<http://schema.org/description>
"Vanessa Fox from Google to talk about bots...  The basis is that major SEs bots behave well, they do not all use the same syntax, test your file to make sure you're blocking and allowing what you want"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/006725.html>