<http://schema.org/description>
"As I reported at Search Engine Land, Apple mobile Safari in iOS 7 and in some cases, other iOS versions, is showing more referrer data now than it did prior.  Back in the day, Apple for some reason st"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/ios-referrer-google-not-provided-17184.html>