<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/intel-xeon-e31220-v5-30ghz-tb-35ghz-4c4t-256kb-1024kb-8mb-1151-skylake-80w+dp271569/>