<form title="Hello" header="head.tmpl" footer="foot.tmpl" post-event="say_hello">
    <page name="Name">
        <field id="wibble" type="text" validation="wibble">
            <label>Type "wibble":</label>
        </field>
    </page>

    <lexicon lang="en">
        <entry>
            <base>NOT_WIBBLE</base>
            <trans>You didn't type wibble</trans>
        </entry>
    </lexicon>
</form>