Relação das UFs brasileiras, sendo "NI" = Não informado.

<xs:simpleType name="UF">
    <xs:annotation>
        <xs:documentation>Relação das UFs brasileiras, sendo "NI" = Não informado.</xs:documentation>
    </xs:annotation>
    <xs:restriction base="xs:string">
        <xs:enumeration value="SC" />
        <xs:enumeration value="PR" />
        <xs:enumeration value="RS" />
        <xs:enumeration value="SP" />
        <xs:enumeration value="MS" />
        <xs:enumeration value="MT" />
        <xs:enumeration value="MG" />
        <xs:enumeration value="RJ" />
        <xs:enumeration value="ES" />
        <xs:enumeration value="BA" />
        <xs:enumeration value="PE" />
        <xs:enumeration value="AC" />
        <xs:enumeration value="AP" />
        <xs:enumeration value="AM" />
        <xs:enumeration value="DF" />
        <xs:enumeration value="GO" />
        <xs:enumeration value="PI" />
        <xs:enumeration value="MA" />
        <xs:enumeration value="PA" />
        <xs:enumeration value="RO" />
        <xs:enumeration value="RR" />
        <xs:enumeration value="TO" />
        <xs:enumeration value="AL" />
        <xs:enumeration value="CE" />
        <xs:enumeration value="PB" />
        <xs:enumeration value="RN" />
        <xs:enumeration value="SE" />
        <xs:enumeration value="NI" />
    </xs:restriction>
</xs:simpleType>

• UF
• nsS:uf