Java JAXB xml pojo classes

How can I create the POJO classes with JAXB with such a xml structure :

<principale>
   <procedure>
      <procedure>
         <param1>value1</param1>
         <param2>value2</param2>
      </procedure>
      <procedure>
         <param1>value3</param1>
         <param2>value4</param2>
      </procedure>
   </procedure>
</principale>

As you can see the first procedure tag is not the root one and is the same than the second procedure tag.