<http://schema.org/availability>
"http://schema.org/OutOfStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.outdoorweb.cz/Lyzovani/Lyzarske-kalhoty/damske-36644/NBWP2029B-XHN-Technicke-zimni-damske-kalhoty>