<ORDEREDLIST>
<LISTITEM>
<PARA>The window is mapped with <FUNCTION>XMapWindow</FUNCTION> 
or related routines.
</PARA>
</LISTITEM>
<LISTITEM>
<PARA>All its ancestors must be mapped.  This
condition is always satisfied for the children of the root
window, the top-level windows of each application.
</PARA>
</LISTITEM>
<LISTITEM>
<PARA>The window must not be obscured by visible
sibling windows or their
ancestors&emsp;this depends on the stacking order.  When first
mapped, a window appears on top of its siblings, which will
be on top of all windows if its parent is the root window.
</PARA>
</LISTITEM>
</ORDEREDLIST>
