<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/ubnt-unifi-ap-ac-vnitrni-ap-24ghz-450mbps-5ghz-1300mbps-122m-pasivni-poe+dp230166/>