pecification ......................................... <a href="#page-3">3</a>
      <a href="#section-2.1">2.1</a>. Overall conventions ....................................... <a href="#page-3">3</a>
      <a href="#section-2.2">2.2</a>. Data format ............................................... <a href="#page-4">4</a>
      <a href="#section-2.3">2.3</a>. Compliance ................................................ <a href="#page-7">7</a>
   <a href="#section-3">3</a>. References .........................