 | This template is used on approximately 2,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them. |
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Usage
Typical usage should be on dissimilar preceding/succeeding categories, or where a large gap exists in otherwise sequential categories. For similarly named sequential categories with gaps less than 5 years, use ((Category series navigation)) instead, and ((Category series navigation|skip-gaps=yes)) for gaps up to 15 years from the parent.
- For 2 adjacent categories, a preceding
Category:NAME1, and a succeedingCategory:NAME2, place:
((Category pair|NAME1|NAME2))- at the top of the category page. 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|NAME1))- at the top of the category page.
- If there is no preceding category, then leave the first parameter empty, and simply place:
((Category pair||NAME2))- at the top of the category page.
Examples
- Preceding and succeeding categories, both exist
((Category pair|1934 FIFA World Cup|1950 FIFA World Cup))→
- Preceding category only, which exists
((Category pair|1934 FIFA World Cup))→
- Succeeding category only, which exists
((Category pair||1950 FIFA World Cup))→
- Preceding and succeeding categories, only preceding exists
((Category pair|1934 British Empire Games|1942 British Empire Games))→
- Preceding and succeeding categories, only succeeding exists
((Category pair|1946 British Empire Games|1954 British Empire and Commonwealth Games))→
- Two non-existent categories, so no output
((Category pair|AD 10 FIFA World Cup|AD 18 FIFA World Cup))→
Error checking
Only the first two parameters are processed, others are ignored.
If more than two parameters are supplied, a warning message is shown when the page is previewed. When it is saved, the page is added to the hidden tracking category: Category:Pages using category pair with more than 2 parameters.
If more than two parameters are supplied, the template is unlikely to do what the editor intended. For Category:NAME1, Category:NAME2, and Category:NAME3, for example:
((Category pair|NAME1|NAME2|NAME3))will ignoreCategory:NAME3, and((Category pair|NAME1||NAME2))will ignoreCategory:NAME2, because a duplicate|character between the two categories causesCategory:NAME2to be the third parameter rather the second.
Tracking categories
- 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
- See above: Error checking
See also
- ((Category series navigation)) — for similarly named sequential categories
- ((Preceding category))
- ((Succeeding category))
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