<xsd:element name="thead">
    <xsd:complexType>
        <xsd:sequence>
            <xsd:element ref="tr" minOccurs="0" maxOccurs="unbounded" />
        </xsd:sequence>
        <xsd:attributeGroup ref="LinkSupport" />
        <xsd:attribute name="align">
            <xsd:simpleType>
                <xsd:restriction base="xsd:NMTOKEN">
                    <xsd:enumeration value="left" />
                    <xsd:enumeration value="center" />
                    <xsd:enumeration value="right" />
                    <xsd:enumeration value="justify" />
                    <xsd:enumeration value="char" />
                </xsd:restriction>
            </xsd:simpleType>
        </xsd:attribute>
        <xsd:attribute name="char" type="xsd:string" />
        <xsd:attribute name="charoff" type="xsd:string" />
        <xsd:attribute name="valign">
            <xsd:simpleType>
                <xsd:restriction base="xsd:NMTOKEN">
                    <xsd:enumeration value="top" />
                    <xsd:enumeration value="middle" />
                    <xsd:enumeration value="bottom" />
                    <xsd:enumeration value="baseline" />
                </xsd:restriction>
            </xsd:simpleType>
        </xsd:attribute>
    </xsd:complexType>
</xsd:element>