<http://schema.org/description>
"A WebmasterWorld thread has several webmasters complaining about how Yahoo Search handles 404s.  There  is a really good analysis by Frank Rizzo, a senior member from 2002 at WebmasterWorld, who shows"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/022418.html>