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  • john eischen thinks this is interesting:

The xAPI specification is based on the concept of tracking activity streams. This is a method used by many popular social media sites. An activity stream is, essentially, a log of the interactions a person has with a site or application, such as visiting a page, typing text, selecting an item from a list, or clicking a button. Activity streams are also able to track the context of each of these interactions. What text did the user type into which field on what page? An activity stream can also roll up a group of interactions into a higher-order activity, such as completing a form or participating in an online discussion.