<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/adata-xpg-z1-16gb-dimm-ddr4-2666mhz-cl16-12v-kit-2x8gb-cerveny-chladic+dp296789/>