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