Category:CS1 maint: article number as page number

It is used to build and maintain a list or 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:

This category is hidden on its member pages—unless the corresponding user preference (Appearance → Show hidden categories) is set.
These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience.
These categories also serve to aggregate members of several lists or subcategories into a larger, more efficient list (discriminated by classifications).
Typically, tracking categories are automatically populated by templates invoked in pages or by the MediaWiki software (see Special:TrackingCategories for an overview of the latter).

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 {{cite journal}} templates and for {{citation}} templates that use the |journal=, |doi=, and |page(s)= parameters. Module:Citation/CS1 emits this category when the value assigned to |page= or |pages= appears to be an article number and not a page number.

Module:Citation/CS1 skips |page(s)= values that:

are ranges separated by underscore, hyphen, emdash, endash, figure dash, or minus character
are comma- or semicolon-separated lists of pages
have external urls
are digit-only values less than 10000

For those templates that are not skipped, the module compares the trailing (rightmost) characters of the |doi= value against the whole value of the |page(s)= value. There are a variety of tests:

five or more digits – |page=100393 matches |doi=10.1016/j.gfs.2020.100393
five or more characters – |page=CD004052 matches |doi=10.1002/14651858.CD004052
five or more characters with e prefix (case insensitive) – |page=eadl0822 matches |doi=10.1126/sciadv.adl0822
exactly eight digits; modified by the test to insert a dot between the 4th and 5th digits – |page=20170301 modified to 2017.0301 matches |doi=10.1098/rsbl.2017.0301
CD prefix (case insensitive) followed by (typically) six digits; modified by the test to append .pubn suffix where n is a single digit – |page=CD005216 matches |doi=10.1002/14651858.CD005216.pub2

To fix cs1|2 templates that emit this maintenance message/category, ensure that the value assigned to |page= is an insource location page number. When the page number is not a page number, change |page= to |article-number=.

Pages with this condition are automatically placed in Category:CS1 maint: article number as page number.^[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.)

:root .mw-parser-output .cs1-maint {display: inline;} /* display Citation Style 1 maintenance messages */

To display hidden-by-default error messages:

:root .mw-parser-output .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.

After (error and/maintenance) messages are displayed, it might still not be easy to find them in a large article with a lot of citations. Messages can then be found by searching (with Ctrl-F) for "(help)" or "cs1".

To hide normally-displayed error messages:

:root .mw-parser-output .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".

Notes

^ Pages in the Category talk, Draft talk, File talk, Help talk, MediaWiki talk, Module talk, Portal talk, Talk, Template talk, User, User talk, and Wikipedia talk namespaces are not included in the tracking categories. In addition, pages with names matching the patterns '/[Ss]andbox', '/[Tt]estcases', '/[^/]*[Ll]og', and '/[Aa]rchive' are not included in the tracking categories.

[categories-1] Pages in the Category talk, Draft talk, File talk, Help talk, MediaWiki talk, Module talk, Portal talk, Talk, Template talk, User, User talk, and Wikipedia talk namespaces are not included in the tracking categories. In addition, pages with names matching the patterns '/[Ss]andbox', '/[Tt]estcases', '/[^/]*[Ll]og', and '/[Aa]rchive' are not included in the tracking categories.

[a]