From Collaborative RCE Knowledge Library
Adding an Item to a Category That Does Not Yet Exist
(aka Requesting a New Category)
It is obvious that noone can possibly predict or enumerate all possible categories that would be suitable for describing and, well, categorizing, all possible RCE knowledge items. This goes for the administrators of this site too (who are the only ones that can modify or otherwise manipulate the category structure of the library), and thus, there will arise situations where you are sitting there with a really great item, but cannot find any single category to submit it to in the entire existing category hierarchy (or, alternatively, can only find some of the categories that you think a item should belong to, but not all).
But fear not! This is exactly what the "Needs New Category" category is for! Once you go there, you will find detailed descriptions about how to make good use of it in these situations.