<http://schema.org/description>
"Tuesday we reported that Google quietly dropped the ~tilde operator due to lack of use.The operator helped searches find synonymous, a form of expanding your query.  It was primarily used by librarian"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/tilde-google-saves-space-16994.html>