Index of /specs/pingback

      Name                    Last modified      Size  Description
Parent Directory - translations/ 11-Mar-2013 11:03 - The pingback specification in different languages pingback-1.0-notes 24-Sep-2002 06:57 85 Pingback 1.0 Specification pingback-0.9 10-Mar-2003 06:15 18K Pingback 0.9 pingback-0.9.1 10-Mar-2003 06:15 24K Pingback 0.9.1 pingback-0.9.2 10-Mar-2003 06:15 24K Pingback 0.9.2 pingback-0.9.3 10-Mar-2003 06:15 25K Pingback 0.9.3 pingback 11-Mar-2013 11:04 26K The latest version of the pingback specification pingback-1.0 11-Mar-2013 11:04 26K Pingback 1.0 Specification
Why pingback? Why not referrers?

Referrers are very noisy (spiders include bogus referrers, people come to
sites with only subtly different referrers such as a trailing slash or no
trailing slash, etc); referrers don't give you the permalink of the
originating resource; referrers contain many links from news aggregators,
blog rolls, search engines and other pages which do not contain comments
on the post.

Pingbacks are reliable because they are explicitly requested; pingbacks
have a near perfect signal:noise ratio because they are only triggered by
pages that actually link to the post with comments; the pingback mechanism
is easily extended to provide services such as pingback listing (when a
site asks another for the list of pingbacks).