Re: [navigation] does <dt> label a <dd> that follows it?

perhaps all that is really needed is a single grouping slash 
labeling element, applicable to all list types: UL, OL, and 
DL: 

<dl>
<ll role="aaa:group" aaa:labelledby="#list3term1randxyz">
<dt id="list3term1randxyz">term1</dt>
<dd>remark 1.1</dd>
<dd>remark 1.2</dd>
</ll>
</dl>


<ul>
<ll id="WtP"><em class="bt">Winnie the Pooh</em>

<li><a href="winnie_the_pooh.html"><em class="bt">Winnie the Pooh</em> 
(<acronym title="HyperText Markup Language">HTML</acronym> format)</a>
</li>

<li><a href="winnie_the_pooh.pdf"><em>Winnie the Pooh</em> (<acronym 
title="Portable Document Format (Adobe)">PDF</acronym> format)</a></li>

</ll>

<ll id="WaP"><em class="bt">War and Peace</em>

<li><a href="war_and_peace.html"><em class="bt">War and Peace</em> 
(<acronym title="HyperText Markup Language">HTML</acronym></a></li>

<li><a href="war_and_peace.pdf"><em class="bt">War and Peace</em> 
(<acronym title="Portable Document Format (Adobe)">PDF</acronym></a></li>

</ll>
</ul>