Sigh. I understand that perfectly, and I thought it would be implied that I meant "multiple user-defined namespaces" where I, and the commenter I replied to, typed the shorter "namespaces". Sheesh. Bring the pedantry, eh?

Your vitriol is uncalled for, and since it's only your second comment ever, you should pause a moment to consider whether Hacker News is the community for you (judging by the two comments you've left so far, it isn't; I recommend Reddit for dick jokes and personal attacks on comprehension).