<xs:simpleType name="PurchasePriceType" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:restriction base="xs:string"> <xs:enumeration value="NotSpecified" /> <xs:enumeration value="PurchaseUnit" /> <xs:enumeration value="PurchaseContentUnit" /> <xs:enumeration value="ConsumerUnit" /> </xs:restriction> </xs:simpleType>