graphml.graphdrawing.org/xmlns/graphml&quot;  xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot; xsi:schemaLocation=&quot;http://graphml.graphdrawing.org/xmlns/graphml http://graphml.graphdrawing.org/xmlns/graphml/graphml-attributes-1.0rc.xsd&quot;&gt;
  &lt;key id=&quot;key0&quot; for=&quot;node&quot; attr.name=&quot;name&quot; attr.type=&quot;string&quot; /&gt;
  &lt;key id=&quot;key1&quot; for=&quot;edge&quot; attr.name=&quot;weight&quot; attr.type=&quot;int&quot; /&gt;
  &lt;graph id=&quot;