When you post a link on facebook how do they determine what to show in the summary?

Posted by beagleguy on Stack Overflow See other posts from Stack Overflow or by beagleguy
Published on 2010-06-07T19:23:34Z Indexed on 2010/06/07 19:32 UTC
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hi all, just curious when you post a link to facebook they seem to parse out some images and some text regarding that link. Does anyone have a guess as to how they determine what text and images to show?

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