Trackback

A trackback is one of three types of linkbacks, methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking, and so referring, to their articles. Some weblog software programs, such as Wordpress, Movable Type, Typo and Community Server, support automatic pingbacks where all the links in a published article can be pinged when the article is published. The term is used colloquially for any kind of linkback.

History

The TrackBack specification was created by Six Apart, which first implemented it in its Movable Type blogging software in August 2002. [ [http://www.movabletype.org/docs/mttrackback.html TrackBack Technical Specification] ] The TrackBack has since been implemented in most other blogging tools. Six Apart started a working group in February 2006 to improve the Trackback protocol with the goal to eventually have it approved as an Internet standard by the IETF. One notable blogging service that does not support trackback is Blogger. Instead, Blogger provides "backlinks" [ [http://www.consumingexperience.com/2005/10/blogger-backlinks-feature-not-quite.html Blogger: backlinks feature (not quite trackback) - A Consuming Experience ] ] , which allow users to employ Google's search infrastructure to show links between blog entries.

Function

A trackback is an acknowledgment. This acknowledgment is sent via a network signal (ping) from the originating site to the receiving site. The receptor often publishes a link back to the originator indicating its worthiness. Trackback requires both sites to be trackback-enabled in order to establish this communication. Trackback does not require the originating site to be physically linked to the receiving site.

Trackbacks are used primarily to facilitate communication between blogs; if a blogger writes a new entry commenting on, or referring to, an entry found at another blog, and both blogging tools support the TrackBack protocol, then the commenting blogger can notify the other blog with a "TrackBack ping"; the receiving blog will typically display summaries of, and links to, all the commenting entries below the original entry. This allows for conversations spanning several blogs that readers can easily follow.

oftware support

Blogging software that supports the TrackBack protocol displays a "TrackBack URL" with every entry. This URL is used by the commenting blogger, whose software will send XML-formatted information about the new entry to this URL. Some blogging tools are able to discover these TrackBack URLs automatically, others require the commenting blogger to enter them manually.

pam

Some individuals or companies have abused the TrackBack feature to insert spam links on some blogs. This is similar to comment spam but avoids some of the safeguards designed to stop the latter practice. As a result, TrackBack spam filters similar to those implemented against comment spam now exist in many weblog publishing systems. Many blogs have stopped using trackbacks because dealing with spam became too much of a burden.

ee also

*Linkback, the suite of protocols that allows websites to manually and automatically link to one another
*Pingback, a similar protocol less prone to spam
*Refback, another similar protocol
*Referrer, identifies the address of the webpage of the resource which links to it
*Search engine optimization
*Sping, short for 'spam ping'

References

External links

* [http://www.sixapart.com/pronet/docs/trackback_spec Official specification]
* [http://www.lifewiki.net/trackback/ Trackback Working Group wiki]
* [http://www.plasticbag.org/archives/2003/03/what_is_trackback_part_one.shtml What is Trackback?] by Tom Coates
* [http://www.kdays.com/2008/01/28/the-ultimate-trackback-help-guide/ The Ultimate Trackback Help Guide]
* [http://seclab.cs.rice.edu/proj/trackback/ Trackback Validator Plugin for WordPress] : Trackback spam blocker
* [http://tools.pingates.com/trackback/ Test Trackback]
* [http://smartspammers.com/trackback-spa/ Trackback Spam] An example of how trackback spam is carried out
* [http://www.trackbackr.com/ TrackBackr] JS Trackback system with integrated spam blocker
* [http://www.waldospost.com/ping/index.php Blog Ping Software] Free Blog Pinging Service