I recently noticed that the madskills.com domain is no longer available/is in a parked state. For those who are not aware, the 'official' specification for Pingback Module for RSS 1.0/2.0 and Trackback Module for RSS 1.0/2.0 was hosted on this domain. I am not sure if this will be rectified in the future, but as a service to the community I have decided to host these RSS extension specifications on my domain.

I have restored the original documentation for these two syndication extensions using URI's that were as close as possible to the original syndication XML namespaces, which was also the specification documentation.  This is in no way an attempt to change the XML namespace declarations, I am only hosting the extension specification documentation that is no longer readily available.

To find the documentation for http://madskills.com/public/xml/rss/module/pingback/, you can go to http://oppositionallydefiant.com/public/xml/rss/module/pingback/.

To find the documentation for http://madskills.com/public/xml/rss/module/trackback/, you can go to http://oppositionallydefiant.com/public/xml/rss/module/trackback/.

I hope that this post and the content it points to will be found useful for developers looking for the documentation for these syndication extensions.

[Update: It looks like the original documentation is now back online, but I will leave this post just in case the original documentation disappears again.]