mbined together in one call. For simplicity, we use the default
        one. The following query return values intersecting a box. The sequence of
        <code class="computeroutput"><span class="identifier">Values</span></code> in the result is not
        specified.
      </p>
<p>
</p>
<pre class="programlisting"><span class="comment">// find values intersecting some area defined by a box</span>
<span class="identifier">box</span> <span class="identifier">query_box</span><span class="special">(</span><sp