<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/hp-250-g4-156quot-hd-intel-core-i55200u-22ghz-8gb-1tb-intel-hd-hdmi-dvdrw-win10-cerna+dp258525/>