July 21, 2018
Replied to a post on twitter.com :
@HowellsMead For those familiar, it may be a useful shorthand, but it simplifies things too far. Webmention uses knowledge of prior history and abuses of Trackback/Pingbacks/Refbacks and improves on them. Cross reference: https://indieweb.org/Webmention-developer and https://indieweb.org/Vouch