n the
<a class="reference external" href="http://graphml.graphdrawing.org/">GraphML</a> format.  Both overloads of <tt class="docutils literal"><span class="pre">write_graphml</span></tt> will emit all of
the properties stored in the <a class="reference external" href="../../property_map/doc/dynamic_property_map.html">dynamic_properties</a> object, thereby
retaining the properties that have been read in through the dual
function <a class="reference external" href="read_graphml.html">read_graphml</a>. The se