Hi David,
Yes, The children could be displayed by using Universal Viewer. But how can I create a navigation bar with below format:
<ul>
<li>Node A</li>
<li>Node B
<ul>
<li>Node B11</li>
<li>Node B12</li>
<li>Node B21</li>
<li>Node B22</li>
</ul>
</li>
</ul>
I added a Header Transformation & Footer Transformation (or First Item Transformation & Last Item Transformation) into the Viewer but it render a incorrect format
<ul>
<li>Node A</li>
<li>Node B</li>
<li>Node B11</li>
<li>Node B12</li>
<li>Node B21</li>
<li>Node B22</li>
</ul>
Item transformation
<li><%# Eval("NodeName") %></li>
Header Transformation
<ul>
Footer Transformation
</ul>
Child nodes were not displayed since using Hierarchical Transformation