For example, there may be categories: VimTip Usage Folding The purpose of the is to allow readers to easily find all tips that relate to using folding in Vim. If a tip concerns folding, it should be in the Folding category (which has the Usage category as its parent). It should not also be in the Usage category, because that would be redundant. An exception is the VimTip category, which is meant to collect all tips. See all categories for a list of all the categories, including some that deal with the rest of the wiki. Categories for Vim tips start at .