TrackBack was first released in August 2002 by the creators of MovableType, and since then, the product has gained popularity among the blogging community (or "blogosphere"). TrackBack is a relatively new framework for peer-to-peer communication and notifications between Websites. With TrackBack, sites can communicate about similar interests and resources.
Although originally developed as a blogger-only tool, TrackBack has recently started to enjoy popularity among regular content sites, such as O’Reilly. In this article, I’ll give you a short description of the possible uses of TrackBack, how it works (I won’t actually dive into the code), the advantages and disadvantages of the product, and finally a conclusion, including resources that can help you to implement TrackBack in your own sites.
What is TrackBack?
TrackBack is an API that enables Websites to communicate about similar interests and resources.
Let’s imagine you run a Weblog, and you write an interesting post. Your friend, who also has a blog, wants to comment on your post. Instead of him making the comment within your blog, he simply posts the comments on his own Weblog and sends a TrackBack "ping" to your site. You are then be notified of the comments on your entry, and surf off to check out your friend’s post. You may then decide to comment on your friend’s comments. The discussion goes on. As such, TrackBack can be used as a discussion board, between different Websites and people.
A few examples of TrackBack being used in the way I’ve just described are: