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Possible Duplicate:
Twitter Product Preview on Tweets

So I just saw the tweet below and was wondering, how does amazon get the extra information into the tweet?

amazon tweet

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marked as duplicate by Su', paulmorriss, John Conde Jul 27 '12 at 13:52

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Flagging for move; likely belongs at webapps.se. – Su' Jul 27 '12 at 9:54
@Su' The question I flagged it as duplicate with specifically mentions Amazon. For some reason the tweet it linked to doesn't display product data any more, and we have no screenshot. I think "it's transclusion" doesn't quite answer this question, so I'll add more to the answer there. – paulmorriss Jul 27 '12 at 11:40
@paulmorriss Erm, yeah. You'll have seen by now I deleted that comment. I glossed some stuff. Twitter seem determined to complicate this. (Note j0k's answer beyond even that.) Still, I'd assume there has to be some difference, with there being a good year and a half between the two announcements. More digging needed, I guess. – Su' Jul 27 '12 at 11:43

That's an expanded tweet. They have partnerships with various companies to display more detailed information from them. The actual update is still just the bit above from Ben and stops at the reply, favorite, etc. buttons. The stuff below is injected by Twitter.

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This is also related to Twitter Cards which is available for only few web sites at the moment.

The goal is to have expanded tweet from trusted sites to give a better user experience (à la Facebook).

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