optional, single

—

Inside <issuedate> the date of issue of a level is given.

<certification>

<date>

<certification>

(see also <certification>)

<issuedate>
    <date>
        <year>2003</year><month>3</month><day>2</day><dayofweek>7</dayofweek> <!-- Sunday -->
    </date>
</issuedate>