 | This is a tracking category. It is used to build and maintain lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the encyclopedia's categorization scheme.
More information:
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 | Administrators: Please do not delete this category as empty! This category may be empty occasionally or even most of the time. |
This is a tracking category for CS1 citations that use |ref= where the assigned value is the same as the CITEREF anchor ID automatically created by the cs1|2 template. This {{cite book}} template:
{{cite book |last=Black |first=AB |last2=Blue |first2=CD |date= 2021 |title=Title}}
will create: CITEREFBlackBlue2021 as its CITEREF anchor ID.
{{sfnref|Black|Blue|2021}} will create the same CITEREF anchor ID: CITEREFBlackBlue2021
Templates should not include |ref=CITEREF<author surnames list><year>or|ref={{sfnref|<{{var|surname}}>|...|<{{var|year}}>}} if the resulting CITEREF anchor ID will match the cs1|2 template's automatically created CITEREF anchor ID.
Pages in this category should only be added by Module:Citation/CS1.
Pages with this condition are automatically placed in Category:CS1 maint: ref duplicates default.[a]
By default, Citation Style 1 and Citation Style 2 error messages are visible to all readers and maintenance messages are hidden from all readers.
To display maintenance messages in the rendered article, include the following text in your common CSS page (common.css) or your specific skin's CSS page and (skin.css).
(Note to new editors: those CSS pages are specific to you, and control your view of pages, by adding to your user account's CSS code. If you have not yet created such a page, then clicking one of the .css links above will yield a page that starts "Wikipedia does not have a user page with this exact name." Click the "Start the User:username/filename page" link, paste the text below, save the page, follow the instructions at the bottom of the new page on bypassing your browser's cache, and finally, in order to see the previously hidden maintenance messages, refresh the page you were editing earlier.)
.mw-parser-output span.cs1-maint {display: inline;} /* display Citation Style 1 maintenance messages */
To display hidden-by-default error messages:
.mw-parser-output span.cs1-hidden-error {display: inline;} /* display hidden Citation Style 1 error messages */
Even with this CSS installed, older pages in Wikipedia's cache may not have been updated to show these error messages even though the page is listed in one of the tracking categories. A null edit will resolve that issue.
I use CTRL+F and search for (help) to find error messages and cs1 to find maintenance messages.
To hide normally-displayed error messages:
.mw-parser-output span.cs1-visible-error {display: none;} /* hide Citation Style 1 error messages */
You can personalize the display of these messages (such as changing the color), but you will need to ask someone who knows CSS or at the technical village pump if you do not understand how.
Nota bene: these CSS rules are not obeyed by Navigation popups. They also do not hide script warning messages in the Preview box that begin with "This is only a preview; your changes have not yet been saved".
The following 200 pages are in this category, out of approximately 504 total. This list may not reflect recent changes.
