<xs:element name="equation">
    <xs:complexType>
        <xs:sequence>
            <xs:sequence>
                <xs:choice minOccurs="0" maxOccurs="unbounded">
                    <xs:element ref="docbook:title" />
                    <xs:element ref="docbook:titleabbrev" />
                </xs:choice>
                <xs:element minOccurs="0" ref="docbook:info" />
            </xs:sequence>
            <xs:element minOccurs="0" ref="docbook:alt" />
            <xs:choice>
                <xs:element maxOccurs="unbounded" ref="docbook:mediaobject" />
                <xs:element maxOccurs="unbounded" ref="docbook:mathphrase" />
            </xs:choice>
            <xs:element minOccurs="0" ref="docbook:caption" />
        </xs:sequence>
        <xs:attribute name="role" />
        <xs:attributeGroup ref="docbook:db.common.attributes" />
        <xs:attributeGroup ref="docbook:db.common.linking.attributes" />
        <xs:attribute name="label" />
        <xs:attribute name="pgwide">
            <xs:simpleType>
                <xs:restriction base="xs:token">
                    <xs:enumeration value="0" />
                    <xs:enumeration value="1" />
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
        <xs:attribute name="floatstyle" />
    </xs:complexType>
</xs:element>