The assertEquals command can currently be used on any HTML element.
There are currently no checks.
However, you should avoid using the command on elements that cannot legally
have a <span> child (e.g. <table>,
<tr>, <ul>, <ol>).
All of these will work:
<span concordion:assertEquals="#name">Fred</span>
<strong concordion:assertEquals="#name">Fred</strong>
<div concordion:assertEquals="#name">Fred</div>
<table>
<tr>
<td concordion:assertEquals="#name">Fred</td>
</tr>
</table>