<xs:element name="tr">
    <xs:complexType>
        <xs:choice maxOccurs="unbounded">
            <xs:element ref="xhtml:th" />
            <xs:element ref="xhtml:td" />
        </xs:choice>
        <xs:attribute name="id" type="xs:ID" />
        <xs:attribute name="title" type="xs:string" />
        <xs:attribute name="dir">
            <xs:simpleType>
                <xs:restriction base="xs:NMTOKEN">
                    <xs:enumeration value="ltr" />
                    <xs:enumeration value="rtl" />
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
        <xs:attribute ref="xml:lang" />
        <xs:attribute name="align">
            <xs:simpleType>
                <xs:restriction base="xs:NMTOKEN">
                    <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" type="xs:string" />
        <xs:attribute name="charoff" type="xs:string" />
        <xs:attribute name="valign">
            <xs:simpleType>
                <xs:restriction base="xs:NMTOKEN">
                    <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>