Data Dump - Posts.xml — 'score'

Browsing through the data dump, I have found a column named 'score'. From what I can tell it is simply restricted to being an integer value. My guess is that it's the sum of upvotes - downvotes, however I'd like to be sure.

What exactly is it, and if possible, how is it calculated (if not already obvious)?

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Yes, score = upvotes - downvotes. I don't know why the individual upvote and downvote counts aren't included, but you may be able to reconstruct them from the votes table if you need to.
I believe that the score is only being denormalized because that is what is showed in any given page. Upvotes and downvotes are only relevant when "auditing". –  perbert Nov 7 '09 at 21:42