<tmpl_if attachment_loop>
    <div class="attachments">
    <ul>
    <tmpl_loop attachment_loop>
        <li>
        <a href="<tmpl_var url>"><img src="<tmpl_var iconUrl>" alt="<tmpl_var filename>" class="wg-icon" /></a>
        <a href="<tmpl_var url>"><tmpl_var filename></a>
        </li>
    </tmpl_loop>
    </ul>
    </div>
    <!--/attachments-->
</tmpl_if>

The attachment loop in an article.