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 theencyclopedia's categorization scheme.
These categories are used to track, build and organize lists of pages needing "attentionen 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 is a tracking category forCS1 citations with unrecognized parameter names.
Citation Style 1 andCitation Style 2 templates report this error when the name portion of a parameter's|name=value pair is not recognized as a valid name. Typically, this is caused by spelling or capitalization errors or when a page is reverted to a version where the citation template did support the parameter.
The CS1|2 engine does not ignore unrecognized parameters. The purpose of the citation is to properly identify the source, not to act as a repository of notes and ancillary information.
CS1|2 template parameters are lower case. CS1|2 will report this error when the parameter's name contains uppercase letters (Xxxx, xxXx, XXXX) but the parameter's name is defined as lowercase (xxxx). Some identifier parameters, like|isbn=,|pmc=,|doi=, etc., can be either lower case or upper case, but not of mixed case (|isbn= or|ISBN= but not|Isbn=). Forcommon parameter misspellings, like|pubisher= instead of|publisher= and some former template parameters, CS1|2 will suggest a valid parameter name. Thelist of deprecated and recently removed parameters may contain additional information as well.
Reported unknown parameters following a|DUPLICATE_<param>= scheme are created byCitation Bot when it finds duplicate parameters|<param>= in a template.
To resolve this error, replace the erroneous parameter name with a correct one, possibly using the suggested name. Ensure that the parameter's name is correctly spelled and that there are no characters except spaces between the parameter's name and the leading vertical bar (|) or trailing equals sign (=). A list of valid parameters can be found by consultingHelp:Citation Style 1 or visiting the description page of the specific template being used, such as{{cite web}},{{cite book}},{{cite journal}}, etc. Consider moving information associated with the unknown parameter into an appropriate parameter or to a section of the article's talk page for preservation.
Pages with this error are automatically placed in Category:CS1 errors: unsupported parameter.[a]
↑Pages in the Book talk, 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.
