Template:Category pair

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Usage

Place

• {{Category pair|CATEGORY NAME1|CATEGORY NAME2}}

on the top of the category page, replacing "CATEGORY NAMEn" with the names only of the target categories, leaving out the term "Category:".

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:

• {{Category pair|CATEGORY NAME1}}

on the top of the category page, replacing "CATEGORY NAME1" with the name only of the target category, leaving out the term "Category:".

If there is no preceding category, then leave the first parameter empty, and simply place:

• {{Category pair| |CATEGORY NAME2}}

on the top of the category page, replacing "CATEGORY NAME2" with the name only of the target category, leaving out the term "Category:".

Examples

Preceding and succeeding categories, both exist

• {{Category pair|19世纪|21世纪}} →
  參見上一個分類Category:19世纪和下一個分類Category:21世纪
• {{Category pair|20世纪|22世纪}} →
  參見上一個分類Category:20世纪和下一個分類Category:22世纪

Preceding category only, which exists

• {{Category pair|20世纪}} →
  參見上一個分類Category:20世纪

Succeding category only, which exists

• {{Category pair||5世纪}} →
  參見下一個分類Category:5世纪

Preceding and succeeding categories, only preceding exists

• {{Category pair|7世纪|N世纪}} →
  參見上一個分類Category:7世纪

Preceding and succeeding categories, only succeeding exists

• {{Category pair|X世纪|5世纪}} →
  參見下一個分類Category:5世纪

Two non-existent categories, so no output

• {{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.

• {{tlx|Category pair|CATEGORY NAME1|CATEGORY NAME2|CATEGORY NAME3}} will ignore CATEGORY NAME3
• {{tlx|Category pair|CATEGORY NAME1||CATEGORY NAME2}} will ignore CATEGORY NAME2, because a duplicate | 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

See also

• {{Preceding category}}
• {{Succeeding category}}
• {{Category see also}}
• {{Category see also if exists}}