<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/oki-mb472dnw-multifunkcni-led-tiskarna-a4-33-strmin-1200x1200-duplex-wifi-lan-usb+dp226132/>