additionalProperty constant
additionalProperty [Expects: http://schema.org/PropertyValue]
A property-value pair representing an additional characteristic of the entity, e.g. a product feature or another characteristic for which there is no matching property in schema.org.\n\nNote: Publishers should be aware that applications designed to use specific schema.org properties (e.g. http://schema.org/width, http://schema.org/color, http://schema.org/gtin13, ...) will typically expect such data to be provided using those properties, rather than using the generic property/value mechanism.
Can be used on: http://schema.org/MerchantReturnPolicy, http://schema.org/Offer, http://schema.org/Place, http://schema.org/Product, http://schema.org/QualitativeValue, http://schema.org/QuantitativeValue
Implementation
static const additionalProperty = IriTerm.prevalidated(
'http://schema.org/additionalProperty',
);