-	The number-or-normal values can be either a positive integer or an empty string. This is used for the content of the ensemble element.

<xs:simpleType name="positive-integer-or-empty">
    <xs:annotation>
        <xs:documentation>
        -	The number-or-normal values can be either a positive integer or an empty string. This is used for the content of the ensemble element.
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes="xs:positiveInteger">
        <xs:simpleType>
            <xs:restriction base="xs:string">
                <xs:enumeration value="1" />
                <xs:enumeration value="2" />
                <xs:enumeration value="3" />
                <xs:enumeration value="4" />
                <xs:enumeration value="5" />
            </xs:restriction>
        </xs:simpleType>
    </xs:union>
</xs:simpleType>