<syntaxhighlight lang="xml">
<<response>> <<title>>Hello World!<</title>><</response>>
</syntaxhighlight>
$agent as xs:string*
) as element(response) {
<<response type='form'>> <<message>>{ $message }<</message>> <<user-agent>>{ $agent }<</user-agent>> <</response>>
};
</syntaxhighlight>