<http://schema.org/availability>
"http://schema.org/InStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.pfister.ch/fr/produktdetail/7908975/Catalogue/Accessoires-d%C3%A9coratifs-%26-d%C3%A9coration/Emballages-cadeaux/Sachet>