Heh, you're right, it does look pretty similar. I wasn't aware of that article until someone posted it on Disqus comments just now. The article came out of my

Heh, you're right, it does look pretty similar. I wasn't aware of that article until someone posted it on Disqus comments just now. The article came out of my reading the data mining slides from the Ullman - Stanford course, maybe there's common terminology? I know I tried to keep it consistent with the wikipedia Jaccard Index.