<http://schema.org/availability>
"http://schema.org/PreOrder"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.jameco.com/1/1/4390-he3321a0400-reed-relays-5vdc-500-ohm-0-5a-spst-no-24-13x7x7-4-mm-tht-dry.html>