<http://schema.org/description>
"This helpful Guide provides assistance to anyone who requires reference concerning the manner in which anything in the world is weighed, measured, or described. Conversions between the Imperial and Metric systems are provided in convenient chart form; other scales such as UV index, wind chill, and healthy body temperature ranges are converted to useful chart format."^^<http://www.w3.org/2001/XMLSchema#string>
<http://permacharts.com/products/weights-measures>