<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.microsafe.com.br/m2c-00099_licenca-open-microsoft-value-olv-win-svr-for-win-essn-svr-cal-sngl-lic.npn.html?orcl=77>