<xsd:element name="WBSMask" minOccurs="0" maxOccurs="unbounded">
    <xsd:annotation>
        <xsd:documentation>The WBS Mask that is applied to all tasks in the Project.</xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:sequence>
            <xsd:element name="Level" type="xsd:integer">
                <xsd:annotation>
                    <xsd:documentation>The level of the mask.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
            <xsd:element name="Type">
                <xsd:annotation>
                    <xsd:documentation>The type of the node value.  The values are: 0=Numbers, 1=Uppercase Letters, 2=Lowercase 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:string">
                <xsd:annotation>
                    <xsd:documentation>The maximum length in characters.  This element is omitted when length is "any".</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
            <xsd:element name="Separator" type="xsd:string">
                <xsd:annotation>
                    <xsd:documentation>The separator character of the node.</xsd:documentation>
                </xsd:annotation>
            </xsd:element>
        </xsd:sequence>
    </xsd:complexType>
</xsd:element>