Is there any way to distinguish between categories like History, or Literature for example, and what I would think of as categories that are used for internal housekeeping like "Unprintworthy_redirects" or "Nonindexed_pages"?  They're not hidden categories, but conceptually there is a clear difference between housekeeping categories and categories that define fields of knowledge.  But is there anything in the tables that distinguishes them?

Thanks,

Robert