<xs:element name="colgroup">
    <xs:complexType>
        <xs:sequence>
            <xs:element minOccurs="0" maxOccurs="unbounded" ref="docbook:col" />
        </xs:sequence>
        <xs:attributeGroup ref="docbook:db.common.attributes" />
        <xs:attribute name="class" />
        <xs:attribute name="style" />
        <xs:attribute name="title" />
        <xs:attribute name="lang" />
        <xs:attribute name="onclick" />
        <xs:attribute name="ondblclick" />
        <xs:attribute name="onmousedown" />
        <xs:attribute name="onmouseup" />
        <xs:attribute name="onmouseover" />
        <xs:attribute name="onmousemove" />
        <xs:attribute name="onmouseout" />
        <xs:attribute name="onkeypress" />
        <xs:attribute name="onkeydown" />
        <xs:attribute name="onkeyup" />
        <xs:attribute name="span" type="xs:NMTOKEN" />
        <xs:attribute name="width" />
        <xs:attribute name="align">
            <xs:simpleType>
                <xs:restriction base="xs:token">
                    <xs:enumeration value="left" />
                    <xs:enumeration value="center" />
                    <xs:enumeration value="right" />
                    <xs:enumeration value="justify" />
                    <xs:enumeration value="char" />
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
        <xs:attribute name="char" />
        <xs:attribute name="charoff" />
        <xs:attribute name="valign">
            <xs:simpleType>
                <xs:restriction base="xs:token">
                    <xs:enumeration value="top" />
                    <xs:enumeration value="middle" />
                    <xs:enumeration value="bottom" />
                    <xs:enumeration value="baseline" />
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
    </xs:complexType>
</xs:element>