<http://schema.org/ratingValue>
"5"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.gpspower.net/garmin-maps/222795-bluechart-g2-hsa009r-amazon-river-2011-5-v-13-a.html?s=9260d5a2858bfd56a552067b362c74dc>