<http://schema.org/keywords>
"Fiction, Media Tie-In, Science-Fiction, Action & Adventure, Aliens, Space Exploration, Space Fleet, Space Marine"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.simonandschuster.com/books/Bloodletter/K-W-Jeter/Star-Trek-Deep-Space-Nine/9780743412223>