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 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 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 (seeSpecial:TrackingCategories for an overview of the latter).
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This category may be empty occasionally or even most of the time.
This category isnot shown on its member pages unless the appropriateuser preference (Appearance → Show hidden categories) is set.
This category contains pages that contains citations to papers witherrata that have beenchecked (that is, the errata have been checked to eithernot affect the cited material, or the article has beenupdated to reflect the issued corrections). It is populated by{{erratum}}. If a paper has no erratum, remove the{{erratum}} template.