<xsd:attribute name="shiftPeriod">
    <xsd:annotation>
        <xsd:documentation> Numeric values conform to: ISO 8601 2nd Edition; ISO8601:2000(E); pub 2000-12-15, Data elements and interchange formats,  Information interchange,  Representation of dates and times,  http://www.iso.ch/cate/d26780.html/ 

				</xsd:documentation>
        <xsd:documentation>1 = Monday, 2 = Tuesday, 3 = Wednesday, 4 = Thursday, 5 = Friday, 6 = Saturday, 7 = Sunday</xsd:documentation>
    </xsd:annotation>
    <xsd:simpleType>
        <xsd:restriction base="xsd:string">
            <xsd:enumeration value="monthly" />
            <xsd:enumeration value="weekly" />
            <xsd:enumeration value="daily" />
            <xsd:enumeration value="1" />
            <xsd:enumeration value="2" />
            <xsd:enumeration value="3" />
            <xsd:enumeration value="4" />
            <xsd:enumeration value="5" />
            <xsd:enumeration value="6" />
            <xsd:enumeration value="7" />
            <xsd:enumeration value="event" />
        </xsd:restriction>
    </xsd:simpleType>
</xsd:attribute>