<?xml version="1.0" encoding="utf-16"?> <xs:simpleType name="ModulationWKV"> <xs:restriction base="xs:NMTOKEN"> <xs:enumeration value="PhaseShiftKeying" /> <xs:enumeration value="QuadratureAmplitudeModulation" /> <xs:enumeration value="TrellisModulation" /> </xs:restriction> </xs:simpleType>