I'm trying to use MedicinalProductDefinition to define the marketing, authorization and ingredients of a product. It is a single part product. It appears that I have to specify the following attributes and use the following chain of resources to express this:\\MedicinalProductDefinition
-combinedPharmaceuticalDoseForm (put the form here?)
-packagedMedicinalProduct => PackagedProductDefinition

PackagedProductDefinition\\-packageItem
--type (mandatory)
--quantity (mandatory) (put 1 because this is a 'top-level' packaging?)
--manufacturedItem => ManufacturedItemDefinition

ManufacturedItemDefinition
-manufacturedDoseForm (mandatory, so put the form here as well?)
-quantity (mandatory)
-ingredient => Ingredient

That seems slightly convoluted, but I can work with that except for the mandatory elements I can default the quantities to 1, but I don't have a packaging type. Maybe we want to reduce the cardinalities of these attributes?