>unused</span></code>.
            In this case, the <code class="computeroutput"><span class="identifier">duplicate</span><span class="special">[]</span></code> directive exposes the attribute type
            of its first element. The behavior of the <code class="computeroutput"><span class="identifier">duplicate</span><span class="special">[]</span></code> directive is undefined if the elements
            of an embedded sequence do not expose the same attributes. Most likely,
            the correspondi