<http://schema.org/ratingValue>
"5"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.gpspower.net/smartphones-marine-applications/301540-navionics-marine-europe-up-v-2-9-5-hd-vers-2-9-4-a.html?s=8be4b7379ec5f6f95d35b94a326cbb00>