What does a wiki do?

Jon Udell created a short movie on the making of a Wikipedia entry: the Heavy Metal Umlaut. I saw it some time ago, and I remember it as a succinct exploration of how a community can build, vandalize and repair a wiki entry.

Wikis are a tricky concept for those who don’t use them regularly; how do people know what to add, how can you trust the information provided, and what happens if anyone can edit? He answers them nicely.

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