Category:CS1 maint: DOI inactive

Administrators: Please do not delete this category even if it is empty! This category may be empty occasionally or even most of the time.

This category is not shown on its member pages unless the appropriate user preference is set.

This category lists pages that have cs1|2 templates that use |doi=, where a digital object identifier doi value has been specified but then recognized as inactive. These are collected in Category:CS1 maint: DOI inactive.

This may represent:

• An incorrectly specified DOI. In this case, the DOI in question should be corrected.
• A DOI awaiting entry into the CrossRef system. In this case, the DOI will soon be active, and a bot will remove the doi-broken-date parameter next time it checks the transcluding article. The article will be correctly listed in this category but does not require further editing until the DOI becomes active.
• A system error with the DOI resolving agency. This should be reported to the DOI resolver (e.g. Crossref) so that it can be fixed - preferably including a link to the journal article claiming the link as further information.
• Publisher issues. A new publisher may have taken over a journal, or a publisher may not yet support DOIs, despite assigning them. In this case, the DOI may not produce a usable hyperlink but still serves as a permanent identifier for the article in question. It should be marked using the |doi-broken-date= parameter of {{cite xxx}}. The article will then be correctly listed in this category until the DOI becomes active.
• The DOI has changed, such as the Archives of Pathology & Laboratory Medicine which changed its DOIs when it changed publishers.
• Internal use only DOI. The American Medical Association, for example, assigns a DOI to all of its journal articles, but many of these are only in the META tags on the web pages and Crossref will not resolve these. Since these can be found with an Internet search engine and might eventually resolve they should be left in the citation.

This category is sorted by date into years. Pages in this category should only be added by Module:Citation/CS1.

By default, Citation Style 1 and Citation Style 2 error messages are visible to all readers and maintenance category messages are hidden from all readers.

To display maintenance messages, include the following text in your common CSS page or your specific skin's CSS page (common.css and skin.css respectively):

.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.

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 WP:Simple talk if you do not understand how.