Sponging :  disallowed (Read-only view)
qrcode_icon
http://purl.org/goodrelations/v1#addOn

This property points from a gr:Offering to additional offerings that can only be obtained in combination with the first offering. This can be used to model supplements and extensions that are available for a surcharge. Any gr:PriceSpecification attached to the secondary offering is to be understood as an additional charge.