Category:CS1 maint: BOT: original-url status unknown

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. They are not part of the encyclopedia's categorization scheme. More information: This category is hidden on its member pages—unless the corresponding user preference 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 sub-categories into a larger, more efficient list (discriminated by classifications).

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 has a backlog that requires the attention of willing editors. This notice will hide itself when this category has fewer than 1000 items. (recount)

This is a tracking category for CS1 citations that use the bot-specific parameter value |dead-url=bot: unknown. The keyword bot: unknown is intended for use by bots to identify original urls that are alive but not confirmed to link to appropriate material. Editors should review these urls and adjust the value assigned to |dead-url= accordingly. Pages in this category should only be added by Module:Citation/CS1.

Citation Style 1 and Citation Style 2 error messages are visible to all readers. Maintenance category messages remain hidden. Editors who wish to see all cs1|2 maintenance category messages can do so by updating either their common CSS page or their specific skin's CSS page (common.css and skin.css respectively) to include the following:

.citation-comment {display: inline !important;} /* show all Citation Style 1 error and maintenance 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 WP:NULLEDIT will resolve that issue.