xquery version "1.0";

let $var_number := 1234
let $var_text   := "Some text"
let $var_node   := <my_var_node>The node content</my_var_node>


return

   <output>
      <number>{ $var_number }</number>
      <text>{ $var_text }</text>
      <nodeComplet>{ $var_node }</nodeComplet>
      <nodeContent>{ fn:data($var_node) }</nodeContent>
   </output>