<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/dlink-dwr116-n300-router-wifi-80211n-3g-lte-300mbits-1x-wan-4x-lan-10100-wps-aes-wpa2+dp204980/>