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What are “Community Wiki” posts?

I didn't understand the community wiki at first. So I checked it for all my answers. Is there any way to undo it? And there should be an explanation (tooltip?) under it.

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migrated from stackoverflow.com Oct 31 '10 at 2:25

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marked as duplicate by waiwai933, Jon Seigel, KennyTM, ChrisF, Andreas Bonini Nov 1 '10 at 19:57

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there isn't a way to undo wiki :) –  Evgeny Oct 30 '10 at 6:23
    
A subject for meta, though it will be closed as a duplicate there... –  dmckee Oct 31 '10 at 1:44

1 Answer 1

Community Wiki is permanent and irrevocable.

The tooltip when you hover your mouse over the checkbox is also fairly self-explanatory:

alt text

Community owned posts do not generate any reputation for the owner, have a lower reputation barrier for collaborative editing, and show only a revision history instead of a signature block.

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