This class contains information about a Pharmacy Order, commonly referred to as a prescription. This class is a subtype of the more general Healthcare Order, which describes properties common to all types or Orders – this class adds those properties which are specific to medication orders. It can be said that this represent the prescription from the perspective of the ordering system whereas the Pharmacy Promise represents the prescription from the filling system (i.e., the pharmacy). This class is called Pharmacy Request rather than Pharmacy Order following the HL7 V3 convention to use the term Request instead of Order.