<?xml version="1.0" encoding="utf-16"?>
<xs:simpleType name="ContentRegionUnitWKV">
    <xs:restriction base="xs:NMTOKEN">
        <xs:enumeration value="Other" />
        <xs:enumeration value="Unknown" />
        <xs:enumeration value="TenThousandthsOfInches" />
        <xs:enumeration value="Micrometers" />
        <xs:enumeration value="Pixels" />
        <xs:enumeration value="Percent" />
    </xs:restriction>
    <!-- marker supply capacity/level unit -->
    <!-- see PrtMarkerSuppliesSupplyUnitTC in [RFC3805] -->
</xs:simpleType>