stats flags

[DragonRyder]

/stats Z
I need help, it deals with /stats Z. in my debug window i see this: raw 249 Ryu :Total: ww 752000 ch 62117 cl 347129 co 0 db 3027532
what do the letters: ww ch cl co db mean?
i believe the numbers after the letters are bytes, is that correct?
and i ask cause i am writing a script to show this in a stats window - and its for irc admin use
and as far as i understood it, stats flags was part of unrealircd