<attributeGroup name="cellAlign">
    <attribute name="align" use="optional">
        <annotation>
            <documentation>Alignment of text in the cell or column group.</documentation>
        </annotation>
        <simpleType>
            <restriction base="string">
                <enumeration value="left" />
                <enumeration value="center" />
                <enumeration value="right" />
                <enumeration value="justify" />
                <enumeration value="char" />
            </restriction>
        </simpleType>
    </attribute>
    <attribute name="char" type="string" use="optional">
        <annotation>
            <documentation>HTML formatting attribute.</documentation>
        </annotation>
    </attribute>
    <attribute name="charoff" type="string" use="optional">
        <annotation>
            <documentation>HTML formatting attribute.</documentation>
        </annotation>
    </attribute>
</attributeGroup>