This is a question about Facebook Publisher. When I share a link, Facebook will grab some text, the title an image from the site and construct a preview for the user. The user may then edit the preview, chose from one of several different thumbnails, and then post this to their Facebook profile.
Here's a screenshot to illustrate the point:
How does the Publisher application grab the images and text from the Link? Are there similar applications which work for other popular web applications, any of the Google applications, Wordpress blogs, etc?
I asked a similar question a few months ago, and it appears that Facebook uses oEmbed, but it appears that oEmbed only embeds content. I also read that oEmbed only works with oEmbed providers. The Facebook Publisher works with nearly all websites.