.setDescription("A Web network");
AttributeList attrList = new AttributeListImpl(AttributeClass.NODE);
gexf.getGraph().getAttributeLists().add(attrList);
Attribute attUrl = attrList.createAttribute("0", AttributeType.STRING, "url");
Attribute attIndegree = attrList.createAttribute("1", AttributeType.FLOAT, "indegree");
Attribute attFrog = attrList.createAttribute("2", AttributeType.BOOLEAN, "frog")
.setDefaultValue("true");
Node gephi = gexf.getGraph().createNode("0");