<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/kompatibilni-toner-safeprint-cartr-t-cerna-pro-canon-fax-l380-l390-l400-pcd-320-340+dp154590/>