<xs:simpleType name="OutboundMessageStatus" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:restriction base="xs:string"> <xs:enumeration value="NotSpecified" /> <xs:enumeration value="New" /> <xs:enumeration value="Sent" /> <xs:enumeration value="Failure" /> <xs:enumeration value="Unknown" /> </xs:restriction> </xs:simpleType>