The value of the quantitative value or property value node. - For [QuantitativeValue](http://schema.org/QuantitativeValue) and [MonetaryAmount](http://schema.org/MonetaryAmount), the recommended type for values is 'Number'. - For [PropertyValue](http://schema.org/PropertyValue), it can be 'Text;', 'Number', 'Boolean', or 'StructuredValue'. - Use values from 0123456789 (Unicode 'DIGIT ZERO' (U+0030) to 'DIGIT NINE' (U+0039)) rather than superficially similiar Unicode symbols. - Use '.' (Unicode 'FULL STOP' (U+002E)) rather than ',' to indicate a decimal point. Avoid using these symbols as a readability separator.