<T3DataStructure>
    <sheets>
        <sDEF>
            <ROOT>
                <sheetTitle>Options</sheetTitle>
                <type>array</type>
                <el>
                    <settings.backPID>
                            <exclude>1</exclude>
                            <label>Back page</label>
                            <config>
                                <type>group</type>
                                <allowed>pages</allowed>
                                <size>1</size>
                                <maxitems>1</maxitems>
                                <minitems>0</minitems>
                                <show_thumbs>1</show_thumbs>
                        </config>
                    </settings.backPID>
                </el>
            </ROOT>
        </sDEF>
        <sTemplate>
            <ROOT>
                <sheetTitle>Template</sheetTitle>
                <type>array</type>
                <el>
                    <settings.template>
                        <exclude>1</exclude>
                        <label>Layout option</label>
                        <config>
                            <type>select</type>
                            <items type="array">
                                <numIndex index="0" type="array">
                                    <numIndex index="label">Default</numIndex>
                                    <numIndex index="value">default</numIndex>
                                </numIndex>
                                <numIndex index="1" type="array">
                                    <numIndex index="label">Custom</numIndex>
                                    <numIndex index="value">costum</numIndex>
                                </numIndex>
                            </items>
                            <default>default</default>
                        </config>
                    </settings.template>
                </el>
            </ROOT>
        </sTemplate>
    </sheets>
</T3DataStructure>