Template:Commons category/doc

links to a "Category:" name in the Wikimedia Commons repository that corresponds to the article or category. If the Commons category name is misspelled or missing, the link will still appear "blue" even though the link will fail. Check the existence of the category on Commons as well as the spelling of names carefully. User:Pi bot will try to correct, or remove, links to non-existent categories. In articles, this template should be placed at the top of the last section on the page. A warning will appear if the Commons link is not on Wikidata.

Usage
The two parameters catname and showname (1 & 2) are optional, and are intended for cases where the Commons category name is different from the Wikipedia page name. The first parameter is the name of the corresponding category on the Wikimedia Commons, without the " " prefix. If this first parameter is used, then the template will display the Commons category name, which may be confusing to readers. This text can be overridden by the second parameter, where the Wikipedia page name would typically be used.

For example, on the Polar bear page, produces a link to Commons:Category:Ursus maritimus displayed as "Polar bears".

The parameter position accepts one value, left, that moves the box to the left side, instead of the default right side. More information may be found at Template:Side box.

Resolving discrepancies
This template compares locally-defined values against the interwiki links to Commons stored on Wikidata. The discrepancies are highlighted through the addition of maintenance categories. Pages can be removed from the tracking categories by correcting the local link; removing misplaced template uses; fixing the sitelinks on Wikidata; or expanding the category system on Commons. Ideally there should be one Commons category link per article, and it should be easy for readers to identify the related content on Commons. Some suggested approaches are:

The link is to a more general topic than the article:
 * 1) Is there a more specific Commons category that could be linked to instead?
 * 2) If not, could it be created with images connected to the article?
 * 3) Or if there aren't any images connected to the article on Commons, could the Commons category link be removed?

There are links to multiple Commons categories in the article:
 * 1) Could they be replaced by a single Commons category that has the rest as subcategories?
 * 2) Do all of the Commons categories still exist?
 * 3) Are they all necessary, or could they be removed?

The Commons category links back to the wrong Wikipedia article:
 * 1) Can you move the sitelink to the Wikidata item for the article?

TemplateData
 {	"description": "This template creates a small box containing a link to a category on Commons. If no value is provided the Commons category value from Wikidata is used, and if none was provided there then the page name is used.", "params": { "1": {			"label": "Category name", "description": "The name of the Commons category this template will link to. If no value is provided the Commons category value from Wikidata is used, and if none was provided there then the page name is used.", "type": "string", "required": false },		"2": {			"label": "Displayed text", "description": "The text that the link will display to the user. If no value is provided it will default to category name or page name, in that order.", "type": "string", "required": false },		"position": { "label": "Position", "description": "When set to 'left', the template will be positioned on the left side of the page. Otherwise it will default to the right side.", "type": "string", "required": false },		"nowrap": { "label": "nowrap", "description": "Stops the text of the Commons category from wrapping", "type": "string", "required": false },		"lcfirst": { "label": "lcfirst", "description": "Displays the first letter as lower-case", "type": "string", "required": false }	} } 

Redirects

 * C cat
 * Category commons
 * Category Commons
 * Cc
 * Ccat
 * Commons cat
 * Commonscat
 * Commonscategory
 * Commonsimages cat
 * Wikimedia commons cat