Specifies whether to generate the <b><i>Overview Summary</i></b> page/block.
<p>
The <i>Overview Summary</i> may be generated only once for the entire XML schema documentation.
It appears the first in the <i>details</i> frame of framed HTML documentation (when it is started)
or on the first page of single file documentation (RTF).
<p>
<b>See Also:</b>
<dl><dd>
<i>"Details | Overview Summary"</i> parameter group, which controls the exact content
of the <i>Overview Summary</i> page/block.
</dd></dl>