<http://schema.org/availability>
"http://schema.org/PreOrder"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.jameco.com/1/1/41382-he721a0500-reed-relays-5vdc-500-ohm-0-5a-spst-no-19-5x9-52x5-5-mm-tht-dry.html>