Reason: Noun form of the tag that describes an image which has been altered by the artist.
(A related question: the danbooru policy for revised images is to parent the older image to the revised version, right? I'm seeing some revisions being shown as child posts to a much older image and wanted to know if I should fix them or not, e.g. post #349370 and post #998497)
Updated by jxh2154