There's no documentation for this item.
Source Code
# File rss/trackback.rb, line 14 def trackback_validate(ignore_unknown_element, tags, uri) return if tags.nil? if tags.find {|tag| tag == "about"} and !tags.find {|tag| tag == "ping"} raise MissingTagError.new("#{TRACKBACK_PREFIX}:ping", tag_name) end end
<code/>and<pre/>for code samples.