<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>