category:添加追踪分类的模板]]
}}</includeonly>

Template:Category pair/doc - 版本历史

imported>Kcx36：​翻译外文链接

imported>Kcx36：翻译外文链接