<h2>Namespaces</h2>
 <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#nslist" aria-expanded="false" aria-controls="nsList">
    Expand/Collapse
</button>
<div class="collapse" id="nslist">
    <div class="card card-body">
        <table class="table table-striped">
            <thead>
                <tr>
                    <td>Prefix</td>
                    <td>URI</td>
                </tr>
            </thead>
            <tbody>
            {% for ns in nsm.namespaces() | sort %}
                <tr>
                    <td>{{ ns[0] }}</td>
                    <td>{{ ns[1] }}</td>
                </tr>
            {% endfor %}
            </tbody>
        </table>
    </div>
</div>