o&gt; can be either:</p>
</div>
<div class="dlist">
<dl>
<dt class="hdlist1"><em>unspecified</em></dt>
<dd>
<p>when the attribute is not defined for the path.</p>
</dd>
<dt class="hdlist1"><em>unset</em></dt>
<dd>
<p>when the attribute is defined as false.</p>
</dd>
<dt class="hdlist1"><em>set</em></dt>
<dd>
<p>when the attribute is defined as true.</p>
</dd>
<dt class="hdlist1">&lt;value&gt;</dt>
<dd>
<p>when a value has been assigned to the attribute.</p>
</dd>
</dl>
</div>
<div class="paragraph">
<p>Buff