What is the _UID used for in Cappuccino?

It's used in dozens of places, which you could see by doing something like "git grep UID" on the source code. Most often it is used as a hash key. Also, it's spelled "Cappuccino.

Thanks for the correction. – Richard Durr Dec 14 '10 at 15:45 Why the downvote, downvoter? – d11wtq Dec 20 '10 at 12:28.

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