<xsd:element name="Mask" minOccurs="0" maxOccurs="unbounded">
    <xsd:annotation>
        <xsd:documentation>The four elements of the mask constitute the format in which the outline code must appear.</xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:sequence>
            <xsd:element name="Level" type="xsd:integer" minOccurs="0">
                <xsd:annotation>
                    <xsd:documentation>The level of the mask.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
            <xsd:element name="Type" minOccurs="0">
                <xsd:annotation>
                    <xsd:documentation>The type of mask. Values are: 0=Numbers, 1=Upper Case Letters, 2=Lower Case Letters, 3=Characters</xsd:documentation>
                </xsd:annotation>
                <xsd:simpleType>
                    <xsd:restriction base="xsd:integer">
                        <xsd:enumeration value="0" />
                        <xsd:enumeration value="1" />
                        <xsd:enumeration value="2" />
                        <xsd:enumeration value="3" />
                    </xsd:restriction>
                </xsd:simpleType>
            </xsd:element>
            <xsd:element name="Length" type="xsd:integer" minOccurs="0">
                <xsd:annotation>
                    <xsd:documentation>The maximum length in characters of the outline code values.  If length is any, the value is zero.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
            <xsd:element name="Separator" type="xsd:string" minOccurs="0">
                <xsd:annotation>
                    <xsd:documentation>The separator value of the code values.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
        </xsd:sequence>
    </xsd:complexType>
</xsd:element>