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Template:Deprecated/doc
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Deprecated items are items that should not be used anymore. If an item (a category page, an article page, an extras page, a help page, a template page, a file page, ...) should be deleted, please use the {{discarded}} template instead.
To categorize an item as Category:Deprecated items you just use the template tag {{deprecated|Reason for deprecation and/or description of replacement item}} in the item's (a category page, an article page, an extras page, a help page, a template page, a file page, ...) page, where "Reason for deprecation and/or description of replacement item" is a short explanation.