<configuration xmlns="http://www.s60.com/xml/confml/2" name="Example Configuration" version="2.91.0" xmlns:custom="...">
    <extensions>
        <custom:something/>
    </extensions>
    <feature ref="ExampleFeature" name="Example Feature Settings" custom:foo="3">
        <desc>This is the description for the feature. It can be used for display purposes.</desc>
        <setting ref="setting1" name="Setting 1" type="int" readOnly="false" custom:bar="1">
            <extensions>
                <custom:something>foo</custom:something>
            </extensions>
            <desc>The first setting</desc>
        </setting>
    </feature>
</configuration>