<http://schema.org/ratingValue>
"4.0"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.pricegrabber.com/cameras/telescopes++nikon-13-30x50-ed-fieldscope-multicolor-8320-niko144-2/m-17979799/?ut=6b1586ce2a112314>