<http://schema.org/availability>
"http://schema.org/OutOfStock"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.der-schweighofer.de/artikel/121427/luftschraube_fuer_f4u_corsair_v3_artf_1430_mm_und_p-47_1400mm_fms>