<http://schema.org/target>
"http://www.audible.com/search?advsearchKeywords={search_term_string}"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.audible.com/pd/Radio-TV/BBC-Newshour-September-10-2012-Audiobook/B008D4E2M2?ref_=cat_11>