A quantitative value is a numerical interval that represents the range of a certain gr:quantitativeProductOrServiceProperty in terms of the lower and upper bounds for a particular gr:ProductOrService. It is to be interpreted in combination with the respective unit of measurement. Most quantitative values are intervals even if they are in practice often treated as a single point value. Example: a weight between 10 and 25 kilogramms, a length between 10 and 15 milimeters. Compatibility with schema.org: This class is equivalent to http://schema.org/Quantity.