f the domain.</p></dd></dl><dl><dt class="spec value" id="val-is_bottom"><a href="#val-is_bottom" class="anchor"></a><code><span class="keyword">val</span> is_bottom : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> bool</code></dt><dd><p>Return true if this is the bottom value</p></dd></dl></details></div></div></div><dl><dt class="spec value" id="val-singleton"><a href="#val-singleton" class="anchor"></a><code><span class="keyword">val</span> singleton : <a href="../../../IBase/Location/index.htm