I wonder how this works, since the 'Attribution' required was a clause added at some point AFTER the initial data dumps, does this mean all content before that date can be used w/o attribution?

(note: I am not using the data at all, just curiuos).

  • Was it added afterwards?
    – Pekka
    Aug 12, 2010 at 15:53
  • 7
    If I am not mistaken, that clause was always there. It just wasn't clarified until June of '09.
    – mmyers
    Aug 12, 2010 at 15:53
  • i think it was added.
    – Blankman
    Aug 12, 2010 at 15:55
  • 1
    Attribution required was set before the site even started. Jeff had a blog post about it. Aug 12, 2010 at 16:07

1 Answer 1


The CC license pre-dates the data dump.

Now Licensed Under Creative Commons - Posted by Jeff Atwood on May 5th, 2008

Stack Overflow Creative Commons Data Dump - Posted by Jeff Atwood on June 4th, 2009


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