I recently added extreme-programming as a synonym for xp. However, it seems that it should really be the other way around, e.g. that extreme-programming is the canonical name to which the abbreviation xp should point.
However, the system doesn't allow me to do this. Perhaps one needs a cape and super-powers—or at least diamond-moderator privileges—to do this. If that's the case, I'd like the request that someone with the appropriate super-hero costume make the necessary changes.