Wikipedia:Categorization/Naming

This consensus. When in doubt, discuss first on the talk page .

When naming a category, one should be particularly careful and choose its name accurately. Moving non-conventionally categorized pages to another category name (see {{

General conventions

• Names of
  topic categories should be singular, normally corresponding to the name of a Wikipedia article. Examples: "Law", "France", "Hillary Clinton
  ".
• Names of
  set categories should be plural. Examples: "Writers", "Villages in Poland
  ".
• Note that in many instances a topic category and a set category have similar names, the topic category being singular and the set category plural. For example, Opera is a topic category (containing all articles relating to the topic), while Operas is a set category (containing articles about specific operas). Be careful to choose the right one when categorizing articles.
• Do not write the category structure in names. Example: "Monarchs", not "People – Monarchs". This includes creating categories that are subpages of other categories.
• Choose category names that can stand alone, independent of the way a category is connected to other categories. Example: "Geography terminology stubs", not "Terminology" (a subcategory of "Geography stubs").

Categories for articles

• Standard article
  sentence case, do not use title case. Specifically, do not capitalize
  regular nouns except when they come at the beginning of the category name.
• When naming, use words and phrases which exist in
  reliable sources (particularly for technical subjects
  ), so that those sources may be used to support inclusion of information.
• Avoid abbreviations. Example: "Category:Military equipment of World War II", not "Category:Military equipment of WW2". However, acronyms that have become the official, or generally used, name (such as NATO) should be used where there are no other conflicts. Exceptions to this should be explained in the category description.
• Avoid subjective adjectives such as famous, large, or beautiful in category titles.
• When a topic requires
  eponymous category
  .
• If there are more than a few
  sort key that excludes the phrase "List of" (otherwise all lists would appear under "L"). See also Category:Lists
  .
• Naming guidelines for sub-categories of
  Wikipedia:WikiProject Stub sorting/Naming guidelines#Categories
  .

• Categories used for Wikipedia administration, are disambiguated by prepending with the word "Wikipedia" (no colon) if this is needed to prevent confusion with content categories. For example, Category:Inactive project pages (where no confusion is likely), but Category:Wikipedia tools (as distinct from the content category Tools).
• All WikiProject categories should have "WikiProject" (or "WikiProjects") as part of the name. Note that this does not apply to the names of categories that projects might create for the use of assessments. In these cases, the advice given in Project Categories, which conforms to Category:Wikipedia 1.0 assessments is advised, though not mandatory.
• For geographical photo requests, the category name should be "Wikipedia requested photographs in xxx" as in [[Category:Wikipedia requested photographs in England]]; see Category:Wikipedia requested photographs by location.
• For categorization in userspace, see Wikipedia:Categorization#User namespace and Wikipedia:User categories#Naming conventions.